I'm an engineer altough I did not learn anything new from the video (I wasn't expecting too, I was just curious) I find it well put togheter and easy for anyone to understand, good job.
I love your channel. You are the most informative guy out there in this field. One question I have struggled with is the impact of SMA adapters and extensions on FPV signal quality. I have seen various "vigorous " discussions on the topic, but I have never seen anyone demonstrate the practical effects of adding adapters. I have had difficulty balancing the center of gravity on several quads, but I have always a been hesitant to use an extension for antenna placement. Similarly, on my goggles, an adapter would appear to give better positioning and focus, but I am worried about signal loss. I think you might be the only guy with the equipment and teaching ability to break it down for us. Hopefully you can cover this topic one day. Great channel. Love your work!
1/100ith of a second is called a "jiffy". In New Zealand, 1 AC cycle equals 2 jiffies. Marvelous video Bruce! Ones knowledge should be imparted. Cudoes! Keep up the tutorials.
I would like to say thank you very much for this video, you have explained it really well and i actually get it now. I love your vids and will continue to learn from them. keep up the good work. Thanks again Bruce. Cheers Dan
That's a great applied physics class. If one kid starts to like physics because of the hobby, that was a time well spent. Big fan of your channel. Keep'em coming!
Your educational videos are truly inspirational. You have an amazing ability to transfer knowledge in a concise and interesting way. Please continue with this series.
Thank you so much Bruce. I am sure these video's take a bit more effort to make with different shots, editing etc. I appreciate it and enjoy the education.
Good video Bruce. thanks for taking the time. FYI. It is 60Hz in Saudi Arabia as well. 130V Line to neutral at consumer level. The reason is that the first generators were imported from the US and it connects to UAE and other nag boring countries through High voltage DC as they are all 50Hz.
Excelente vídeo Bruce, And although there is tons of videos explaining how to do that spot welder stuff please do one too.... you can make it look so much easier and it would help a lot of people... including myself Thaks
Great to see you continuing to give back to the hobby & share this in a very easy-to-understand approach for everyone. My young boys are also able to learn as you go too :)
videos are really helpful. would be really greatful if you did a microwave spot welder. i am working on a electric skateboard and was thinking about making my own lithium ion battery pack for it. your videos are always clear and knowledge you give is safe. this would help me make something that was usable and not just a hack. thanks from the other side of the pond.
this is why I follow your channel. sure, the reviews are very interesting but let's be honest, I won't buy even 5% of what you show. this lessons on the other hand are really well made and educational. thanks for these and thanks you exist :)
You had 101 thumbs up there Bruce and I just made it 102, so I look forward to more advanced work. Really liked this vid but I'm not coming from a completely newbie base on the subject and look forward to the rest and will look forward to getting my HAM licence. In Oz, they just (CASA) put in a 120m height and 5.3 Km airport barrier. That really sux from my point of view...
Hi Bruce, thanks for taking the time to make these educational videos, they are invaluable. Special request - could you, at some point, do one explaining how induction in brushless motors works? In particular, back emf and flyback diodes vs active freewheeling, and active/regenerative braking. I've been trying to find out how these things work at the electronics level but to no avail! I'd be very grateful if you could explain it in layman's terms! Thanks, Alastair
Great stuff, Bruce. I really wish we'd had you back in the day when it was just Grob, Malvino, and lackluster instructors - would have made grasping theory a whole lot easier ; )
Also, please add all the videos about basic electronics to your "Electronics 101" playlist. Since you have so many videos it was hard to find the ones I was interested in, and hard to know if you have more videos on this topic without going through lots of videos. The Ohm's law video for example is missing in that playlist.
Excellent stuff. Thanks for this series, cant wait future episodes. Why isn't it possible to achieve the same effect with DC, varying the voltage from 0 to x volts at high frequency instead of an AC current ?
most materials used in transformers keep their magnetic polarity when applied with a dc signal, it would take ages for the field to collapse, if it ever does that. by turning dc off and on again you wont induce any more energy to create a magnetic field, because its allready there.
