Cool board, maybe version 2 could have all the different connectors as well the led's to show centre negative/positive as well as having a numerical display to show the voltage. This way you get all the information you need from any ACDC plug you will ever need. Thanks for another cool video Paul.
Nice simple circuit. The only change I might make would be to put both 5.5mm x 2.1mm and 2.5mm sockets (I don't know why both types were ever made), and maybe some other types of sockets.
Really useful tool, thanks Paul! Yes....and don't forget a lot of the older bench meters are center negative, also. Nearly got caught out there before, too! Always, always check! Thanks mate!
Lovely demonstration of a simple circuit and how to get a pcb made up. Years ago you could buy these from Maplin electronics here in the UK. I still have 2 of them. Very useful to have.
I think that it is a very interesting project! Probably, adding a bridge rectifier as someone suggested wouldn't work for the scope of this project. Great! I always appreciate your videos! 😌
IMO, center positive is more common, so maybe not only use a different color for center negative, but make that LED a self-flashing type, to make sure it comes to your attention.
Funny that you should mention it. I have a board that I have been working on that has this very setup on the power input (along with a mosfet to protect against reverse polarity). Lights are between jack and mosfet. I labeled them ON and FAULT. It never occurred to me to parlay that into a simple polarity tester. Sometimes the obvious and simple escapes me. Thanks, Paul for keeping me on my toes.
Do you know what search term is for that Power Jack on the PCB I have some that will fit that but I couldn't find that footprint and that's the one I'm looking for
Can you come up with a board that converts 3.3 DC to like 30,000volts DC a very compact board I'm making an ion lifter but need help with this it's a saucer laughable I know but it's coming along decent . Thanks for any input 😁👍🛸🤖
Maybe to add for a revision you could add 2 pads on either side of the jack, on connected to Center and the other connected to Barrel. That way you could verify any low voltage PS, even if there is no plug.
I can see where this is a must have if you have lots of different wall warts. most of mine are all the same so I don't have a use for it but for the folks that need such a thing this is a simple and effective tool... :-) Would be something cool to build and just have around... Thanks for the ideas... :-) Thanks for the video! LLAP
You don't have old eyes yet. I use cheaters and a magnifying glass. 😁 It seems back in the olden days before wall-warts most plugs were center negative, I still have some of that old stuff around. Slick little circuit, it should come in really handy on the bench. Thanks for the video!
@@learnelectronics ha ha, yeah :D Being into Flying RC planes Via FPV, ive made my fare share of magic smoke incidents during complex builds, not much fun when a flight controller goes up in smoke. Im dealing with smoke of a different kind in my car, i didnt think and reinforced the large resistors with epoxy on some crossovers i had to re solder all the joints on, i push so much power though them that the epoxy is burning off from the heat and it stinks! Should have used silicone :(
@@andymouse Yes, I have. He's taken the time to get on top of its limitations. I found it incredibly frustrating on the few times I used it - for JLCPCB SMT assembly using parts from LCSC. Being used to Eagle and Altium, it did some very strange things...
This circuit is not worth of mentioning. What will happen if you use high voltage power supply, current limiting resistor will blow up... Please use transistors to solve this problem. Do it right if you have to. 🧐
Did you even pay attention to the words i said at the very starr of the video? No? I didn't think so. THIS IS FOR WALL WARTS. Usually between 3 and 18V. If you try and plug in a high voltage supply, you deserve what you get.
@@learnelectronics Man, i really feel for you sometimes, Paul with these pricks making stupid comments! And the one thing they all have in common?: they have never made ONE friggin video to help anyone! Says it all, there. Keep yer chin up, mate!
Cool board, maybe version 2 could have all the different connectors as well the led's to show centre negative/positive as well as having a numerical display to show the voltage. This way you get all the information you need from any ACDC plug you will ever need.
Thanks for another cool video Paul.
I agree. I think the biggest issue would be not all power supplies will have the same size connector.
Nice simple circuit. The only change I might make would be to put both 5.5mm x 2.1mm and 2.5mm sockets (I don't know why both types were ever made), and maybe some other types of sockets.
If my old fart memory serves me correctly, the idea of the 2.5mm was its ability to carry more current
Not stupid if it solves the problem nicely and easily. Well done. Cheers from Brazil
I’ve never been this early so I just wanna say I really appreciate all the videos you make!
Thanks!
I use a white paint pen and label all my power supplies with voltage/polarity and what they go to.
Great little circuit board Paul. Thanks for sharing. #StaySafe
Really useful tool, thanks Paul! Yes....and don't forget a lot of the older bench meters are center negative, also. Nearly got caught out there before, too! Always, always check! Thanks mate!
Nice little device. I think a small volt meter would be a nice addition.
Cool little circuit ...
Like you I have a large collection of wallwart & elderly eyes ...
Will be very useful addition to any workbench ....
Lovely demonstration of a simple circuit and how to get a pcb made up. Years ago you could buy these from Maplin electronics here in the UK. I still have 2 of them. Very useful to have.
