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Anthony Francis-Jones
Великобритания
Добавлен 4 май 2017
A collection of videos on various topics:
F-J's Physics concentrates on interesting physics topics and physics experiments both for interest and for GCSE and A Level.
F-J's Corona Busters: Bespoke lessons for KS3, GCSE, and A Level Physics for use by science students who's schools are closed.
Do Do This At Home: Short videos with fun 'try at home' physics and science experiments. [See disclaimer below]
F-J and Stef's Quirky Tours: Quirky travel films and guides of the more unusual things to see and do in some towns and places.
Other video blogs on a range of topics that interest me.
Disclaimer:
NOTE: DO NOT attempt any of the experiments that I do unless you are FULLY conversant with any risks they involve and you are aware of all of the health and safety implications of doing them. I have 30 years of physics teaching experience and sometimes the videos make things look easier than they actually are. CLEAPSS in the UK is an excellent resource for such matters. Stay safe!
F-J's Physics concentrates on interesting physics topics and physics experiments both for interest and for GCSE and A Level.
F-J's Corona Busters: Bespoke lessons for KS3, GCSE, and A Level Physics for use by science students who's schools are closed.
Do Do This At Home: Short videos with fun 'try at home' physics and science experiments. [See disclaimer below]
F-J and Stef's Quirky Tours: Quirky travel films and guides of the more unusual things to see and do in some towns and places.
Other video blogs on a range of topics that interest me.
Disclaimer:
NOTE: DO NOT attempt any of the experiments that I do unless you are FULLY conversant with any risks they involve and you are aware of all of the health and safety implications of doing them. I have 30 years of physics teaching experience and sometimes the videos make things look easier than they actually are. CLEAPSS in the UK is an excellent resource for such matters. Stay safe!
The 100 Light Switches Problem - F-J's Physics - Video 196
Here is an interesting maths problem and a demonstration I have built to see what the solution might be. It involves 100 people switching specific light switches on and off. Join me to find out what it is all about and what happens. The end result is quite intriguing!
Many thanks again to PCBWay for sponsoring this video
www.pcbway.com/
Please consider supporting my work by buying me a coffee at
www.buymeacoffee.com/francisjonesa
Helps me buy bits and pieces to make these videos!
Very many thanks, F-J
Many thanks again to PCBWay for sponsoring this video
www.pcbway.com/
Please consider supporting my work by buying me a coffee at
www.buymeacoffee.com/francisjonesa
Helps me buy bits and pieces to make these videos!
Very many thanks, F-J
Просмотров: 177
Видео
Binary Seconds of Sunlight Counter - F-J's Physics - Video 195
Просмотров 21414 дней назад
Learn a bit about digital electronics, binary counters, and analogue sensors with this unusual Binary Seconds of Sunlight timer I have designed. You might want to have a go at building it yourself too! Many thanks again to PCBWay for sponsoring this video www.pcbway.com/ Please consider supporting my work by buying me a coffee at www.buymeacoffee.com/francisjonesa Helps me buy bits and pieces t...
Measuring the Power of a Bunsen Burner - F-J's Physics - Video 138
Просмотров 11221 день назад
In this interesting experiment I attempt to measure the power (in Watts) of a roaring Bunsen burner flame. Please consider supporting my work by buying me a coffee at www.buymeacoffee.com/francisjonesa Helps me buy bits and pieces to make these videos! Very many thanks, F-J
A Totally Opaque Lens! The Wax Lens - F-J's Physics - Video 141
Просмотров 240Месяц назад
A lens that you cannot see through! But great for refracting microwaves. Sorry, but I wish I had made the audio carried by the microwaves a bit louder but it still works OK if you listen carefully! Please consider supporting my work by buying me a coffee at www.buymeacoffee.com/francisjonesa Helps me buy bits and pieces to make these videos! Very many thanks, F-J
Curves of Constant Width - F-J's Physics - Video 194
Просмотров 364Месяц назад
These rotors look really odd but what happens if they support an object and roll on a flat surface? Let's build some, find out and explain how they work. Many thanks again to PCBWay for sponsoring this video www.pcbway.com/ Please consider supporting my work by buying me a coffee at www.buymeacoffee.com/francisjonesa Helps me buy bits and pieces to make these videos! Very many thanks, F-J
Aluminium Foil Ball Challenge - F-J's Physics - Video 193
Просмотров 4542 месяца назад
Having seen others try the Aluminium Foil Ball Challenge I thought I would give it a go. Not too difficult and a pleasing end result but on and off it took me two years to complete! Let's see how I did it. Many thanks again to PCBWay for sponsoring this video www.pcbway.com/ Please consider supporting my work by buying me a coffee at www.buymeacoffee.com/francisjonesa Helps me buy bits and piec...
