This timer was found in Japanese documentation from the 1960s. The transistor can be replaced by an equivalent and the relay must be of the sensitive type with voltage according to the power supply.
This circuit of a Popular Electronics is intended to control a wiper. The circuit consists of a...
Using germanium transistors, this amplifier provides a 540mW output power when powered by 9V. We...
We found this high input impedance, low output impedance amplification stage in the October 1993...