Found in a 1967 General Electric SCR manual, this circuit can be used to protect a load by switching in case of excess current. R1 determines the trigger current.
This circuit was obtained in a 1978 English magazine. This circuit is one of many that the reader...
In the figure we have the way to use a common LED as a light sensor. The operational power supply...
If you have a common analog multimeter, you can increase its input resistance in the measurement of...