This Diode tester circuit can check the diode the good or bad and also can indicate its polarity. using op-amp 741IC and LED for display. [...]
It is easy if you control DC motor in a single direction. Sometimes you think. How to rotate DC motor in both direction. You are not worried. There are many…
If a friend gets into trouble about the noise. Try out this circuit before
This Split stereo signal circuit model to are simple at use in fining wideness of a signal stereo. Which be valuable very for an earphone stereo. or the system that the opening between a loudspeaker too much.