This regulator circuit is from Motorola documentation from 1969. It makes use of an integrated regulator of the time. With the indicated transistor, a current of up to 5 A can be obtained.
This contact or reed switch actuation was found in a 1964 Electronic Design. The circuit can be...
This is the previous version, but with a simplification given by the use of the 7404 and 7408...
In the figure we present a circuit of a microphone signal conditioner using the SSM2167 integrated...