Power Supplies (174)

Browse through a total of 174 power supply circuits. Great collection of power supply and PSU projects: battery chargers, regulators, solar power supplies.

DC to DC converters   battery chargers   battery indicators   battery monitors   variable power supplies   voltage and power inverters   voltage converters   voltage regulators  

Inverter Schematic

Portable Power Inverter Circuit

T.K. Hareendran - 11/29/16

Recently, my neighbor expressed a deep interest in building a low-power inverter from scratch. This portable power inverter [...]
lipo charger circuit

Compact 2S LiPo Battery Charger

T.K. Hareendran - 09/28/16

The compact LiPo battery charger introduced here can be used to charge almost all standard 2S LiPo battery [...]
microcontroller power supply circuit

Smart Power Supply for Microcontroller Projects

T.K. Hareendran - 04/06/16

A good, reliable and easy to use dc power supply is probably the most important thing for every [...]
power surge protection circuit

Power-Back Surge Protection Circuit

T.K. Hareendran - 10/11/15

Power-Back Surge Protector is a simple yet effective solution for protecting your valuable and sensitive electric/electronic systems. Power-Back [...]
5V Power Bank with 3.7V Li-Ion Battery circuit

uC Li-Ion Power Bank w/ MC34063

T.K. Hareendran - 08/24/15

Lithium-Ion (Li-Ion) batteries have become popular for portable electronics and microcontroller projects because they boast the highest energy [...]
power supply voltage monitor circuit

uC 5V Power Supply Voltage Monitoring

T.K. Hareendran - 04/27/15

This circuit is a very simple voltage monitoring device for +5V VCC supply lines. It can be used [...]
microcontroller power supply circuit

Precision MicroController Power Supply Unit

T.K. Hareendran - 02/14/15

Lots of projects use the microcontroller (uC) as the ‘brain’ - for example as an intelligent controller in [...]
mcp1640 single cell to 3.3v boost converter

1.2V/1.5V Single Cell to 3.3V Boost Converter

P. Marian - 01/23/15

Sometimes I need a 3.3V power source but the only one that I have are the 1.2 volt [...]
1.5v to 3v boost converter

One Battery to 3 Volts Step-up (Boost) Converter

P. Marian - 01/21/15

With the help of this simple circuit you will be able to convert any voltage between 0.9V and [...]
36V Battery Level Indicator circuit

36V Battery Level Indicator

Jim Keith - 01/12/15

This battery level indicator offers (5) LEDs that light up progressively as the battery voltage increases. This is [...]
SMPS hack

Hack the PC SMPS!

T.K. Hareendran - 01/12/15

Modern personal computers (PC) use well designed, rich capacity and reliable switch mode power supplies (SMPS), which ought [...]
SCR 12V to 5V USB Converter Schematic 3

SCR 12V to 5V USB Converter

Jim Keith - 12/23/14

SCRs are the switching devices for this unusual DC to DC converter that is suited for the ubiquitous [...]
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