Faraday's Ice Pail - F-J's Physics - Video 137
Просмотров 3062 месяца назад
A wonderful and yet simple experiment to show how charge distributes on a closed and isolated conductor. Even if you know the result the experiment is still quite surprising!
Electron Optics - F-J's Physics - Video 135
Просмотров 4312 месяца назад
In some situations beams of electrons can behave just like light. Here I demonstrate some of the ways that electron beams can be steered, produce magnified and reduced images, as well as rotated images. An interesting and unusual use of the Maltese Cross Teltron tube. Please consider supporting my work by buying me a coffee at www.buymeacoffee.com/francisjonesa Helps me buy bits and pieces to m...
Lobe Pump - F-J's Physics - Video 191
Просмотров 3393 месяца назад
The Lobe Pump is an interesting example of interlocking 'gears' used to pump various items including solids. See how I make one and demonstrate it working with solids and even smoke! Leibniz Wheel ruclips.net/video/wjENvJyMfWg/видео.html Square Gears ruclips.net/video/E3d9Qlk cY/видео.html Many thanks again to PCBWay for sponsoring this video www.pcbway.com/ Please consider supporting my work b...
Bermuda Triangle Explained?! - F-J's Physics - Video 192
Просмотров 2133 месяца назад
You may have heard about the weird and wonderful goings on in the Bermuda Triangle. But what is the truth behind it all? Here I attempt an explanation! Right or wrong the mystery will, I am sure, continue! Please consider supporting my work by buying me a coffee at www.buymeacoffee.com/francisjonesa Helps me buy bits and pieces to make these videos! Very many thanks, F-J
Uranium Glass - F-J's Physics - Video 190
Просмотров 5203 месяца назад
Tableware with Uranium in it! This rather innocuously looking glassware hides a secret... it contains Uranium! Let's have a look at its history, how the Manhattan Project affected its production, what happens to it under UV light and just how radioactive it actually is! Otherwise known as vaseline glass this Uranium glass is highly collectable! Link to the Radioactive Clock video: ruclips.net/v...
Paper Twist Friction - F-J's Physics - Video 152
Просмотров 3054 месяца назад
Using friction in a clever way to separate sheets of paper or leaflets you need to hand out. One you can easily try at home too!
Electronic Leibniz Wheel Mechanical Calculator - F-J's Physics - Video 189
Просмотров 3664 месяца назад
You might have seen my previous video on a self-designed version of a 17th Century calculating machine using a Leibniz Wheel ruclips.net/video/wjENvJyMfWg/видео.html but here I add some electronics to give this 17th century calculator a 21st century update with a simple optical sensor and digital counter. Many thanks again to PCBWay for sponsoring this video www.pcbway.com/ Please consider supp...
