This experimental circuit with Nixie tube was found in the Radio Electronics magazine of March 1969. The circuit serves for demonstrations and also for testing these digital indicator tubes.
May 2017 - Panasonic's new APS1 series of optical couplers with 3 750 V insulation and up to 50...
This circuit can detect both light and shadow using an LDR as a sensor. We found the circuit in an...
This simple megaphone is from old documentation, but uses still current components. The circuit is...