We found this circuit in the 1964 RCA transistors manual. The transistors used are uncommon today, but they can be used equivalent. The circuit controls the operation of a heating element.
This circuit was found in the magazine of radio amateurs 73 in a 90's edition. The components are...
This circuit was found in a 1974 publication. It converts the applied voltage into pulses of...
This circuit generates approximately 30 Hz signals from a 3.3 kHz clock. The circuit was found at...