This circuit converts infrared pulses into audio and can be used in an experimental telegraphic link. The circuit is from a Popular Electronics from the 90s.
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....