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0-30V Laboratory Power Supply
- Arief Laksono
- theripper555_96@ymail.com
- 209.987 Views
- medium
- Tested
- 3 Likes
This project is based on the 0-30 VDC Stabilized Power Supply with Current Control 0.002-3 A and a new PCB layout is introduced here. It’s a stabilized power supply with variable output voltage in the range 0-30Vdc (33Vdc peak) – and variable current 3A and is ideal for your laboratory power supply.
Description
Schematic and PCB are designed in Eagle software and the source files are available on the links at the bottom of the page. The PCB design has connectors for 2N3055 transistor, input and output voltage. Also on-board potentiometers are added.
Schematic
Photos
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PCB
Actually that PS is NOT that bad, it is just old design and fully good for home lab.
Sorry, typing too fast :(.
where to place 2n3055 its outside the layout
2N3055 is placed out of the board and mounted on a heatsink as you can see on the photo.
Will this circuit work as i am seeing many negative comments for the loaded pcb design and components…actualy i bought the components and is in dilemma to proceed or not…
Sir, may you awnser my question ? I have a doubt. I assembly the other one, the one you based this project. And as long if I got original components, it worked fine for me. Until one day I let the power supply conected over night, with no load, so the peak voltage on the filter capacitor increased and burn it. And this problem repeats once more. Your power supply may suffer the same problem ? Also din’t find the tl081p TL081 is ok ?
The 2n2219 is not available in my area. What else I can use?
You can replace it with a 2n2222, no additional changes necessary
hello everybody
please, this PS is correct or no?
This is a good instruction. I am just a newbie, and i want to build this project. I just want to use it as my own (not hard use). So will it work perfectly? I just use it for my lab
Hello . I need set current from 0 to 5 Amp . How i can change circuit to do this ?
Hello, Thanks by your work. May I use other type of AOs like LM358?, I have some of them and I like to use them in a power source like this.
LM358 have maximum input voltage 32V, in this power supply you need to use an OPAMP with at least 40-42V maximum voltage.
hi sir. i have 2 Q
1(Important)-how can i upgrade it to 0-30V 0-5A ?
i used a 5A Transforme but the current is limited on 3A and i can not use more than 3A ?
2(Non-Important)- how can i add FINE Volume side of this 2 volumes?
Thanks
im still waiting for my answers 🙁
HLP PLZ
5 years ago… and nobody answered. I have one to the second question: use two potentiometers in series instead of one with two other resistances. It is necessary, the two potmeters resistance have to be close as possible to the original value. 27k~24k+2.2k or something like this. The smaller one will be the fine, the bigger will be the corsare.
Yes, you are right. If possible use the same value potentiometers as in the schematic.
hi can i make a negative supply out of this..
Swap the leads
what are the correct values for this project and does it work properly
I use 18 volt 2.5 ampere transformer use circuit working good if i use 32 volt 2.5 ampere transformer u3 overheat and circuit not working plz solve my problem
the list of components is not listed
It’s not available at the moment, but you can open the Eagle schematic and locate the required components.
1N5402
1N5402
1N5402
1N5402
1N4148
1N4148
1N4148
1N4148
1N4001
5V6
5V6
10KOhm W
10KOhm W
10KOhm W
10KOhm W
10KOhm W
56KOhm W
56KOhm W
27KOhm W
27KOhm W
1KOhm W
1KOhm W
2K2Ohm W
2K2Ohm W
82Ohm W
220Ohm W
3K9Ohm W
270KOhm W
1,5KOhm W
4,7KOhm W
33Ohm W
2,2K 1W
0.47Ohm 5W
10K
10K
100K
47 F/50v
3300 F/50v
47 F/50v
10 F/50v
100 pF Ceramic
330pF Ceramic
100 nF Polyester
200 nF Polyester
100 pF Ceramic
2N3055
2N2219
BC557
BC548/547
TL081P
TL081P
TL081P
Hi and thanks for this project.
Yet when I run the pcb-code, the eagle.exe crashes.
First I thought it was the extra transistor Q4 from the board, since
it complaint about airwires.
From eagle manual 8.8 I defined an attribute _external_ and
was able to remove the Q4 from the board editor. But this did not
stop the crashing.
Any ideas?
thanks!
Sir could you please send me the components value
These are marked on the Eagle schematic file.
sir can I use UA 741 instead of TLO 81 because TLO 81 is not available
Thank you