Found in General Electric documentation from the 1980s, this circuit generates signals that depend on the values of the components given in the table next to the diagram.
This circuit can handle 25 A unde a 32 V voltage using a hight power old transistor. This...
Found in a PE Hobbyst Handbook, this circuit checks if there is voltage in a power outlet by...
This circuit was found in a 90s Hands-On Electronics. When a signal appears at the headphone...