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 hás a Power output of more than 1 W. It is used in small experimental or low power...
This circuit was found in a former Popular Electronics. The timing is given by R1 and C1, R4 and...
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...