This circuit was found in an Australian publication from 1991. It is a transmitter that transmits a signal when it detects moisture. The range is on the order of a few tens of meters.
One of the most popular EPROM memories of the past is the 2716 2k x 8, whose pinout with practical use...
This circuit inverts the phase of an audio signal, maintaining its intensity. The transistors can...
In the figure we have a simple way to have a peak bargraph indicator. The amplifier is of the...