This circuit is suitable for the calibration of old analog oscilloscopes. It was found in documentation from the 1970s and could be useful if someone is recovering an oscilloscope of the time.
) This interesting circuit of 18 multiplexed LEDs was found in the February 1992 issue of Radio...
This 1969 Philips documentation circuit makes it possible to control an engine through the sound...
This circuit can operate with 5 uV to 1 mV input signals from low impedance sources such as...