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.
This circuit was obtained in the 1990 Motorola Linear Databook. The circuit uses a 139 series...
This basic amplifier using complementary transistor in the output sources about 0.5 W of good...
Texas Instruments Type D flipflops N74LVC1G79 and SN74LVC1G179-Q1 for operation from 1.65 to 5.5V...