Long-Range IR Transmitter
Most of the IR remotes work reliably within a range of 5 metres. The circuit complexity increases if you design a long range IR...
Telephone Receiver
Ever wondered how the old telephones used to work? find out here. This is a circuit for a telephone receiver without a dialling section. It consists of a ringing section and a condenser mic.
Power Suppy Failure Alarm
The power supply failure alarm circuit presented here needs no additional supply source as it employs an electrolytic capacitor to store adequate charge...
DIY: How to Install Android 7.1 on a Raspberry Pi
Looking for a project on Raspberry pi Android installation? In this video, the presenter will show you how to install Android 7.1 Nougat on...
Mobile Phone Battery Charger
Mobile phone charger available in the market are quite expensive. The circuit presented here comes as a low cost alternative to charge mobile telephones/battery...
Transmission Basics: Beginners Guide To EM Waves (Part 2)
Continued from Part 1. Here we talk about Polarisation.
Theoretically speaking, the waves should be accepted by the antenna and we should have an output....
LED Based Reading Lamp
This LED based reading lamp circuit uses ultra-bright white LEDs to provide sufficient light for reading while consuming approximately 3 watts of power. In the case of AC mains failure, the battery backup circuit instantly lights up the LEDs.
Experimental Study of Switched Capacitor Circuit
In recent years switched capacitor circuit has gained popularity due to their suitability in integrated circuits.
The two major problems faced by IC designers are:
1....
Anti Bag Snatching Alarm
Here is a simple anti bag snatching alarm circuit to thwart snatching of your valuables while travelling. The circuit kept in your bag or...
Dual Audio Signal Tracer
The circuit described here is of a dual audio signal tracer. An audio signal tracer is a simple device used to troubleshoot for audio...