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 the February 1983 issue of Radio Electronics magazine. The 4-digit...
We found this circuit in an old American documentation. It is an electronic rheostat with a...
With this circuit it is possible to trace the characteristic curve of a component using an...