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Various simple electronics projects for beginners

Various simple electronics projects circuits diagrams for hobbyist and beginners . Simple circuits, mini projects with diagrams and description from many electronics categories.

Infrared audio receiver circuit

This infrared audio receiver circuit is designed using SL 486 IC and some other common electronic parts.
Using this infrared audio receiver can make a wireless connection between two devices.

Circuit Diagram: 
Infrared audio receiver circuit diagram

Infrared audio transmitter electronic project

Using this electronic circuit can be made a infrared audio transmitter which can transmit audio signals over a certain distance without using cables.

Circuit Diagram: 
Infrared audio transmitter electronic project

Warning lights for bicycles

A simple warning for bicycles can be designed using electronic diagram below. This warning works when the bike is in motion, and while is at rest (at traffic lights) because the light still works, is powered by accumulator.
During walking with lighting "connected" (bicycle dynamo is connected), NiCd battery consists of four mounted in series, is charged through R1 and D1, the relay is closed, and its contacts connects bicycle lamps to the battery.

Circuit Diagram: 
Warning lights for bicycles electronic circuit project schematic


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