This simple injector circuit can actually be powered by voltages from 3 to 9 V. The frequency is given by C1 which can be between 4.7 and 10 nF. The CMOS can also be 4011.
In the figure we have a security system consisting of a sophisticated alarm found in a 90s edition...
The purpose of this circuit found in an American 1980s documentation is to produce a current pulse to...
The transistor used in this circuit is uncommon today. AC124 or equivalent such as AC188K and...