This analog volt-ammeter was found in an Electronics World of 1968. It makes use of a 0-1 mA analog milliammeter. Accuracy depends on the components.
The crystal frequency of this circuit found in an American documentation is limited only by the...
This is the receiver from the previous alarm system. The circuit is from Radio Electronics, April...
The circuit shown bellow is gated by an external signal. A high logic level applied to the input...