We found this circuit in a 1968 General Electric publication. The circuit uses an SCR of the time, but any modern equivalent can be used. The relay must have contacts that support the horn current.
This interesting circuit suggested by Motorola increases the duration of a pulse produced from the...
This symmetrical power source for currents up to 1 A was found in a 1986 documentation, serving...
We found this circuit in the Linear Applications Handbook of the National Semiconductor of 1994....