This circuit was found in Siliconix documentation from the 1980s. Equivalent operational amplifiers can be used and the output current is very low.
Any power MOSFET that supports the current of the controlled stepper motor can be used on this...
Found in a 90s Popular Electronics, this simple circuit turns on a light when the light stops to...
The circuit shown in the figure can indicate the presence of static charges by lighting a 6 or 12 V...