The post explains a simple relay changeover circuit which may be used for switching a couple of A/Cs or any similar load alternately in order to avoid misuse and save […]
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LM317 IC Tester Circuit – Sort Out Good ICs from Faulty Ones
Here is simple but handy testing circuit for LM317 adjustable voltage regulator IC. I am sure it can be used to test other similar ICs like LM117, LM158, LM358 etc. […]
2 Useful Energy Saver Solder Iron Station Circuits
In this post we learn how to build a energy efficient soldering iron station circuit for achieving maximum power saving from the unit, by ensuring that it is automatically switched […]
Flashing LED Battery Low Indicator Circuit
The post explains a simple low/normal battery voltage status indicator circuit through a flashing and a constant LED, where the flashing LED indicates a normal status while the solid indicator […]
Bipolar Transistor Pin Identifier Circuit
In the proposed BJT pin identifier circuit when the circuit is switched on, two jumpers will have both LEDs ON and the third will have only one LED illuminated. Investigated, […]
Lamp Outage Detector Circuit for Car Turn Signal
The O.E.M. turn signal flashing units installed in automobiles have two basic functions i.e. Flasher and Lamp outage detection. These flashers are usually built with an 8-pin IC like U2044B, […]