In many critical circuit applications, like power amplifiers, inverters, etc it becomes necessary to use matched transistor pairs having identical hFE gain. Not doing this possibly creates unpredictable output results, […]
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Simple Line Follower Robot Circuit using LM324
The article explains a simple line follower robot circuit, also known as line tracker vehicle, using just a couple of op amps from the IC LM324 and a few other […]
Precise Battery Capacity Tester Circuit – Backup Time Tester
The precise battery capacity tester circuit explained in the following article can be used for testing the maximum backup capacity of any rechargeable battery in real time. By Timothy John […]
Sound Triggered Halloween Eyes Project – “Don’t Wake the Devil”
This can be a perfect circuit project for Halloween, although sound activated gadgets likewise may have plenty of other applications. When somebody enters the Halloween house, a sensitive MIC detects […]
Automatic Door Circuit using PIR – Touchless Door
Along with social distancing and masks, the other major thing the post COVID-19 era has compelled the world to implement is to go touchless. This is being recommended for the […]
Simple Frequency Meter Circuits – Analogue Designs
The following simple analogue frequency meter circuits can be used for measuring frequencies which may be either sine wave or square wave. The input frequency which is to be measured […]