This re-triggerable circuit was found in the April 1988 Radio Electronics magazine. Timings are given by R1 and C1.
Epson SG 8018 Epson Crystal Programmable Oscillators Available from Mouser Electronics, these...
This simple rhythmic light circuit uses a 110 V to 220 V transformer and can hold a good number of...
The CMOS TLC555 [equivalent to the bipolar 555] can be used as a monostable in the configuration...