This circuit for the VHF band of analog TV was found in Motorola documentation from the 70s. The integrated circuit used is uncommon today.
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...