The power transistor of this circuit can also be the TIP42 mounted on a good heat sink. The circuit is from old European documentation and the integrated circuit used is not very common today.
This circuit allows you to read resistors up to 20 M ohms, converting it into voltage. The circuit is...
The circuit in the figure is a useful continuity test serving to check the condition of circuits and...
This circuit beeps when the sensor is triggered by the opening of the freezer door or other...