This 1968 Hughes circuit uses period components and operates at 8 Hz. Current equivalent components may be employed. Note the high supply voltage.
This integrated circuit is recommended as a standard amplifier in sound equipment, TV sets,...
This circuit is from a 1975 Miniwatts magazine, therefore using Philips components from that time,...
We found this circuit in a 1995 publication. It makes use of infrared LEDs of the type existing at...