This circuit was found in the September 1997 issue of Electronics Now magazine. The circuit uses two op-amps and includes the symmetrical power supply.
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...