Creating an Adjustable LM324 Power Supply

The need for varying voltages when testing a circuit is very necessary for that I try to make a power supply circuit whose output can be adjusted to vary according to the needs needed. The scheme I tried is an adjustable power supply scheme or a variable power supply scheme that uses the main component in the form of the LM324 quad opamp IC, this quad opamp ic is used as a unit ranging from oscillators to comparisons for voltage and current. I have previously made this series of adjustable power supply LM324 using a pcb that is printed by myself and I have used it, the article can be seen in the tautan ini and this is what the PCB layout and implementation looks like.

Layout Adjustable Power Supply LM324

Hasil akhir Adjustable Power Supply LM324

Adjustable Power Supply LM324 final result

Here I show the scheme that I use for the purposes of making the PCB layout.

Skema Adjustable Power Supply LM324

Because the Adjustable Power Supply LM324 series has proven useful and I have long used it for daily purposes, I tried to recreate the layout but using a quarter-watt resistor and the layout is rearranged more compactly so as to reduce the dimensions of the pcb to be smaller and in addition, the addition of a potentiometer for the regulation of the output voltage into two, namely for the regulation of the coarse voltage (Coarse) whose movement of the voltage is rough or large which when rotated shifts the volt count and for the soft voltage setting (Fine) which when rotated shifts the count below one volt so it is very suitable when you want the right voltage as desired.

Now after finishing creating the new layout, then the layout is converted to a gerber file so that it can be printed to the site PCBWay.com because only with a printing cost of 5 dollars we can get 5 to 10 pcs of PCBs with quality which is certainly super cool, besides that if we have never ordered a pcb and do not have a PCBWay account then when registering for an account for the first time we will get a welcome bonus balance of 5 dollars for printing costs, how interesting is it, right? Please register for a PCBWay account right now via tautan ini.

PCBWay.com

For gerber file of the adjustable circuit of the LM324 power supply, you can also download it or print it directly on the PCBWay site at the following link.

After I received the PCB about a week after ordering, then I started to assemble it to completion and then tried it with the results that were as expected, below I show you from the unassembled PCB to the finished circuit filled with components.