This 600-ohm line driver was found in a 1980s documentation. The integrated circuit used is not common today.
We found this circuit in an 80's EDN. The circuit makes use of a MAX680, being given a table with...
This oscillator produces a modulated signal using a unijunction transistor. We found it in an...
This modulated siren was found in a 1984 documentation and consists of a variation of the previous...