This two-digit timer was found in the 1983 Special Projects issue of Radio Electronics magazine. The circuit uses components that can still be found today.
This useful power supply can provide voltages from 0 to 12 V with currents up to 2 A, set in...
This circuit of old documentation can be implemented with modern operational amplifiers. The...
The base of this circuit is 1/4 of an integrated circuit 4136 which consists of a quadruple 741....