This is exactly what is done in every switch mode power supply (computer PSU, cell phone charger; almost all PSUs you get nowadays are switch mode). It's called switch mode PSU, because the voltage to the primary of the transformer is switched on and off (no need to vary it; that would be much harder to do). +gamerpaddy Applying current only in one direction to the coil is no problem. Obviously you take a transformer core material that is not ferro magentic (not retaining magnetisation) and has as little magnetic hysteresis as possible.
Hi Bruce, what is the smallest esc circuit I can use for a 1000kv motor???? And how do I go from 3 phase to 2 phase so it can be powered through a Dc power supply???
This guys videos should be standard in elementary education. Give him 5 minutes to make a point, make a practical/applicable demonstration based on the point, take kids out to recess, send kids home to make something out of crap the find laying around the house to wow their parents and make homework anti-dreadful. Wash, rinse, repeat.
Great video even that I knew all the stuff you presented from 9th grade school , I enjoyed your video. Let's call this Electricity for dummies !!! All the best Bruce, from Romania !!! PS: I would not recommend you teaching people to play with microwave internals , they may get real hurt or electrocuted or even worst, killed. Maybe some theoretical stuff, yes is ok, but don't show them practical stuff, because majority of people are stupid and that stupidity will kill them. You may explain on the white board why you won't get a cancer when you head food in microwave or induction cookers, this will be useful for dummies.
Building a spot-welder from an old microwave is probably the least-dangerous thing you can do with such an appliance. Aside from the mains wiring, you're only dealing with a voltage of about 2 volts on the secondary.
+RCModelReviews It's safe when people know what they are doing. But when they don't and they think it's a good idea powering the transformer up before they removed the original secondary (or touch the high voltage capacitor shortly after they ran the microwave), it's getting dangerous. I'm very much on the side of let people be responsible for their own actions though. Tell them once what can harm/kill them. If they don't listen and do it anyway, well, that's a Darwin award then I guess. There's no excuse nowadays for messing around with stuff you don't understand anything about. The information (including warnings) is easily accessible on the internet for everyone.
hi bruce. why not to use just fully charged car battery for spot welding? just make an interrupting device limiting time of the weld... if you are not happy with 12v just make a transformer 12v to 2v or so...
Hey guys i have some problems with my racing quads: This is my first real racing quad and i fly rcx 2205 2633kv with xm20s, a gep 210 frame and a f3 racing board with Cleanflight I tryed out many pids and i dont know why but my quad is flipping and rolling very slow how can i make it roll/flipp faster? I fly for about 4 months now and try to do some tricks but with my PIDs it is not possible.
Is a 50Mhz Oscilloscope suitable for most things in a electronics lab, and doing communication engineering. I suppose you would end up with specialist equipment as you go.. Im going to start uni next year and will prob get a 100MHz 1Gs 4 channel rigol
Yes Bruce please do a video on making a spot welder from a microwave oven . There is a UA-cam channel called AvE who is trying to make a spot welder for welding Ni-cad and Nm-hd batteries for replacing old power tool batteries . Would the spot welder made from a microwave be able to do this ?? Check out AvE channel it might be of interest to you mate . All the best ......
It's pretty fundamental stuff but with an audience of unknown background it pays to assume nothing.
8 років тому
He's right. Many viewers of this channel are the young RC enthusiasts. The Kids. ;) Schools barely teach the youth of these days anything concrete and only the highest levels of schooling actually go into the details of electricity, magnetism, electromagnetics and so on. Many hams do not know what they wrote in the exams so no point in being blase. I know a few in my district. But if we're to go into the depths of things, we share the knowledge. From elementary to the quantum level of things. Best wishes and 73s de YO6IAL.
Depends on the wattage. As long as you use a transmitter with under 25mw you're okay. Anything stronger requires a ham license. Easy pesy (?) to get. Bruce has promised to do a video, but? A 25mw tx has enough strength for racing within say 300m. Any distance greater will require more wattage and a ham license.
