Solar timer (CB20498E)

This very low consumption circuit can be powered by a solar cell. The time indication is given by a microammeter.

Inverting amplifier LM741 (CB25917E)
The figure shows how to implement an amplifier with gain 10 using the operational amplifier LM41....
1-Transistor MW Radio (CB11576E)
This experimental AM radio circuit was found in a 1979 English magazine. It can be fitted with a...
Matrix Switching (CB15407E)
This circuit shows how it is possible to control 9 loads with only 6 Triacs using the matrix...