This windshield wiper timer was obtained in an 80's Hands On. The transistor can be the BC548 and the relay is 12 V sensitive. The time is set to R3.
This circuit transmits the audio signals from a telephone line to an FM receiver placed nearby. The...
This interesting circuit suggested by Motorola increases the duration of a pulse produced from the...
This circuit with SCR and Unijunction and which can be assembled today with modern equivalents was found in a...