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.
One of the application circuits we gave with the 4013 in this circuit bank was a bistable switch...
This precision circuit was suggested by General Electric in 1980s documentation. The circuit can be...
This circuit can be used as an answering password system in a store, office, or other location....