Suggested by Sprague in the 1980s documentation, this circuit can control three-phase AC motors. The original documentation does not specify the maximum motor current.
This circuit was found in a 1964 Electronic Design. The circuit makes use of transistors of the...
) This circuit was found in a 80’s Popular Electronics. It issues a warning signal with the signal...
This simple circuit uses a 200 uA microammeter of the type found as VU, being able to measure...