This traditional TTL configuration was obtained in a 1977 documentation. The supply must be made with 5 V and the capacitors can be changed for operation at other frequencies.
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...