We found this circuit in the March 1992 Radio Electronics magazine. The circuit provides 100 Hz for each degree Celsius or Fahrenheit.
The scratch is the noise of scratching or scrape that occurs when scratched vinyl records are...
The purpose of this circuit is to eliminate RF picked up by a turntable. The circuit is from a...
The circuit shown uses an operational transconductance amplifier such as the LM3900. Transistors...