Density Bottle (Water vs Avgas) - F-J's Physics - Video 175
Просмотров 3744 месяца назад
Density Bottle (Water vs Avgas) - F-J's Physics - Video 175
Chirality Explained - Chiral Apples - F-J's Physics - Video 187
Просмотров 2045 месяцев назад
Chirality Explained - Chiral Apples - F-J's Physics - Video 187
Leibniz Wheel Mechanical Calculator - F-J's Physics - Video 188
Просмотров 5205 месяцев назад
Leibniz Wheel Mechanical Calculator - F-J's Physics - Video 188
Magnetic Core Memory Demonstrated (Part 2) - F-J's Physics - Video 183
Просмотров 5545 месяцев назад
Magnetic Core Memory Demonstrated (Part 2) - F-J's Physics - Video 183
Periodic Table With Real Elements - F-J's Physics - Video 184
Просмотров 2586 месяцев назад
Periodic Table With Real Elements - F-J's Physics - Video 184
Faraday Cage - F-J's Physics - Video 186
Просмотров 5276 месяцев назад
Faraday Cage - F-J's Physics - Video 186
Relay Logic Gates - F-J's Physics - Video 183
Просмотров 4616 месяцев назад
Relay Logic Gates - F-J's Physics - Video 183
Electron Mirror - F-J's Physics - Video 131
Просмотров 35 тыс.6 месяцев назад
Electron Mirror - F-J's Physics - Video 131
Tesla Valve - F-J's Physics - Video 181
Просмотров 4527 месяцев назад
Tesla Valve - F-J's Physics - Video 181
Reed Relay Logic Gates - F-J's Physics - Video 182
Просмотров 3117 месяцев назад
Reed Relay Logic Gates - F-J's Physics - Video 182
Pumpkin Seed Effect - Solid, Solid Water Jet Mixing - F-J's Physics - Video 176
Просмотров 3477 месяцев назад
Pumpkin Seed Effect - Solid, Solid Water Jet Mixing - F-J's Physics - Video 176
Relays and How They Work - F-J's Physics - Video 180
Просмотров 2677 месяцев назад
Relays and How They Work - F-J's Physics - Video 180
Pinhole Camera Explained And How To Teach It - F-J's Physics - Video 165
Просмотров 5838 месяцев назад
Pinhole Camera Explained And How To Teach It - F-J's Physics - Video 165
Magnetic Core Memory Explained (Part 1) - F-J's Physics - Video 179
Просмотров 1,2 тыс.8 месяцев назад
Magnetic Core Memory Explained (Part 1) - F-J's Physics - Video 179
Switch Bounce Detector - F-J's Physics - Video 178
Просмотров 4218 месяцев назад
Switch Bounce Detector - F-J's Physics - Video 178
LED Cube - Christmas Project! - F-J's Physics - Video 177
Просмотров 2519 месяцев назад
LED Cube - Christmas Project! - F-J's Physics - Video 177
Numitron Tubes - F-J's Physics - Video 174
Просмотров 3859 месяцев назад
Numitron Tubes - F-J's Physics - Video 174
Sir, when did you make this experiment? I need the time information for my paper. Thank you
My pleasure: Filmed on 20/04/2018 and published on 26/07/2018 in England, UK Hope that helps.
Thank you so much. Hopefully I can learn much from you.
My pleasure and good luck with the project.
This was actually a rather interesting problem. I realized fairly early on that whether a switch was lit at the end or not would depend on whether the number of its factors was odd or even, but I had never actually realized before that the only numbers with an odd number of factors are also squares!
Thanks. Yes it is a very interesting problem and it was fun trying to show it this way. Thanks for sharing your thoughts!
Interesting 🙂
Glad you liked it!
I wondered which switch is switched the most, Gemini said switch 1, Chat GPT said switch 60.
Yes, David, it is 60. It is a high composite number and the first one out of the 100 switches to have 12 factors. Then 72 and then 84, 90, 96 I believe.
1 is obviously not correct, because that is only ever switched on the first turn (because 1 is not divisible by anything except 1).
Yes, it has only one factor.
Fun as always Anthony
Something a bit different this time Mark!
All prime numbers? Edit: Oh! Interesting to see how far each lamp is spaced from each other (2n-1) ... Hope that's not a spoiler. 😅
Good guess! Note that some are divisible by 3 (for example) so cannot be prime numbers! Thanks for watching!
@@AnthonyFrancisJones I guess my comment was confusing. The first line was my first guess as you requested. I then editted the comment to add my new understanding. Anyway, interesting how that turned out.
Excellent and you did exactly what I did which was worked away at different patterns until one seemed to emerge the winner! Thanks for your comments as ever!
@@Rouverius By the way, I meant to put up any picture for the thumbnail but it turned out I put up a rather 'relevant' one by accident! Glad you still watched the video though!
