This circuit was found in documentation from the 90s. The operational amplifier is NE5514, which is uncommon today. The configuration can be adapted to use modern components.
This is the normal configuration for the TDA2003 integrated circuit, an amplifier that can provide 10...
This circuit uses a thermistor or NTC as a temperature sensor and provides the indication on an...
Operating in the FM range, this is one of the many versions of FM transmitter that the reader can...