Adjustable Auto transformer


Posted on Apr 4, 2012

An isolation transformer and a variable auto transformer, very much like a Variac. Fuse 1 protects against gross overload. Lamp 1, across the Fuse 1, is a red incandescent pilot lamp and it lights up in the event of a blown fuse. Imagine how much time this would save when bringing up a stubborn power supply. Take note: Everything that can possibly come in contact with the user is connected to earth ground. in practice, I also have a earth leakage breaker dongle in series with this device.


Adjustable Auto transformer
Click here to download the full size of the above Circuit.

The circuit was carefully assembled using crimp connectors for all of the screw-down connections, with proper insulation via heat shrink tubing. All of the pieces of the steel and aluminum box were connected by bonding wire. All of the conductors were taken from 0.5 square mm lamp cord to assure the required dialectic strength. The earth leakage dongle (GFIC dongle) also passes the earth ground through to the output connector.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Add current boost to a USB charger
Timed Beeper
Speed regulator for dc motors
Overvoltage protection circuit
High speed warning device
Uhf Tv-Line Amplifier
Audio Mixer based JFET 2N3819
Logic Probe Project
ultrasonic receiver circuit
transistors LC circuit
remote-control-circuits
LM2002 Series 8W audio power amplifier circuit
Conveyor control Ladder



Top