The time of this timer depends on C1. The circuit was found in the July 1994 Electronics Now magazine. The supply voltage depends on the relay and can go up to 12 V.
The sensitivity of this circuit depends on the 22 M resistor. The circuit is from old Texas...
Datasheet of This amplifier uses a pair of complementary transistors at the output and can provide 1 W of...
This circuit was obtained in a French documentation from 1981 and can be easily assembled. The...