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Dual Regulated Power Supply – Circuit Schematic
Dual Regulated Power Supply
In this circuit, the 7815 regulatates the positive supply, and the 7915 regulates the negative supply. The transformer should have a primary rating of 240/220 v...
Basic UPS Power Supply – Circuit Schematic
Basic UPS Power Supply
This circuit can be adapted for other regulated and unregulated voltages by using different regulators and batteries. For a 15 Volt regulated supply use two 12 ...
0-30 VDC Stabilized power supply with current control 0.002-3 A – Circuit Schematic
0-30 VDC Stabilized power supply with current control 0.002-3 A
This is a high quality power supply with a continuously variable stabilised output adjustable at any value between 0 and 30VDC. The circuit also incorporates an...
Simple regulated power supply with overcurrent trip – Circuit Schematic
Simple regulated power supply with overcurrent trip
The 15v zener is fed via the 4K7 resistor from the input. With 0.6v across the base - emitter of the PNP transistor, this establishes a voltage of 14.4 across t...
Simple 5V power supply for digital circuits – Circuit Schematic
Simple 5V power supply for digital circuits
This circuit is a small +5V power supply, which is useful when experimenting with digital electronics. Small inexpensive wall tranformers with variable output v...
Dual Polarity Power Supply – Circuit Schematic
Dual Polarity Power Supply
This dual polarity power supply is easy to build, requires few parts, and is adjustable from 0-15 volts. It is great for powering op amp circuits, as well as ot...
Fixed Voltage Power Supply – Circuit Schematic
Fixed Voltage Power Supply
The fixed voltage power supply is useful in applications where an adjustable output is not required. This supply is simple, but very flexable as the voltage it ...
High Current Power Supply – Circuit Schematic
High Current Power Supply
Since my page was first posted, I have received a number of emails asking about a high current power supply. I looked around, but couldn`t find one that was sui...
Power Supply – Circuit Schematic
Power Supply
When working with electronics, you always need one basic thing; power. This power supply is great for powering all kinds of electronic projects. It produces a w...
Transformerless Power Supply – Circuit Schematic
Transformerless Power Supply
I have received a few emails asking for a transformerless power supply. Here is such a supply. This supply uses no heavy step down transformer and has an extrem...
Unregulated Power Supply – Circuit Schematic
Unregulated Power Supply
A basic full wave rectified power supply is shown below. The transformer is chosen according to the desired load. For example, if the load requires 12V at 1amp ...
600 VOLTS POWER SUPPLY FOR QRO – Circuit Schematic
600 VOLTS POWER SUPPLY FOR QRO
Amateur Radio Transmitters using valves such as 807 or1625 works well with a plate voltage between 600V to 700 Volts.The circuit described here is a full wave v...