The time of this timer depends on C1. The circuit was found in the July 1994 Electronics Now magazine. The supply voltage depends on the relay and can go up to 12 V.
This interesting automotive alarm was found in an English publication from the 1980s. The circuit...
This modem circuit using a 4046 PLL was found in the October 1994 issue of Electronics Now. The...
This traditional timer setting can provide time intervals up to a few tens of minutes. The...