I think that it is a very interesting project! Probably, adding a bridge rectifier as someone suggested wouldn't work for the scope of this project.
Great! I always appreciate your videos! 😌
Always love the videos, no matter how simple or difficult.
I appreciate that!
Neat simple concept for a valid purpose. Liked listening to your story back in the day in CA also.
So how do I check what I'm going to charge for center pos or center neg?
IMO, center positive is more common, so maybe not only use a different color for center negative, but make that LED a self-flashing type, to make sure it comes to your attention.
Funny that you should mention it. I have a board that I have been working on that has this very setup on the power input (along with a mosfet to protect against reverse polarity). Lights are between jack and mosfet. I labeled them ON and FAULT. It never occurred to me to parlay that into a simple polarity tester. Sometimes the obvious and simple escapes me. Thanks, Paul for keeping me on my toes.
Do you know what search term is for that Power Jack on the PCB I have some that will fit that but I couldn't find that footprint and that's the one I'm looking for
2.1mm barrel jack
Can you come up with a board that converts 3.3 DC to like 30,000volts DC a very compact board I'm making an ion lifter but need help with this it's a saucer laughable I know but it's coming along decent . Thanks for any input 😁👍🛸🤖
Great video. What electronic software did you use to create your project.
Love it, nice little project to try to today.
What software do you use for Making PCBs? Looks easier than what im trying to use.
I know it was sponsored, but I would've thought about panelizing 4 boards in the 100x100 size... You'd have 30plus to give away.
Maybe to add for a revision you could add 2 pads on either side of the jack, on connected to Center and the other connected to Barrel. That way you could verify any low voltage PS, even if there is no plug.
Where did u get the pcb stand from ?. Pretty cool
Amazon, and yes, they are great!
I can see where this is a must have if you have lots of different wall warts. most of mine are all the same so I don't have a use for it but for the folks that need such a thing this is a simple and effective tool... :-)
Would be something cool to build and just have around... Thanks for the ideas... :-)
Thanks for the video!
LLAP
It works! Simple.
Now, let's really engineer it up and install multiple different sized jack's.
Maybe
volt & amp meter might be a good addition
Cool. Simple designs are still cool!
You could use a bicolor led less parts
Cool little project. Thank you. What software r you using in this video to develop your projects?
Looks like EasyEDA.
You don't have old eyes yet. I use cheaters and a magnifying glass. 😁 It seems back in the olden days before wall-warts most plugs were center negative, I still have some of that old stuff around. Slick little circuit, it should come in really handy on the bench. Thanks for the video!
love your work and that is a great idear :)
Sweet. Nice project.
Simple yes but very cool and idiot-proof. Thanks, Paul.
This would be really useful on the bench. I believe some retro 8 bit computers have centre negative supplies but don't quote me on that!
Simple. Very handy.
magic smoke is a good indication of polarity :)
Hmm? Often is the final indication
@@learnelectronics ha ha, yeah :D
Being into Flying RC planes Via FPV, ive made my fare share of magic smoke incidents during complex builds, not much fun when a flight controller goes up in smoke.
Im dealing with smoke of a different kind in my car, i didnt think and reinforced the large resistors with epoxy on some crossovers i had to re solder all the joints on, i push so much power though them that the epoxy is burning off from the heat and it stinks!
Should have used silicone :(
Oh... but positive should be red, for consistency, and the negative blue or blacklight :-)
Why so big?
Add a bridge rectifier and volt meter.
2x2,200 ohm resistors in parallel =1,100 ohms
Also, if you have an AC wart, both lamps should light...
Correct
This could be a lot smaller if built without a pcb
Then how are you going to pick it up? Keep track of it? Replace components? Hmmm?
Good vid!
...and if it outputs AC?! Guess we get both lights.
Correct
i just use the meter, but you cant fit one in your condom pocket, sooo. its a winner!!
Id say I have 3/4 gazillion at least...
I think these videos serve to show how bad EasyEDA really is...
Duncan...piss off
@@learnelectronics Abuse from the content creator towards a simple observation. I think that says much more about you than it does about me...
@@andymouse Yes, I have. He's taken the time to get on top of its limitations.
I found it incredibly frustrating on the few times I used it - for JLCPCB SMT assembly using parts from LCSC.
Being used to Eagle and Altium, it did some very strange things...
This circuit is not worth of mentioning. What will happen if you use high voltage power supply, current limiting resistor will blow up... Please use transistors to solve this problem. Do it right if you have to. 🧐
Did you even pay attention to the words i said at the very starr of the video? No? I didn't think so. THIS IS FOR WALL WARTS. Usually between 3 and 18V.
If you try and plug in a high voltage supply, you deserve what you get.
@@learnelectronics what if i hook it right to the wall outlet? Will it blink back and forth really fast for two seconds and then explode?
@@learnelectronics You are learning electronics 😀
@@learnelectronics Man, i really feel for you sometimes, Paul with these pricks making stupid comments! And the one thing they all have in common?: they have never made ONE friggin video to help anyone! Says it all, there. Keep yer chin up, mate!