Suggested by General Electric in a 1968 documentation this integrated amplifier uses a component of the era, the PA237. The circuit runs on 24 V and excites a 16-ohm speaker.
The scale of this scale uses LEDs, and its accuracy depends on the number of LEDs. We found this...
This circuit found in Hands On Electronics only connects a load, which in this case is an LED. The...
The sensor of this circuit is a common silicon diode and it directly drives a small cooler with a...