If you find this information useful and want to thank me, why not buy one of my low-cost "virtual books" that you can download direct to your computer? My books can be read on-screen or printed out on paper. They are full of colour photos and illustrations. Click on "Books", above, for more information.

Example LED flasher Circuit

Running an LED off just 3 volts to make a Flasher unit

This circuit uses the TLC555CP timer I.C. to flash an LED roughly twice every second. This particular type of 555 timer will run off only 3 volts so two 1.5 volt cells can be used. With "AA" cells, you can expect a battery life of up to 6 months. With larger "C" or "D" type cells it will last for years. The circuit can be incorporated into a roadside lane marker bollard or used as a warning for other obstacles such as fences, scaffolding tubes or parked vehicles. It can also be suspended from light switch pull-cords to make them easy to find in the dark.

Fully described, with Veroboard and Protoboard layouts, in my book "Beginners Guide to Electronics".

Available as a kit from SatCure.

Back to Design Index Page

Next Design Page