So can o take tis advice when ordering a RC motor? like 28-12 and 12 being the nunber of turns per volt and that it will be fine on a 3s battery of have i missed something.. or im just talking shite at this point... lol back to school id say.
It can be used if you want to lower the CoG of the aircraft where the CoG is very high and reduce the keel effect, make the aircraft less stable in roll and therefore more manuvourable, or to cause inward spanwise airflow (under the wing)
All UK flyers the EASA through the CAA are lowering the maximum height restriction down to 50m. Seriously acro @50m this will kill the hobby and put small businesses out of business. The document is on there websites. We all need to act on this quick.
so if light is just a really high frequency magnetic field, than how come the inverse square law doesn't weaken it enough to make it invisible after a billion light years?
The inverse square law does apply to light and the only reason we can see light that has been traveling for a billion years is because it came from an incredibly high-powered source and we have incredibly sensitive telescopes.
It does. If it didn't, you wouldn't be able to see anything because you would be blinded by the light of all the stars in the sky. Draw a line going outwards from you in any direction, and you're almost certainly going to land on a star at some point. You might think you can see all the stars when you look up at the night sky, but you can't. Not even close.
Did you realise that the 50 or 60 Hz frequency is approx the same as your pulse and that is why is can fibrillate your heart and so not pump correctly.
I have to correct you Bruce, live in America, in Argentina more precisely and I have 220v @50Hz. I see you always do an extra effort to speak properly like when you say "ALUMINIUM" instead of "ALUMINUM", so referring to the United States as "America" is the same mistake.
I'm an engineer altough I did not learn anything new from the video (I wasn't expecting too, I was just curious) I find it well put togheter and easy for anyone to understand, good job.
Another great video!...you have such a natural ability to teach⚡️👍👍👍
As a newbie I really appreciated this video, thanks a lot for making it, and making it easy to understand.
Nooooo, just two videos, I was looking forward to following the rest of this playlist. Great clear videos, thanks
I love your channel. You are the most informative guy out there in this field. One question I have struggled with is the impact of SMA adapters and extensions on FPV signal quality. I have seen various "vigorous " discussions on the topic, but I have never seen anyone demonstrate the practical effects of adding adapters. I have had difficulty balancing the center of gravity on several quads, but I have always a been hesitant to use an extension for antenna placement. Similarly, on my goggles, an adapter would appear to give better positioning and focus, but I am worried about signal loss. I think you might be the only guy with the equipment and teaching ability to break it down for us. Hopefully you can cover this topic one day. Great channel. Love your work!
1/100ith of a second is called a "jiffy". In New Zealand, 1 AC cycle equals 2 jiffies. Marvelous video Bruce! Ones knowledge should be imparted. Cudoes! Keep up the tutorials.
I would like to say thank you very much for this video, you have explained it really well and i actually get it now. I love your vids and will continue to learn from them. keep up the good work. Thanks again Bruce. Cheers Dan
That's a great applied physics class. If one kid starts to like physics because of the hobby, that was a time well spent. Big fan of your channel. Keep'em coming!
You're brilliant! Really nice explanations that combine the science with the every-day applications!
Your educational videos are truly inspirational. You have an amazing ability to transfer knowledge in a concise and interesting way. Please continue with this series.
Thank you so much Bruce. I am sure these video's take a bit more effort to make with different shots, editing etc. I appreciate it and enjoy the education.
Excellent explanation here. You have shed light on this topic for me.
Good video Bruce. thanks for taking the time.
FYI. It is 60Hz in Saudi Arabia as well. 130V Line to neutral at consumer level. The reason is that the first generators were imported from the US and it connects to UAE and other nag boring countries through High voltage DC as they are all 50Hz.
I know this simplified explanation well help many, good stuff
I thought you said these had been pre filmed...haven't seen a new one in weeks really loving this series so hope you carry one with it.
