This circuit was obtained from an American documentation of 1967. The circuit provides a 30 mA output current for driving standard Nixie indicator tubes at the time.
This variation of configuration that is common on our site was found in a 1980s documentation. LEDs can...
This very low current circuit was found in the April 1995 Electronics Now magazine. The frequency...
Many reed switches can be wired in series to perform na efficient alarm as shoen in the figure....