This 4 1/2 digit digital voltmeter circuit was published in the April 1993 Electronics Now magazine. The circuit uses the integrated component of the time and has 5 voltage ranges.
The frequency of this Pierce oscillator, found in 1969 documentation, depends on the crystal. The...
We found this Nicad cell charging circuit in an English publication from the 1970s. The circuit can...
In the figure we have a constant current source for Shape Memory Alloy in wires or Alloy with...