This small phonographic amplifier was found in a 1967 General Electric documentation. The integrated circuit is from that time, providing 1.5 W of output power.
This circuit was found in a 90’s EDN. The components used are still common and the sensors can have...
The frequency of TTL square signal is divide by 5 with this circuit. Power supply is 5 V and the...
This circuit generates signals from 0.01 Hz to 10 kHz, but uses unusual components today. The...