Found in the September 1998 issue of Electronics Now, this circuit uses an encoder with reed switches. The circuit indicates the position of a “indicator” and thus the direction of the wind.
B In this circuit we show how to use an electret microphone powered by a small battery (can be of...
This circuit is from a 1976l filter cookbook. The circuit has a factor Q = 3, and must be supplied...
Using transistors at the time, this circuit was found in a 1970s documentation. Transistors support...