This optical coupler for short distances is powered by 12 V which is the voltage of the lamp and the relay. The circuit can also use emitting LEDs and the phototransistor can be of any type.
The integrated circuit of this 1976 configuration is the 7400 and the type crystal in televisions of the...
This circuit, from a technical documentation from the 1970s, converts a low frequency sinusoidal signal...
March 2017 - The new 2W DC-DC converters from Recom can now be porchased at Mouser Electronics. The new...