This circuit is from an old Mullard (Philips) manual with applications using the 555. Choosing appropriately the resistors and the timing capacitors, the ranges obtained can exceed days.
The R-S flip-flop shown here uses two NOR gates and is set and reset by positive pulses applied to...
This circuit is intended for SSB transmission by generating two sideband signals with the carrier...
In the figure we have the way to make the three-phase control of a motor using opto-diacs. The circuit is...