It is an improved version of the previous circuit with a voltage follower that reduces the load impedance. The circuit was found in American documentation from the 1980s.
This extremely slow circuit produces one pulse per month and can be used in a timer. We found it...
This circuit was found in a 1964 Electronic Design. The circuit delays the firing of a load for a...
Found in a documentation from the 90's, this circuit already includes an amplification stage. The...