This percussion circuit was found in an Electronics World of 1968. The transistor may be general purpose and the power supplied at 12 V. The signal must be applied to an amplifier.
This simple robot or motor control circuit using a photocell as a sensor was found in the magazine...
This excellent amplifier has already been presented in other configurations on this website. It is...
This TTL dice is from an old publication from 1978, but it can still be assembled, as the...