This circuit is from an American documentation from the 90's. The SCR can be of any type and the diodes must have current according to the controlled motor.
This current meter with many scales was found in a 80s American documentation. The operational amplifier...
This circuit was found in the February 1971 issue of Radio Electronics magazine. It is designed to power...
This circuit is old, causing LEDs to be lit sequentially. Several types of games can be programmed using...