This circuit is designed to control static loads fed by direct voltage. The circuit is from Motorola documentation from 1968. Equivalent SCRs may be used depending on the load.
Found in a 1965’s Electronic Design, this circuit operates with a voltage of 1.5 V. The relay can...
We found this shield circuit in a 1991 technical documentation. The phototransistor can be...
This circuit found in a 90s Popular Electronics, triggers a huge array of LEDs from the sounds...