Yes it may be an interesting thing to make when learning about electronics. A number of other comments have criticised your work but I don't think you clamed it to be perfect. It is probably impossible to make anything perfect so don't worry about it. If you want to make it better then yes it is possible to make the timing circuit more accurate by using a crystal setup and keep it temperature controlled. The supply voltage also has to be controlled. The sunlight control could of cause also be made more accurate say by using an operational amplifier to make a sharp counting cut off but in all occasions any little bit of cloud in the sky will change the amount of sunlight/daylight that you get to your sensor and there fore make it less accurate. You can really only count how much time the light has a certain intensity. In stead of digital time counting you could have made it to indicate in hours, minutes and seconds. It would be slightly more complicated but there are components that do most of it. I have an education as an electronic design engineer so of cause it isn't very complicated for me. Unfortunately I never really worked as one but I have once designed a circuit that measured the output voltage of a transformer and then adjusted the input to the transformer by switching input setting on the transformer to achieve a constant 240V output. I did it by having it counting up and down. If the output was a little high it counted a step down and low counted up. It was designed for compensating for varying input voltages. It was never put into production as noise from the output could blow up the triac's that where used for the switching. Triac's where the only thing available that could handle the current 35 years ago. The factory I designed it for decided to copy some body else's design in stead. They just measured input voltage and then adjusted so that the output voltage would be close to correct but that doesn't compensate for varying loads on the output. My design did.
Leonardt, thanks very much for this. Yes you are totally right. I am just sharing some of my ideas at builds to encourage those that are beginners to go that little bit further and think about what they could design and build as a device without worrying too much about its final functionality. As well to build something without resorting to the likes of Arduinos and code to solve problems. As a kid I knew what most of the chips did but did not really visualise how to string them together to do things. Building like I show now helps to get this modular idea across. It's just a bit of fun really! You understand that fully! I do, however, value all the wonderful comments I have had including constructive criticism and how one could improve the designs. They are really interesting too. Thanks for sharing your experiences. Always great to hear other people's stories and experiences. That's what makes it all worthwhile!
Your 13 hour versus 15 hour deviation may also come from the way you generate the clock signal. It is pretty hard to calibrate a RC unit to a specific frequency. The capacitor will have deviations from the printed value and worse the whole thing is temperature dependend. Even with a quarz crystal you will not get the exact frequency printed on the crystal, which will eg. lead to deviations in the range of 20 to 30 seconds in a week. You may use dedicated 32767 Hz crystals which are cut in a way to keep that frequency as close as possible but even they need to be trimmed by using capacitors at the crystal to give long time stabililty. Watchmakers will adjust those to the typical temperature also, as there is a temperature difference in between a wrist watch and a watch hanging on the wall. One very easy way to get a pretty good, long time stable clock is to use the power grid as a clock source. The frequency (in Europe 50Hz) is actually tracked precisely and regulated to give a stable clock signal. Over the course of some month it may run a little slow or fast but then it is regulated to counteract that and bring the difference to eg. an atomic clock back to zero. In former times this signal was used to drive the clocks at railway stations but this precision is also needed to synchronize the generators in power plants. In summary: creating a stable, precise clock signal is not an easy task, since even small deviations will add up over time pretty fast. If your 13 to 15 hour deviation bothers you (I understand that this is more of a fun project then some precise measuring equipment), the first thing I would do is check the clock source by letting it count for a few days uninterrupted and compare the number of ticks with the offical time.
Thanks for the excellent comment (more than just a comment but that's what RUclips call them!) Yes, agreed, this is just a bit of a fun project as you say. As you say the 15% error could come from so many places, from temp changes to component tolerances (though I would be surprised if these change that much - rather being fixed in value). I think the main thing is down to my calibration of the LDR part of the circuit. It only points in one direction and through the window at that! With a clear sky I notice our solar panels are never as effective as when there is scattered light! The 555 calibration was only done over a short time period too. I am tempted to adjust the trim pot to see if I can get a better setting but I guess as soon as I knock the LDR board out of place it will all change again! Just a bit of fun but I enjoyed the design and build! Now, I really should buy a caesium clock... Well, I'm not Curious Marc!
