It is a power supply circuit that can adjust the output voltage or current. But it still has the same characteristics as a fixed regulated circuit. It will keep a stable voltage when it has any load.
Start with: Top variable power supply circuit list
Let’s build an adjustable dual power supply circuit using a 7805 and a 7905 IC. The output can be adjusted from +5V to +25V and -5V to -25V at 1A. It is also a great way to understand the basics of OP-AMP circuits. Read more
In a normal circuit, the general LM350 regulator has a start voltage of 1.25V. But this circuit is special that start of 0-volts. We use only one IC and a few other components. So cheap and easy for you. Read more
Let’s create a 0-30V 3A Laboratory DC Power Supply. High efficiency variable regulator that new circuit design using UA723 and TIP3055 Read more
Here is Ham radio power supply circuit using LM350T x4 in parallel for Amateur radio CB/RF/VHF. The output is 13.8V at 10A current. It is good circuit with PCB low noise RFI elimination. Read more
If you want to a LM338 variable dc voltage power supply circuit during 1.2V to 30Vdc and can provide a current maximum to 5A. Read more