I am a complete newbie to this subject. Thanks for educating us!!! Great job, keep it up!
Awesome video. I love learning fundamentals great subject choice and I just want to say you have a talent for teaching.
Well done Bruce. I really enjoy your tutorials. And look forward to more like this.
Excellent video Bruce, please keep these coming.
Excelente vídeo Bruce,
And although there is tons of videos explaining how to do that spot welder stuff please do one too.... you can make it look so much easier and it would help a lot of people... including myself
Thaks
Great to see you continuing to give back to the hobby & share this in a very easy-to-understand approach for everyone.
My young boys are also able to learn as you go too :)
Thanks Bruce. This makes sense to me now. Looking forward to your next tutorial.
Great video. I'm looking forward to the other training videos
videos are really helpful. would be really greatful if you did a microwave spot welder. i am working on a electric skateboard and was thinking about making my own lithium ion battery pack for it. your videos are always clear and knowledge you give is safe. this would help me make something that was usable and not just a hack. thanks from the other side of the pond.
Hey thanks for putting these together - this is really awesome information for an electronics newbie like me! Looking forward to your next videos!
this is why I follow your channel. sure, the reviews are very interesting but let's be honest, I won't buy even 5% of what you show. this lessons on the other hand are really well made and educational. thanks for these and thanks you exist :)
Thank you Bruce. You are a great teacher.
Absolutely loved this video! Great work mate.
Great explanation, Bruce.
I wish you’d been my teacher. Please do continue with the series, if you’ve got the time. Thanks!
You had 101 thumbs up there Bruce and I just made it 102, so I look forward to more advanced work. Really liked this vid but I'm not coming from a completely newbie base on the subject and look forward to the rest and will look forward to getting my HAM licence. In Oz, they just (CASA) put in a 120m height and 5.3 Km airport barrier. That really sux from my point of view...
Hi Bruce, thanks for taking the time to make these educational videos, they are invaluable. Special request - could you, at some point, do one explaining how induction in brushless motors works? In particular, back emf and flyback diodes vs active freewheeling, and active/regenerative braking. I've been trying to find out how these things work at the electronics level but to no avail! I'd be very grateful if you could explain it in layman's terms! Thanks, Alastair
Great stuff, Bruce. I really wish we'd had you back in the day when it was just Grob, Malvino, and lackluster instructors - would have made grasping theory a whole lot easier ; )
I wish I had someone like you as a teacher at school
Thank you som much for the explaination! You are great at explaining this in a understandable way! :)
Also, please add all the videos about basic electronics to your "Electronics 101" playlist. Since you have so many videos it was hard to find the ones I was interested in, and hard to know if you have more videos on this topic without going through lots of videos. The Ohm's law video for example is missing in that playlist.
Excellent stuff. Thanks for this series, cant wait future episodes.
Why isn't it possible to achieve the same effect with DC, varying the voltage from 0 to x volts at high frequency instead of an AC current ?
most materials used in transformers keep their magnetic polarity when applied with a dc signal, it would take ages for the field to collapse, if it ever does that. by turning dc off and on again you wont induce any more energy to create a magnetic field, because its allready there.
This is exactly what is done in every switch mode power supply (computer PSU, cell phone charger; almost all PSUs you get nowadays are switch mode). It's called switch mode PSU, because the voltage to the primary of the transformer is switched on and off (no need to vary it; that would be much harder to do).
+gamerpaddy
Applying current only in one direction to the coil is no problem. Obviously you take a transformer core material that is not ferro magentic (not retaining magnetisation) and has as little magnetic hysteresis as possible.
Thanks guys for clarification !
Great content, explained perfectly
Great video, thanks, Bruce
Excellent! Keep making more.
So does this mean that rc transmitters have some kind of converter in them, to convert the dc from the batteries to ac for the antenna?
Yep.
Good job Bruce!
Rich.
Cant wait for spot welder video!
