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.
Here we have an interesting circuit found in a 1981 publication that causes two LEDs to flash...
This circuit was found in Delco documentation from 1965. The transistor is of the time, but any...
This circuit transmits signals to an FM receiver at a distance of up to a few tens of meters. The...