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.
Found in a documentation for radio amateurs from the 90s, this circuit is suitable for RF...
This circuit found in the February 1992 issue of Radio Electronics magazine is designed to adapt an...
This traditional version of a double time constant dimmer using triac is from the 90s...