This circuit was found in an old Popular Electronics. The integrated circuit is equivalent to a double 741. The source does not have to be symmetrical.
The time constant for this circuit found in a 1973 publication is given by R and C. The shot is...
This circuit adds the voltage from the secondary of a transformer to an outlet connected to the...
This two-transistor circuit was found in a 1966 US documentation. The power transistors are of the...