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 1993 Electronics Hobbyst Handbook. The circuit operates in the FM...
This circuit with passive components uses an LDR as a sensor. The potentiometer adjusts the...
This two-transistor circuit is from a December 1964 Radio Electronics. Modern transistors can be...