This circuit was found in the December 1992 issue of Radio Electronics magazine. The current is a few mA and the maximum input voltage is around 12 V.
August 2017 - This Maxim component, available from Mouser Electronics, is ideal for wearables,...
In the figure we have a solar power source for experiments with this type of energy. The cells must...
This Morse code practice circuit produces a tone at the speaker whose frequency depends on C1 and...