Why use the 78xx voltage regulator? When our electronic projects require a fixed regulated DC power supply circuit.

For long times ago. I often use a Zener diode and transistor to build a regulator. They are good but have many parts.

So, now the first choice, we recommend using IC (the integrated circuit in the 78xx family).

They can be a fixed regulated power supply source. They give output voltage: 5V, 6V, 9V, 10V, 12V, 15V, 18V, 24V at 1.5A max current.

It is easy to use, cheap, popular for a long time.

Parts used in this below circuits are easily available in most of the local markets.




For example circuits, use 78xx series in fixed positive voltage regualtors.

Suppose you are a beginner. All things in Electronics is too confusing. But you are interested in learning it. I used to be like you. I love learning through the circuit. When I watch a lot of circuits. I started to understand its system.

I try to design(draw) 9 example circuits for you. I hope you clear with these circuits.

78xx Power Supply circuits


We use voltage regulator IC-78XX series Or some call 7800 series. You can change Voltage output get follow want IC number!

5V uses IC-7805 Voltage Regulator circuit,
6V uses IC-7806
8V uses IC-7808
9V uses IC-7809
10V uses IC-7810
12V uses IC-7812
15V uses IC-7815
18V uses IC-7818
24V uses IC-7824

The load is typically regulated to within 10mV and no more than 50mV.

We still use PCB and other equipment as before. To use transformer 1-2A. IC-7800 series to Hold Heatsink.