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 type of circuit, even with the same configuration, appears several times on this site. The...
This circuit is a wireless temperature transmitter for RF signals in the range of 0.2 to 2 MHz...
We found this circuit in a 1992 Poptronics. What it does is to activate LEDs sequentially,...