This simple timer for incandescent lamps or other non-electronic charges uses a triac as a control element. The triac must be mounted on a heatsink and the time obtained depends on capacitor C2.
This circuit was found in an old Poptronics but is still current as transistors can be replaced...
This circuit generates a multiple Inal with 3 outputs and whose frequency depends on the values of the...
We found this circuit in a documentation on active filters from 1977. The gain of this circuit is...