This circuit was found in General Electric documentation from 1965. The transistors are from that time. The diodes consist of a component that contained them.
This is a common crystal oscillator configuration with 80s transistors. The circuit has the...
This CMOS integrated alarm was found in the July 1992 Radio Electronics magazine. The circuit has...
This circuit was found in an Electronics World of 1966. It has a range of 5 to 25 000 Hz at 1 dB...