This circuit, to control air conditioning systems, was found in July 1984 Radio Electronics magazine. The circuit is for old types of the time that did not have microcontroller control.
This variable frequency oscillator (VFO or OFV) was obtained in an old Motorola documentation. The integrated...
This electronic ignition circuit was found in Motorola's Linear Databook of 1990. The components are not...
Found in old documentation, this circuit uses components that are still common on the market. The...