Very interesting Bruce
great video serie, thanks
Thanks Bruce, that was great👍
Super usefull video.Thanks.
Bruce, excellent presentation. Two questions what produces the AC current in the radio transmitter and what is used as the filter(s) in the receiver?
Hi Bruce, what is the smallest esc circuit I can use for a 1000kv motor???? And how do I go from 3 phase to 2 phase so it can be powered through a Dc power supply???
Bruce !!!! you rock !!!!
Love it keep them coming!
Thanks Bruce.
Been waiting for this! Come fly Bruce, private property no one to tell you off
This guys videos should be standard in elementary education. Give him 5 minutes to make a point, make a practical/applicable demonstration based on the point, take kids out to recess, send kids home to make something out of crap the find laying around the house to wow their parents and make homework anti-dreadful. Wash, rinse, repeat.
Great video :) thank you.
Great video even that I knew all the stuff you presented from 9th grade school , I enjoyed your video. Let's call this Electricity for dummies !!!
All the best Bruce, from Romania !!!
PS: I would not recommend you teaching people to play with microwave internals , they may get real hurt or electrocuted or even worst, killed. Maybe some theoretical stuff, yes is ok, but don't show them practical stuff, because majority of people are stupid and that stupidity will kill them.
You may explain on the white board why you won't get a cancer when you head food in microwave or induction cookers, this will be useful for dummies.
Building a spot-welder from an old microwave is probably the least-dangerous thing you can do with such an appliance. Aside from the mains wiring, you're only dealing with a voltage of about 2 volts on the secondary.
+RCModelReviews
It's safe when people know what they are doing. But when they don't and they think it's a good idea powering the transformer up before they removed the original secondary (or touch the high voltage capacitor shortly after they ran the microwave), it's getting dangerous.
I'm very much on the side of let people be responsible for their own actions though. Tell them once what can harm/kill them. If they don't listen and do it anyway, well, that's a Darwin award then I guess. There's no excuse nowadays for messing around with stuff you don't understand anything about. The information (including warnings) is easily accessible on the internet for everyone.
Wow, incredibly useful and interesting as well! Thanks! Could I ask what is your background?
hi bruce. why not to use just fully charged car battery for spot welding? just make an interrupting device limiting time of the weld... if you are not happy with 12v just make a transformer 12v to 2v or so...
Hi Bruce, How much relative ground do you need for a circuit to move electrons?
If i built a transmitter with antennas for the frequency of light, will it produce visible light?
Hey guys i have some problems with my racing quads:
This is my first real racing quad and i fly rcx 2205 2633kv with xm20s, a gep 210 frame and a f3 racing board with Cleanflight
I tryed out many pids and i dont know why but my quad is flipping and rolling very slow how can i make it roll/flipp faster?
I fly for about 4 months now and try to do some tricks but with my PIDs it is not possible.
Is a 50Mhz Oscilloscope suitable for most things in a electronics lab, and doing communication engineering. I suppose you would end up with specialist equipment as you go.. Im going to start uni next year and will prob get a 100MHz 1Gs 4 channel rigol
Great Videos! Was wondering is it possible to test a Electronic Speed Controller using a Watt Meter?
Hello Sir,
I have a question. Do you own any hobbywing V4 platinum ESCs?
Opa amigo você já testou o wolfbox 1w 433mhz ?
Good video. I can't see a Patreon link in the description.
www.patreon.com/user?u=2951605
Thanks Bruce :)
Yes Bruce please do a video on making a spot welder from a microwave oven . There is a UA-cam channel called AvE who is trying to make a spot welder for welding Ni-cad and Nm-hd batteries for replacing old power tool batteries . Would the spot welder made from a microwave be able to do this ?? Check out AvE channel it might be of interest to you mate . All the best ......
wow! Shocking information. Thanks for enlightning me!
By the way, are you a ham radio operator?
Jim, N5QL
It's pretty fundamental stuff but with an audience of unknown background it pays to assume nothing.
