This circuit is from Motorola's 1990 Linear Databook. The transistors allow equivalents and the output power depends on the supply voltage. The power supply must be 30 V symmetrical.
This circuit was obtained in 1974. It serves to indicate the tuning of stations on a common...
This circuit is from old documentation but can be applied to modern equivalent components. The...
Bike speedometer (CB20497E) This circuit can be powered by a solar cell. The circuit is from a...