This 3 and-a-half digit circuit was found in a Teledyne documentation from the 90s. The circuit uses a thermocouple as a sensor. The integrated circuit used is uncommon today.
We found this car theft alarm circuit in a 1988 publication, but the components used can still be...
This is stage is transformer coupled and was found in na old publication of the year 1958. The...
Found in documentation from the 1980s, this amplifier uses an integrated circuit from the time....