This circuit is from a documentation from the 70s. The circuit uses logic gates of the time, which in many cases were arrays of transistors allowing use as audio amplifiers, as in this case.
Servo motors operate from the changes in the pulse width in a range between 1 and 2 ms. The...
This circuit was found in a publication of1994, originally obtained from the National...
This capacimeter was obtained in European documentation from the 1980s. The indicator instrument, a...