I’ve never been to Shrewsbury though I have a retired doctor friend who lives near the prison thanks for your video and info
Thanks Stephen. You should go. We feel that we are really lucky to have such a beautiful town close by. There are even rickshaw bikes that do free town tours now! Glad you liked the video and let us know if you end up visiting. BTW you can do tours of the prison too, another of Thomas Telford's builds!
What an interesting project! I suspect fewer LEDs would be needed here in Scotland. A raindrop counter on the other hand...
Yes! Good point! You have got me thinking... should I build one that measures the depth of water in my rain gauge in binary. Might get more use!
Old school, I could have made it in 1975. I've seen a thing that records sunlight by having a glass sphere that focuses the sun on a piece of paper and leaves a record by burning (The Campbell-Stokes sphere). Exercises for students, replace the binary counters with decimal. Use the LEDs to detect the sunlight. Replace it all with 20 lines of Arduino code. Use an ir thermometer chip to monitor the temperature of the sky. Good fun, thanks for the videos.
Yes, I think the 555 timer at least comes out of a box of ones I had as a teenager! I did think of putting a decoder on it to show the values in decimal too on seven segment displays but I felt I wanted to keep this binary. Using an LED as a light sensor is a good application and one that not everyone is aware of. I have been meaning to do a video on the C-S solar recorder for a while. You can use a piece of film and a pinhole camera shoebox or a simple convex lens, toilet roll tube and paper. Obviously I would want students to be aware of the risks of working with bright sunlight. Do you remember that lady's house that burnt down, was it last year, with a glass item causing the curtains to go on fire! Always good to hear from you and hope you enjoy my next ones!
Where do you get the rule marked in mm? Most steel rules are in numbered in cm, although graduated in mm . I use my CNCd milling machine to do my drilling for me! I am awaiting boards from JLCPCB (currently at Heathrow - should be with me in a day or two) for CNCing my lathe. Perspex is an excellent material for mounting simple circuits. I have one of those printers too - all my components are logged in a database, and located in a raaco cabinet (or Gratnell for larger stuff) labelled with bar codes. I use Sainsbury's sauce pots - 40 ml with screw-on lids, two will fit in a component drawer. An app on my 'phone will scan barcodes and look up in my database - very useful as memory fades with age. Now, get your device to measure oktas.
Wow! That sounds like you have a fantastic and well sorted set up! I have a few Raaco type cabinets mainly for electrical connectors (most of which I will never use such as MUSA etc!) and bolts of all sizes. As a teacher I love Gratnalls' trays. Brilliant in every way and I still use single ones for keeping project parts together. Currently I just don't have the space for a good pillar drill, lathe etc. Wish I did but I kind of like my less technical way of doing things! What are we to do with all this stuff when our time is up. My partner would have no idea. Just hope my son takes and interest! As far as the steel rule goes. I have had it for over 20 years. It does not have a name on it but I think we had sets of them in the school's DT department if I remember rightly. I had lots of wooden metre rules in the lab too and some of them were ridiculously badly marked. The kids were always struggling to read them correctly. Shame comments do not allow the posting of photos as it would be interesting to share ideas and workshop layouts. BTW seems to be far from CAVOK here and permanently 8 Oktas! Good to hear from you as ever and do keep the comments coming!
This is a fun one Anthony Thanks
Thanks Mark! Useless at the moment as our summer weather is so poor!!
6;10 Argh!!! I always insisted my students include the units - it's Physics not Maths. More than that, at A level and beyond I insisted on separating mantissa and exponenty bits, and the units, then dealing with each group separately. It provides a useful check.
Yes, you are absolutely right. There are at least two approaches and I think there is a time and a place for each. I always feel it provides some inner understanding if done well, for example Force x Velocity being in units of Power - not obvious a very first sight to a beginner! (BTW I am constantly annoyed by adverts for phone power bank batteries on the internet offering batteries with 90000000mah ratings! What is going on there??! I must get one of these!!)
@@AnthonyFrancisJones At school, in the days of Dymo tape, friends and I annotated a PP9: "Beware: 9000 mV". It just shows how the humour threshold shifts with maturity.
