Suggested by General Electric in a 1970 documentation, this circuit makes use of some components of the time, in the case of transistors. The circuit detects smoke by the transparency changing of the air.
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....