We found this circuit in the March 1992 Radio Electronics magazine. The circuit provides 100 Hz for each degree Celsius or Fahrenheit.
The presence of a pulse at the CTRL input produces an audio signal of duration determined by the...
This well-known configuration was found in a 1982 publication. Other operational amplifiers can be...
This control is intended for 110 VAC or 220 VAC Motors. Any TIC series triac can be used according the power...