This circuit with the DCP010512 was found in the August 1998 issue of Electronics Now. The integrated circuit is not very common these days.
We found this simple alarm circuit in a 1986 documentation. The circuit uses sensors of the NA...
This sound relay or Vox was found in 70s RCA documentation. SCRs can be common types today and...
Placed near a common receiver, this oscillator is intended to generate a beating signal to receive...