We found this circuit in the March 1980 Radio Electronics magazine. The circuit used is the HA2400 released at the time. The power supply must be symmetrical.
This circuit can be used as a time automation for driving motors in robotics and mechatronics. What we have...
The source used in this timer is of the type without transformer and regulated by the 7 W zener. The...
This trigger-delay circuit was found in a 1960s General Electric unijunction transistor manual. The...