Power control

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Power Zener Circuit
Power Zener Circuit
August 31, 2010

In this circuit a zener diode is "amplified" by a set of power transistors. The transistors substantially increase the current and power to the load. [more]

Power Fail Alert
Power Fail Alert
August 31, 2010

In this circuit an electricity supply (domestic or industrial) is continually monitored. Should the supply be interrupted then an alarm will sound for the duration of the interruption. It has battery backup and overcharge protection. [more]

Multiple Output DC Converter
Multiple Output DC Converter
August 31, 2010

A DC converter circuit taking one single DC input and converting to parallel multiple DC outputs. [more]

1.3 Volt Power Source
1.3 Volt Power Source
August 31, 2010

This is a replacement power source for 1.3V mercury cells or other small batteries. It has many uses and I use this circuit in my computer to power a front panel multi adapter which has a digital thermometer. [more]

Add-On Current Limiter for Power Supplies
Add-On Current Limiter for Power Supplies
August 31, 2010

This circuit allows you to set a limit on the maximum output current available from your PSU [more]

Overvoltage Protection for the LM317
Overvoltage Protection for the LM317
August 29, 2010

This is an add-on Over Voltage Circuit for the LM317 Regulator Circuit submitted by Matthew Hewson [more]

LM317 Voltage Regulator
LM317 Voltage Regulator
August 29, 2010

It has many uses and the voltage can easily be adjusted by the use of a potentiometer. The voltage regulator is an LM317T, and should accept up to about 14 volts without problems. It can handle up to 1 amp, but you WILL need a... [more]

Variable Voltage Regulator
Variable Voltage Regulator
August 29, 2010

Simple Variable Voltage Regulator circuit diagram [more]

Universal DC-DC Convertor
Universal DC-DC Convertor
August 29, 2010

This circuit will generate a smaller DC output voltage from a larger DC input voltage [more]

Increasing Regulator Current
Increasing Regulator Current
August 29, 2010

An outboard pass transistor used to increase the current output of a voltage regulator IC. [more]

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