We found this circuit in the March 1992 Radio Electronics magazine. The circuit provides 100 Hz for each degree Celsius or Fahrenheit.
This circuit was found in a Popular Electronics from the 90s. The circuit with the 555 monitors the...
We found this circuit in a 1967 American documentation. It is a transmitter for animal research,...
We found this circuit in a 1995 publication. It makes use of infrared LEDs of the type existing at...