This circuit for cars of the time was found in a Popular Electronics magazine from the 90s. The circuit is based on CMOS logic that is common even today.
Of course, with a change in the cable length, the frequency can be changed as long as it is within...
This circuit is basically the same configuration as the previous one with a power stage with...
Using the ZN1034E which reaches 19 days interval, this is a simpler circuit which can be...