Homemade Circuit Designs Just for You

This site is dedicated to all electronic hobbyists and professionals. Here you can post circuit related queries, have discussions and also publish your own homemade circuit ideas. Get circuits on demand.

Tuesday, October 14, 2014

Super Capacitor Hand Cranked Charger Circuit

The post discusses a simple bridge rectifier circuit which may be applied for charging a bank of super capacitors through any suitable hand cranked generator machine. The idea was requested by Mrs. Janet

Monday, October 13, 2014

Automatic Fish Aquarium Light Optimizer Circuit

The post explains a simple yet effective fish aquarium light optimizer circuit which automatically controls the illumination of a group of appropriately selected LEDs with respect to the varying daylight and after darkness sets in. The idea was requested by Mr. Amit

Saturday, October 11, 2014

Wireless Helmet Brake Light Circuit

The post explains an innovative wireless LED brake light circuit which can be attached to a biker's helmet. The LEDs attached with the helmet circuit illuminates in response to the motorcycle braking  generating an enhanced brake light effect from the user's helmet. The idea was requested by Mr. Bugoy.

Friday, October 10, 2014

Automatic LED Candle Light Circuit

The post describes a simple transformerless LED candle light circuit which switches ON automatically in the absence of ambient light in the room and vice versa. The idea was requested by Mr. Don

Thursday, October 9, 2014

High Current Auto Cut Off Battery Charger Circuit Using a Single Transistor

 The post discusses a single High current transistor based lead acid battery charger circuit with an automatic over charge cut off feature. The idea was suggested by Mr. Raja Gilse.

DIY LED Brightness and Efficiency Tester Circuit

The post details a simple LDR brightness and efficiency tester circuit set up using an LDR and a digital Ohm meter. The idea was requested by Mr. Prashant 

Monday, October 6, 2014

Dissolved Oxygen Sensor Display Circuit

The post discusses a sensor device used for measuring the level or amount of dissolved oxygen in water and other fluids. The idea was requested by Mr. Amit

Sunday, October 5, 2014

Digital Up/Down Volume Control Circuit Using IC DS1668

The post explains a simple digital volume control circuit using the IC DS1668 which can be used in amplifiers and all audio equipment for achieving a push button press up/down volume control facility.

Saturday, October 4, 2014

Power Switch ON Alarm with Auto OFF Circuit

The post discusses a simple monostable based power switch ON larm circuit which automatically switches OFF after an adjustable preset delay. The idea was requested by Mr. Will Boswell.

Solar Panel Optimizer Circuit

A very simple yet effective solar optimizer circuit can be made by employing a LM338 IC and a few opamps.
Readers are advised to proceed with the construction of the presented circuits only after understanding the concepts from the core. Not adhering to this can lead to failures and frustrations.