This circuit was found in documentation from the 1980s. It is powered by the audio signal that must be cut. Transformers are the critical components and transistors are 2N2222.
This electrochemical circuit monitors the conductivity of the oil indicating when to change it. The...
May 2016 - Mouser Electronics has in stock the new Grayhill 5-inch touch displays type 3D50. The...
This circuit was found in an 80's Electronic Design. It amplifies TTL fast signals for a coaxial...