Excellent! Yes, the days of sending students to get a 'long weight' or 'some resistance' from the technician! On a more serious note I remember the problems the general public had dealing with the units after the Chernobyl disaster or even the 'massive' energy of the LHC. 14,000,000,000,000eV ! BTW what do you feel about commas as order of magnitude separators - I note my overseas pupils all use full stops. It gets very confusing!
I always like this kind of practical approach to physics. Unlike the tests where I got asked if voids in semiconductors have mass, and to calculate it.
Agreed! It is good if you can actually test something out and get a feel for it like in my experiments. I set myself a challenge of doing an experiment or demo every single lesson. Got harder with time and pressure! Thanks for watching and taking the time to comment too!
@@AnthonyFrancisJones Actually thank you for taking the time of making these videos and also replying! Cheers from Argentina!
@@cocusar My pleasure and it is always good to hear where people are watching from!
Please consider supporting my work by buying me a coffee at www.buymeacoffee.com/francisjonesa Helps me buy bits and pieces to make these videos! Very many thanks, F-J
I’m 24 years old and hated school so much, but then one semester my senior year I got my first A (that never happened before lol) in a science class. The only reason why I did well is because the teacher was so good at making science fun and interesting, naturally triggering my curiosity. You, my friend, have that same ability. Thank you for making science cool and engaging.
Thank you. That's very kind of you and I am pleased that a teacher got your interest going and unlocked your potential! Always great to hear stories like that. Glad you liked this rather unusual video. I had fun making it! Hope you enjoy some of the others too. I try to do something a bit different from all the other (larger) channels and there is more to come! Look forward to hearing how you get on.
Thanks for the demonstration. It's nice to know how the classic and original instruments work in those adverse conditions where modern digital instruments are not able to operate! Please make a video on vernier calipers too if possible.
Thanks - yes, they won't let you down when batteries fail! Good idea, I must do one on vernier calipers too. I had a huge school class demo slide rule a while ago and when we moved I chucked it out. As with most things I have thrown out, I wish I had kept it! As ever thanks for watching and your support of the channel.
@@AnthonyFrancisJones Thanks, sir is it possible for you to do a demo on potentiometer and metre bridge and how to compare emf of two cells or determine internal resistance of a cell. I checked the slide rule from the internet, it's really a cool device!
Yes, those are real old-school but important experiments. I will have to have a go at some stage. The Wheatstone Bridge is such an important device to understand before doing other such experiments. Keep studying hard!
Genius you are a smart man thank you for all your info
Thanks, that's very kind of you and glad you liked it! Thanks for watching too!
Hi sir! what if when we bring the perch its resting on upwards and then tilt it any way, what happens?
Good question. So this is a static effect so if you were to do it quickly the acceleration might well make it fall off in the same way as if you suddenly moved it sideways. However, if all the movements are done slowly/gently then you can move it up and the centre of gravity does not change its position with respect to the perch (I think I demonstrate this) and it will remain balanced. Then, if you tilt it, as long as there is a bit of perch in contact with the bird's beak and there is enough friction it will still be supported as the centre has still not moved with respect to the perch. However, friction will limit the angle that it can be tipped through and of course if at 90 degrees there will be no actual support under the beak at all so it will fall. Hope that makes sense and helps. Good question!
@@AnthonyFrancisJones Thanks teacher i understand fully!
@@certifiedmunch.876 Excellent - hope your studies continue to go well!
You are the best I was giving a test and didnt know this one so lost 5 marks But now I will never lose marks on this topic again
Excellent! The main idea is to realise that there is constructive and destructive interference happening as incoming and outgoing wavefronts meet. Getting the hang of where there is a 180 degree phase change is not easy and if the reflection is off the top or bottom surface of the oil but I hope you get the general idea from this simplified explanation. Have you seen this one too using a DVD or CD? ruclips.net/video/GcKttihc8ts/видео.html Good luck with your studies!
Does those plates stay all time charged with same charge? Negative stays negative and positive stays positive? Thanks.
Yes. they do as they are directly connected to the + and - of the power supply all of the time. There will of course be a tiny fluctuation when the ball touches but nothing that one would notice at all. It would be a different matter if a huge charge was put on plates and then they were disconnected and the experiment run again. The ball shuttling would have the effect of slowly passing opposite charge to each plate and neutralising them bit by bit! Good question and thanks for watching!
