This circuit is from a 1974 publication by Motorola. The unijunction may be 2N2646 and bipolar BC558 and BC548. The pulse duration depends on the capacitor.
This is a simple solution for old vehicles that do not have this feature, having been found in a...
Taking advantage of the high input impedance of the operational amplifier 741 and its high gain, we...
An interesting possibility of use for the 555 CMOS is as a low consumption LED flasher, as shown. In...