Vibration sensor made from a piezoelectric transducer and an LM358 microcircuit Posted by artem83 on October 06, 2025
Directional microphone with reflector and 3-transistor amplifier Posted by artem83 on October 06, 2025
DIY Interturn short circuit tester for anchor or stator of electric motors Posted by artem83 on August 28, 2025