#1:3 0-30V 2mA - 3A Adjustable DC Regulated Power Supply DIY Kit - Part 3 Mods 

This is the best video on that kit that I've seen, good work. I only need a 12V PS so I'm using a 16.7V AC transformer. I only have a 12V fan so if I keep the 7824 would it put out a lower voltage because of the smaller 16.7V PS, and is it ok to run it like that. I'm using a failed ATX PS as the case and throwing away the failed switching PS circuit board, so that all it has is box, a 12V fan, and input filter - 0.47uF cap and inductor -, that is connected directly to the 240V input socket inside the case. Is it ok to keep this filter or should I throw it out as well. Thanks

thanks! Maybe you could add a video of that as another compent added. JW

If we add another similar output transistors (ex.Q5/Q6/Q7..)in parallel with Q4, so that the bases of both transistors should be joined together, the collectors of the transistors should be joined together, and from emitters of each transistor to the output positive teminal should be add one resistor 0.22 ohm / 3-5W, in order to balance the power load of the four parallel connected output transistors Q4 and Q5/Q6/Q7.Does it possible to work for output current 10 Amps ??? Or must be some mod on current limit circuit ?? *of course the TR-secondary .gives 22-24Vac 10-12 Amps, & the filter caps are be 10.000 μF+ thanks

Hi, why are you only getting 24V DV output?

Any idea what you think might be wrong if my current limiting feature stops working? I know the is good, i've been going through the board trying to make sure each component is good / not bust.

can I build more of these and put them in series or parallel? to get like 60v or 6a? best regards

You don't need the 7805 regulator! The resistor value would need to increase if you use 24v, but the power will be the same. LED must be current limited not voltage limited (within reason).

Hello friend, I was wondering if you could explaine how I should connect my little volt/amp display to pcb. I did connect the volt display and I see the variable voltage. But I am not sure how to connect the amp display to see the current state. Any help would be appreciated. Thanks JW

Hey, I have this same power supply however I have some issues with it, the constant current light is always on, you showed that yours is working, what could cause it to not operate properly? I've seen other videos too and it's sort of hit or miss whether or not the CC light works well or not.

If i understand corectlly, this circuit Power supply don't have short circuit protection, if accidentally touch plus ➕ and ➖, at the output!? How i ca-n do to add some components to achieve short protection!?