The transistor on this mixer can be any general-purpose transistor. The number of entries can be changed. We found it in an old documentation. Input and output cables must be shielded.
Texas Instruments has downloadable documentation on designing digital isolators. The Digital...
This old AM receiver with an integrated circuit came out in a documentation from the 80s. The...
This simple circuit serves to demonstrate the working principle of a Set-Reset flip-flop (S-R or...