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Power supply

Simple Solar-Powered 12V Water Pump Circuit with Battery

Last Updated on: September 18, 2025 by Apichet Garaipoom
simple solar-powered 12v water pump

A solar-powered water pump circuit for a place with no power outlet, with a battery. We’ll learn how to use a MOSFET instead of a relay, as well as the NE555 timer circuit. Read more

Categories Power supply 7 Comments

Adjustable 7805 and 7905 Voltage Regulator Circuit

Last Updated on: January 18, 2026 by Apichet Garaipoom

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

Categories Power supply 17 Comments

0-12V 3A Variable Power Supply Circuits

Last Updated on: August 2, 2025 by Apichet Garaipoom
0V to 12V 3A Adjustable power supply using LM350

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

Categories Power supply 10 Comments

5V 3A Power Supply circuits using LM350 | transistors

Last Updated on: July 16, 2025 by Apichet Garaipoom
5V 3A power supply circuit using LM350 & transistor for micro controller

See 5V 3A power supply circuit using LM323K or LM350 or 7805 by helping of the power transistor. For digital load, microcontroller, even raspberry-pi. Read more

Categories Power supply 5 Comments

6V to 12V boost converter circuits

Last Updated on: July 13, 2025 by Apichet Garaipoom
Experiment simple 6V to 12V boost DC converter circuit using transistors

Simple Step up DC converter circuit using Transistor 6V to 12V! Read more

Categories Power supply 5 Comments
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