This circuit was found in a 73 magazine for radio amateurs of the 90s. The circuit uses two types of indicators, the diodes are for general use. The power supply is 5 V.
This high-gain digital amplifier uses general-purpose transistors. The supply voltage is logic...
Obtained from a 1969 neon lamp documentation, this circuit shows how to assemble an indicated...
This 2-quadrant modulator circuit was found in the May 1988 issue of Radio Electronics magazine. The...