This circuit is from an ancient American documentation. The transistors are of the time and the circuit uses a special sensor to detect the trigger point to produce spark plugs.
We find this circuit in an American 80's documentation. No further information about the...
This circuit was found in a 1980s documentation. The operational amplifier is of a common type at the...
We found this adapter in a 1970s American documentation on instrumentation. It is suitable for analog...