@@AnthonyFrancisJones thank u for ur answer. What is the name of that HV name please?
@@pintchigawza6496 It is a 5kV school (low current) EHT power supply. www.science2education.co.uk/product/power-supply-units/EL10370 However, you must know what you are doing when using these to keep safe.
@@AnthonyFrancisJones thanks
Excellent demonstration. I tried to write a comment but it was deleted. Here is another thought: I wonder if Ultrasound could be directed with a Microwave to extend its propagation distance? Here is an example of the type of ultrasound I had in mind: Ultrasonic Obliterator at 170,000fps - The Slow Mo Guys
Thanks. It is an unusual piece of apparatus isn't it! I did not delete the comment but when you comment there are two buttons very close together 'Cancel' and 'Reply'. I have typed a long comment before and hit the Cancel button by mistake and lost it all! I will have to look at the Slow Mo Guys video - thanks for the tip and for watching and taking the time to comment a second time!
Excellent demonstration.
Thanks again Tony. Filmed a while ago but such an interesting odd piece of apparatus!
Please consider supporting my work by buying me a coffee at www.buymeacoffee.com/francisjonesa Helps me buy bits and pieces to make these videos! Very many thanks, F-J
Thank you so much I was attempting to do it just now Had no idea I have Hayes manual Didn't explain Thank you!!
Great! I went round in circles until I got the bulb out so just had to share how to do it! Glad it helped you!
What's that and name of that thing next to green box? Your right side It reminds me so much On something so VVIP
Do you mean the large horseshoe magnet?
Maybe someone else can clarify, but afaik the Darlington array and even the BFY51 transistors are really only needed because there needs to be enough current on the other side of the transformers to drive the LED pairs for each segment of the 7-segment display. If you want to just read the binary data from the core rope memory you probably dont need nearly as much current and can therefore trim a lot of the current boosting transition circuitry
Good question and I hope this answers this. Remembering that each core is used as one bit of data and it works as a transformer, you do need an AC signal to make it work. I use the transistors here to switch this AC (square wave) on and off depending on whether it is a lit or not lit LED that is needed. They LEDs or the cores cannot be directly driven from the 7 segment display chip if that makes sense. That is why there are two 555 timers - one to scroll the digits and one to proved the cores' high frequency signal that gets switched on and off. Hope that helps and thanks for asking!
Fantastic thankyou @ 8:20 the gate I was waiting for you to find a rock 😂
Thanks Neil! Yes, those gates! Lots of getting in and out. Not very common on public roads anymore but at least the handbrake held! Thanks for watching and taking the time to comment too!
@@AnthonyFrancisJones have you watched the gods must be crazy the start of the show is a series 1 it’s hilarious Take care and safe travels N
No. But I know I must!
Another great video F-J! I love the maths of this one and also the challenger reference, I’ve never heard that before but it does make a lot of sense. Well done Barry for all his help in your wonderful videos, a chip of the old block for sure. 😎❤️👍
Thanks and great to hear from you! Yes, this was an interesting one to make. The Challenger connection is facinating - I think I forgot to make it clear that the issue with the SRBs caused a flame front to leak out burning out the O rings but I guess that was obvious! I think it is a great bit of maths too! Must do solids of constant width at some stage. Working on a few maths based ones at the moment which I think you will enjoy. Hope to get them sorted soon!
Absolutely spot on, thank you! I’ve been fiddling with this for ages, will have to remove the battery for access but at least I know how to get the bulb out now. :-)
Thanks Alice! Yes it is so simple when you know but I spent ages fiddling about struggling with it! Hope you are successful!
Thank you for rhe effort!
Thanks Eugene. I made this ages ago and was quite pleased with it but it never generated much interest. Good that you enjoyed it!
Great videos!!!
Thanks again Eugene and for supporting this small channel. Hope you enjoy some of the other videos too!
👍👍👍👍👍👍👍👍👍👍👍
Thanks Poma. Not quite Christmas but a nice experiment none the less! I like the videos you have done with fruit and LEDs!
This has given me an idea how to make something (not a ball) I've been thinking about for some time, foil will work but I think I will be using a hydraulic press not a hammer.
