The purpose of this circuit is to convert a short-lived pulse into a negative rectangular pulse. The circuit uses a unijunction that can be replaced by an equivalent such as 2N2646.
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...