This circuit with the ULN3784B appeared in the October 1984 issue of Radio Electronics magazine. It can typically be powered from 9 to 24 V.
Found in a 1974 Ferranti transistor manual, this circuit drives a sensitive 12V relay in...
This circuit is a telephone line simulator and can be used for internal communications. It is...
This half-wave control is used for resistive loads of up to 200W with the TIC106. The diode can be...