WHAT IS THE DEVICE DESIGNATED d882 I LEFT MY ONE OFF WITH THE IDEA TO PUT IT ON A SEPARATE HEAT SINK , BUT I HAVE NOW LOST IT AND THE PSU IS COMPLETED WITHOUT D882. CAN YOU PROVIDE ANY DETAILS PLEASE. MoK
My TL081s do not have the notch that is shown on the pc board. There is in fact a small circle molded into the top of the IC package, I am assuming that this circle indicates the SAME END OF THE PACKAGE THAT THE NOTCH DOES. AM I CORRECT?
I have built a number of these kits but now I'm trying to wire an ebay special amp/volt meter but I dont know where to wore the large red wire from the current . I'm using a 24 vac transform step down from 110ac can you help with possibly a schematic showing the power supply as I'm not very fluent with wiring schematics. I am teaching myself these thing via youtube lol
sometimes i need to power led/bulb and they mainly consume 4 amp and I want to give some headroom so 5amp with current limit is my need & i hope you can find something to help me out & thx for the videos & reply keep it up.
Electronic projects This power supply and any power supply is going to be limited by it's weakest component. So beefing up one component will not reliably beef up the whole. You could however run 2 of these in parallel for 6A overhead.
gartmorn If n = the number of pieces of electronic gear you own at present. Then the correct number of pieces of electronic gear you should own is always n+1.
George Chambers no new iron, that's the same one from my Cheapest Chinese Soldering Station video. Lol I think the Bridgeport might be a little overkill.
A Bridgeport is never overkilling! I use my milling machine for cutting project boxes every time, You can't beat the precision with much else. However you go about it I'm sure it will be nicely done.
I've had the best luck with 2 flute endmills. A slow feed, not too slow, and a medium RPM works for me. Watch for the plastic melting and not getting chips. Good luck!
lorenzo.pilastro Thank you, I'm glad you like the videos. While I have not used that particular buck converter myself, I've seen a review of it (Julien Illet maybe) and it seems to be good quality.
This circuit and kit is based on a very old design and has many issues, So It always ends in frustration and disappointment, as shown in many forums, So if you want a good Lab power supply then don't waste your time. I say look elsewhere. Period.
WHAT IS THE DEVICE DESIGNATED d882 I LEFT MY ONE OFF WITH THE IDEA TO PUT IT ON A SEPARATE HEAT SINK , BUT I HAVE NOW LOST IT AND THE PSU IS COMPLETED WITHOUT D882. CAN YOU PROVIDE ANY DETAILS PLEASE. MoK
Great vid! Do you know of a kitthat is available for a bigger power supply let's say 10 to 15 volts 10 amps?
My TL081s do not have the notch that is shown on the pc board.
There is in fact a small circle molded into the top of the IC package, I am assuming that this circle indicates the SAME END OF THE PACKAGE THAT THE NOTCH DOES.
AM I CORRECT?
Hello.. May I ask how did you fix the -0.5v problem at 9.30time?
Use the small 10 turn pot to adjust to zero volts with V pot turned all the way down.
I have built a number of these kits but now I'm trying to wire an ebay special amp/volt meter but I dont know where to wore the large red wire from the current . I'm using a 24 vac transform step down from 110ac can you help with possibly a schematic showing the power supply as I'm not very fluent with wiring schematics. I am teaching myself these thing via youtube lol
Hi, i have the same kit with same problem how did you fix the problem at 9.30 time ? plz reply.
I am desperately searching for part 2… Can anyone direct me?
will we able to increase the current capabilitie of this power supply by adding another transistor in parallel with the power transistor?
I haven't looked into that. This is a 3A PSU plenty of power for anything you would want to do at home.
sometimes i need to power led/bulb and they mainly consume 4 amp and I want to give some headroom so 5amp with current limit is my need & i hope you can find something to help me out & thx for the videos & reply keep it up.
Electronic projects This power supply and any power supply is going to be limited by it's weakest component. So beefing up one component will not reliably beef up the whole. You could however run 2 of these in parallel for 6A overhead.
Ok I understand Thx..
Hey i made my own power supply plz watch
ruclips.net/video/Q6FsiVGuTIM/видео.html
Cómo podemos liberar la maxima corriente ?
My power supply stuck to 23.8 v rather than going upto 30 v.. what to do ?
I did this project, but I can not get more than 1.5A with a 3Amp transformer
Sooo how did you fix the negative 0.5 voltage reading, and how did you make your led turn off? Mine is constantly on and i can't find the reason
U need to use a center tap transformer! It is a must! It needs -v to make it go to 0v .
Thanks man , how is the magnifier @ 3:00 and from where you bought it ?
jrom hek hi there, it's a 4x magnifier from Harbor Freight. It helps my old eyes ☺
Thanks a lot for your fast reply .
what's the function of the 10 turn pot??
my project box is sorta like yours, but its matte
can i use my laptop adaptor around 19volts instead of transformer?
No, you can't. Because your laptop adaptor gives you 19v direct current, and you need 24v ac current.
Good little project. I would love to win it but I fear I may become, to power supplies, what you are to function generators!
gartmorn If n = the number of pieces of electronic gear you own at present. Then the correct number of pieces of electronic gear you should own is always n+1.
learnelectronics afraid I'm addicted to internet shopping for all things electronic!
The LED is the constant current indicator. When it's on, your in constant current mode.
Robert Gibbons Robert, I'm going to have to put you on retainer.
Warning, I don't come cheap! ;-)
The good ones never do!
How you activate the constant current mode buddy ?
Built a Heath kit 101 SSB transmitter... Never did get it to work! LOL...
Looks like you got a new Hakko soldering iron? Good build are you going to use the machine shop to cut the holes in the project box?
George Chambers no new iron, that's the same one from my Cheapest Chinese Soldering Station video. Lol I think the Bridgeport might be a little overkill.
A Bridgeport is never overkilling! I use my milling machine for cutting project boxes every time, You can't beat the precision with much else. However you go about it I'm sure it will be nicely done.
OK, you sold me on using the bridgeport. What cuts plastic better 2 or 4 flute endmill?
I've had the best luck with 2 flute endmills. A slow feed, not too slow, and a medium RPM works for me. Watch for the plastic melting and not getting chips. Good luck!
post the link here?
Here is good!
you saw nothing
wait,should i just post the link
Thanks for the videos, I like them. Especially when you pull out pen and paper :D :D
Have you ever tried banggood power supply ID 1038740?
lorenzo.pilastro Thank you, I'm glad you like the videos. While I have not used that particular buck converter myself, I've seen a review of it (Julien Illet maybe) and it seems to be good quality.
Get yourself some "Blu tack" to hold those pesky components in place
Holf your components in place with blutack. Makes it easier
I was being lazy lol
U must need to have centre tap transformer . Like 30-0-30.
Bad PCB design putting the two pots so close together.
Moonbrony I agree. They will be relocated when this goes in the project box.
They give you connectors to mount on the board and leads to remote the pots.
If only they gave a schematic...
From our friends at Banggood: img.banggood.com/file/products/201505080459530-30Vinstall.pdf
and i just uninstalled a social media i could have posted it... so google + it is
This circuit and kit is based on a very old design and has many issues, So It always ends in frustration and disappointment, as shown in many forums, So if you want a good Lab power supply then don't waste your time. I say look elsewhere. Period.