This biestable vox circuit was found in an old documentation. The circuit makes use of components of the time (80's) and can work as a shield since the power is 5 V.
This circuit protects an operational amplifier with respect to both current and voltage. The...
Found in a 1967 RCA documentation, this circuit can be made with equivalent SCRs according to the...
We found this circuit in a 1972 documentation. The transistor, in fact, is a unijunction that can...