We found this circuit in December 1986, Radio Electronics magazine. It uses 3 inverters and has the frequency determined by the crystal. The power supply is 5 V.
We found this circuit in a 1986 documentation. It is based on TTL integrated circuits that can be...
This circuit was obtained from a 1968 Philips publication. The transistors are of the time. Dual...
This project, found in a 1981 documentation, consists of an interesting adaptation of the test...