We found this circuit in an English publication from the 60's. The transistors are of germanium of the time and the headphones must be high impedance magnetic.
A stereo digital mixer using the 4053 is built as shown in figure bellow. The IC must be powered...
I found this circuit in an English publication from 1989. This configuration can be mounted with...
The purpose of this circuit is to prevent TTL circuits from receiving a voltage greater than 5 V...