you are here: home

Random circuits

Cheap Audio Booster

Cheap Audio Booster ... [read]

Speech Recorder

The 2 pushbuttons = S1: Start/Pause. S2: Stop/Reset. If you want to play your message, put S3 at Play. Then push S1 to start playing and again to pause. If... [read]

Welcome to free circuit diagrams archive!

Bookmark and Share
if you liked this page, please consider sharing it. Thank you!

Circuit diagram symbolsWelcome to our Website! We are here to show You how to make various interesting electronic devices on your own. Some of the devices are: Amplifiers, Power sources, Metal detectors, Alarms, Insect repellant, light, sound or touch sensitive devices, Whistle responder which produces sound when called by a whistle and our visitor's favorite Light and LED devices… We can’t name them all right here, so we suggest You browse through our collection of diagrams on your own.

We have over 400 free electrical diagrams, divided into 10 categories. You can check out the list of categories here, or in the main menu on the right. By entering one of the categories, You will see a list of circuit diagrams with a brief description.

You won’t need too much of an experience, for making most of devices offered here, but it’s necessary to know how to work with a soldering iron, know the circuit symbols and also correct reading of the electrical diagrams.

We have to mention that some of the diagrams use voltages that can be hazardous to health and your life, so we urge You to read the disclaimer before making any of the devices from our website.

We hope You will have fun, and also learn something while making devices using information from this website. Thanks for visiting!

Top circuits

Low cost-Automatic Emergency Light

1. It is highly bright due to the use of white LEDs. 2. The light turns on automatically when mains supply fails, and turns off when mains power resumes. 3.... [read]

230V Blinking LED

I needed a pulsating light for a certain signaling. Voltage was 230V. So I decided to make a simple circuit, consisted of a LED diode, two capacitors, two... [read]