Free Electronic Circuits

- free-electronic-circuits.com

A collection of do it yourself electronic schematics that you can build.

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555 Timer Circuits

- 555-timer-circuits.com

All the electronics info you need to know about the 555 Timer. With over 80 different electronic circuits that you can build.

  649,918   $ 1,200.00

Learning Electronics : Free Electric Circuits Textbooks

- learningelectronics.net

  665,867   $ 960.00