Look forward to hearing more...!
What a great video, I think putting different shaped ones on the same chassis makes it much more interesting, you haven't quite got square gears out of your system have you🤣 Tony J
Thanks! Glad you liked it! Yes, my thoughts go in phases and it's gears etc. at the moment. Now, here is an interesting idea that I have not seen done before: what I want to do is put a belt all the way round it so it becomes a level but odd shaped rotor caterpillar track. I think that would be fun and very counter intuitive! Sounds like something Colin Firze would build (with a massive engine on it!).
What a nice guy
Thanks Jakob. Guess you mean my son rather than me!
Video made for physicists and engineers but half the audience are medical students 😂
Yes, not what I expected at all but I learnt something from them that one must not forget fluid dynamic effects in blood flow too! Physics is everywhere!
Love this, thank you for sharing!
Pleasure! Glad you liked it. Rather niche but I thought it is something that people should see regardless! Hope you enjoy some of the other videos too. Do let me know!
Fantastic explanation, but u could have used a little more technical terms
Thanks Muhammad. Is there anything more technical that you would like me to explain or to add? If so I can add it to the pinned comments. I made this video as a general science example so it was not meant to be too technical but I get your point - there is so much more one can say about strobes and strobing effects! Thanks for watching and taking the time to comment.
@@AnthonyFrancisJones How rotational speed of the fan can be matched with the frequency of light, by determining the amount of time the fan rotates to it's position and having that frequency in the light etc, overral a little more depth on technical side.
@@MuhammadAnas_Official Thanks, that's a good idea and would allow for the introduction to angular velocity ideas. I could do the experiment with a swinging pendulum too to show the similarities of linear (small amplitude) oscillations to circular motion. I guess I only have under an hour in my lunch break and no script so they are a bit quick and simplified but I do really value your input. It is always great to get suggestions even for other videos such as the Tennis Racket Effect or the Halbach Effect which were both suggested by different subscribers. There is so much interesting physics out there!
Thanks Anthony
Pleasure Mark and thanks for supporting the channel as ever!
I love welescos I've got 987 of them
Excellent! I have a few Wilescos and a few Mamods - love all of them!
Not _quite_ as spherical as ruclips.net/video/ZMByI4s-D-Y/видео.html (!) but pretty good nonetheless. It would be interesting to see what the material is like in cross section close up, e.g. with a scanning electron microscope. A good proportion of it must still be air with a bit of oxide too, but I wonder how it's distributed.
Yes, I remember that sphere when it was discussed in Physics World a few years ago. Not quite that close indeed! I really would not want to cut it in half but would be interesting to see what it looks like. Ultrasound would just produce an mess of an image I think. Adam Savage did a good job with the water jet cutting ruclips.net/video/onZDAKJq6z4/видео.html I really feel that, whilst there must be lots of voids, dirt/oxide etc. the layers may well have got close enough to form metallic bonds. It was a fun project regardless and thanks as ever for your interesting observations. Do keep them coming!
Please consider supporting my work by buying me a coffee at www.buymeacoffee.com/francisjonesa Helps me buy bits and pieces to make these videos! Very many thanks, F-J
Please consider supporting my work by buying me a coffee at www.buymeacoffee.com/francisjonesa Helps me buy bits and pieces to make these videos! Very many thanks, F-J
Please consider supporting my work by buying me a coffee at www.buymeacoffee.com/francisjonesa Helps me buy bits and pieces to make these videos! Very many thanks, F-J
Please consider supporting my work by buying me a coffee at www.buymeacoffee.com/francisjonesa Helps me buy bits and pieces to make these videos! Very many thanks, F-J
Please consider supporting my work by buying me a coffee at www.buymeacoffee.com/francisjonesa Helps me buy bits and pieces to make these videos! Very many thanks, F-J
Please consider supporting my work by buying me a coffee at www.buymeacoffee.com/francisjonesa Helps me buy bits and pieces to make these videos! Very many thanks, F-J
Please consider supporting my work by buying me a coffee at www.buymeacoffee.com/francisjonesa Helps me buy bits and pieces to make these videos! Very many thanks, F-J