This circuit was found in a 90s Radio Electronics. The integrated circuit admits an equivalent. The power supply will depend on the integrated circuit used.
Using a ceramic resonator, it is possible to vary the frequency between 4.9 MHz and 5 MHz. The...
The circuit in the figure can be used to trigger a triac or even a comparator in a project that...
This is a circuit with two switches, one turns on and the other turns off for DC loads using SCR....