This small signal amplifier circuit was found in Motorola's 1969 documentation. The FET and the transistor can be of any type and is battery powered since the consumption is very low.
We found this circuit in a 1978 documentation. The SCR conducts when the regulator's output...
The outputs of this timer or CMOS timer configuration with the 4011 integrated can be connected to load...
This circuit is from 1995 documentation. When the phone is lifted, the relay closes its contacts by...