Basic electronics barrel plug polarity multimeter testing bonus how to DIY learning lesson

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31 июл 2024

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Комментарии : 40

@THX11380 10 дней назад

I am not polarized about this video at all I had a barrel of fun watching it and I think it was great you obviously are a very intelligent individual and an excellent teacher I am bowing down in respect. ❤❤❤

@Electronzap 10 дней назад

Thanks for watching!

@RyanBancroft 2 года назад

Hugely helpful, thank you! I needed to know how to measure barrel connectors, and this got right to the point and showed it both ways. Very much appreciate you.

@Electronzap 2 года назад

Glad you enjoyed, thanks for watching!

@Electronzap Год назад

Donate to www.patreon.com/electronzap This playlist ru-vid.com/group/PLsAJMThMEUtr8yht55dgmA2TON8NfqaYH List of my videos ru-vid.comvideos www.amazon.com/shop/electronzapdotcom As an Amazon Associate I earn from qualifying purchases. Americans should check out one or more of those links before making any purchases. There's no extra cost to you. electronzap.com/ www.reddit.com/r/ElectronicsStudy/

@utkf16 3 года назад

Useful information, and a belated Happy New Year Paul

@Electronzap 3 года назад

Thanks, happy New Year!

@dovetomarc Год назад

Thanks for the video. One comment for safety sake you should always put the positive probe in first. Positive probe should be removed last.

@Electronzap Год назад

Thanks for the tip!

@jp040759 3 года назад

Great tip for newbies. I have gotten many things to repair that folks have plugged in adaptor with wrong polarity and blew the crap out the guts. 90% of the time item's is beyond repair.

@Electronzap 3 года назад

That's a bummer! I haven't fried anything with reverse polarity yet, but I hear it's common.

@tonycarboni2002 2 года назад

why doesn't manufacturer prevent this completely with a 2 cent diode? That would safe-guard completely, right?

@jp040759 2 года назад

@@tonycarboni2002 Why do they care that you burn up your device. You buy a new one. They make more MONEY.

@mikebond6328 3 года назад

I super glued the input cable to my laptop power supply to keep it from constantly falling out.

@RuskyED 3 года назад

Отличный урок! Очень интересная информация!

@shadowpapito 2 года назад

Thank you, I truly appreciate it! Peace

@Electronzap 2 года назад

Thanks for watching!

@wheany 9 месяцев назад

This was very helpful. I have some power supplies that have the voltage and current marked on them, but not the polarity of the plug and I was trying to find a correct power supply. I wasn't sure if I could just put the probes on the connectors directly or if it would blow up the multimeter. Nice to know it doesn't (assuming i'm using high enough voltage range at least)

@Electronzap 9 месяцев назад

Glad it helped, thanks for watching!

@tonycarboni2002 2 года назад

I give thumbs up bc you sound like Norm MacDonald.

@Electronzap 2 года назад

Nice!

@crushingstrawberries2779 2 года назад

Thank you!

@Electronzap Год назад

Thanks for watching!

@cajunqueen5125 3 года назад

an awful lot (most?) of these barrels connectors in consumer electronics are center-positive; but one area that is over-whelming center-negative are the power supps for guitar effects pedals. I'm sure there's some reason for that, but don't feel confident re: what it might be. VERY helpful video; thanks for posting this. :)

@tonycarboni2002 2 года назад

This is good question bc I notice that too. Can someone answer? Norm?

@paulmacgiollacaoine8619 3 года назад

Happy new year :)

@Electronzap 3 года назад

Happy New Year!

@SunAndMirror 2 года назад

got a question. how come you dont get zapped when touching the outside of the (negative in this case)barrel of the plug? always wondered why most dc plugs have a few MM exposed barrel when fully plugged in, how is that safe?

@Electronzap 2 года назад

You shouldn't feel anything if you touch both terminals of a power source that is well below 50 volts under normal conditions. Often the ground (negative) terminal is exposed because lots of things tend to share the same ground, so it is made easy to connect to. Only a proper load should also connect to the positive supply terminal. The biggest risk is metal touching both terminals at the same time (short circuit). Which can cause burns or injuries due to flying metal if it explodes.

@roadtonever 9 месяцев назад

Why is my AC adapter barrel still positive when I reverse the red and black probes?

@Electronzap 9 месяцев назад

I don't know. If you switch the red and black probe measuring positions, then a positive voltage should show as negative or a negative voltage should show as positive.

@roadtonever 9 месяцев назад

@@ElectronzapMy bad it was an AC-AC adapter.

@Electronzap 9 месяцев назад

@@roadtonever oh, that makes sense then.