This circuit was found in an Electronic Design. It makes use of a relaxation oscillator to trigger an SCR and two relays. The circuit operates at frequencies of 12 to 180 cycles per minute.
This circuit was obtained from an American publication of the 80's. The integrated circuit is of the...
This circuit is from 1992 documentation. In it we have the way to implement a Baxandall control using...
This simple circuit uses a 200 uA microammeter of the type found as VU, being able to measure...