He's right. Many viewers of this channel are the young RC enthusiasts. The Kids. ;)
Schools barely teach the youth of these days anything concrete and only the highest levels of schooling actually go into the details of electricity, magnetism, electromagnetics and so on.
Many hams do not know what they wrote in the exams so no point in being blase. I know a few in my district. But if we're to go into the depths of things, we share the knowledge. From elementary to the quantum level of things.
Best wishes and 73s de YO6IAL.
I'm not young anymore, but being mostly self taught, I often find odd holes in my knowledge. These videos are a big help.
Ming Mongo same here; I'm trying to learn instrument megnetic pickups as well as other electronics; just a hobby at this point but this is nice
Thank you
nice, more please
Bruce. Do you know if 5.8gHz video transmission requires a ham license in the U.S.?
it most definitely doesn't.
Depends on the wattage.
As long as you use a transmitter with under 25mw you're okay.
Anything stronger requires a ham license. Easy pesy (?) to get.
Bruce has promised to do a video, but?
A 25mw tx has enough strength for racing within say 300m.
Any distance greater will require more wattage and a ham license.
Well, it pays to listen to the entire video.
Pay attention to what Bruce is saying and you'll be able to ace your Ham license test!
So can o take tis advice when ordering a RC motor? like 28-12 and 12 being the nunber of turns per volt and that it will be fine on a 3s battery of have i missed something.. or im just talking shite at this point... lol back to school id say.
Very interesting
one more thing. another interesting topic would be what are the benefits of dihedral/anhedral and why would anyone choose anhedral :)
It can be used if you want to lower the CoG of the aircraft where the CoG is very high and reduce the keel effect, make the aircraft less stable in roll and therefore more manuvourable, or to cause inward spanwise airflow (under the wing)
really good video, I would like to see more on this subject. could send me some more links on this pleas :) thanks
can you please make a video on radio frequency?
Why does 5.8 not go as far as the rc link 2.4?
Please make more videos.
Some says people died on this channel waiting for follow-up videos...
All UK flyers the EASA through the CAA are lowering the maximum height restriction down to 50m. Seriously acro @50m this will kill the hobby and put small businesses out of business. The document is on there websites. We all need to act on this quick.
You could've put a link up...
I`m a student in electronics/radio comunications. If it weren't for you, I`d never really understand all the fuss about magnetism and transformers.
So is this the concept in how a solar panel works then?
Solar panels are different in concept. They convert light to DC current through their semi conductors. Bruce was talking about electromagnetism.
so if light is just a really high frequency magnetic field, than how come the inverse square law doesn't weaken it enough to make it invisible after a billion light years?
The inverse square law does apply to light and the only reason we can see light that has been traveling for a billion years is because it came from an incredibly high-powered source and we have incredibly sensitive telescopes.
It does. If it didn't, you wouldn't be able to see anything because you would be blinded by the light of all the stars in the sky.
Draw a line going outwards from you in any direction, and you're almost certainly going to land on a star at some point. You might think you can see all the stars when you look up at the night sky, but you can't. Not even close.
check your insurance before advising experimenting on microwave internals.
Bruce was mentioning using the transformer from a microwave and changing the turns count to produce larger currents.
They are good at killing people.
We who grew up with 240 volt mains differ from those unlucky 120 volter. You only make that mistake once.
Did you realise that the 50 or 60 Hz frequency is approx the same as your pulse and that is why is can fibrillate your heart and so not pump correctly.
If you've got a pulse of 50Hz - you're already in deep trouble
Taikorea
that how they make... wireless charger
Without >> Whom
I have to correct you Bruce, live in America, in Argentina more precisely and I have 220v @50Hz. I see you always do an extra effort to speak properly like when you say "ALUMINIUM" instead of "ALUMINUM", so referring to the United States as "America" is the same mistake.
Need to be a bit careful with volts and amps units Bruce, you dont have volts of current.