We found this circuit for musical instruments in the March 1992 Radio Electronics magazine. The circuit has outputs according to the desired scale from a crystal oscillator at the indicated frequency.
This inverter can source voltages up to 400 V from a 3 to 6 V supply, but output current is very...
This shoot-to-target game uses well-known CMOS circuits and the player hits the LED by squeezing...
This indicator for audio signals uses only 3 components. LEDs are common and the audio signal with...