This presented refrigerator door open alarm circuit which alerts you after a period of time whenever your refrigerator door is left open. This circuit becomes very handy, because in case […]
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Temperature to Voltage Converter Circuit
The post explains a simple temperature to voltage converter circuit using IC LM317. The idea was requested by one of the dedicated members of this blog. Technical Specifications I have […]
How to Make a Barcode Security Lock Circuit
A simple barcode security lock circuit or barcode scanner circuit is explained in the following article using just a handful of ordinary components such as an op amp, an LDR […]
Remote Controlled Night Lamp Circuit
The post explains a simple IR based remote controlled night lamp timer circuit. The idea was requested by Mr. Raj Kumar Mukherji. Technical Specifications Please provide the component values and […]
How to Make a 3 Phase VFD Circuit
The presented 3 phase VFD circuit (designed by me) can be used for controlling the speed of any three phase brushed AC motor or even a brushless AC motor. The […]
Pedal Speed Controller Circuit for Electric Vehicles
In this part of the article we learn about an innovative method of converting pedal press mechanism in electric vehicles into a correspondingly varying electrical signal, which may be further […]