K3505 Headlight Alarm with 24V on-board voltage

Kits Automotive projects
1

I would like to use the K3505 Headlight Alarm in a car with 24V on-board voltage.

I was thinking about putting voltage regulators (kind of L7812) in front of the inputs L and C.
Would this work?

Or is it possible to simply replace some of the resistors with other values?

I’m not an expert in electronics, but as far as I see the ICs operate with an input voltage of up to 20V.
So maybe none of the resistors is responsible for voltage regulation?
In turn, does that mean I wouldn’t have to go down to 12V in my first approach? With 15V or 18V it would be easier to keep the voltage regulators cool.

Thanks in advance for your help.

2

This has not been tried or tested, but:

A 12VDC regulator upstream of +V and two resistor dividers for C & L (say 10K) could most likely do the job.

3

Thank you, I’ll give it a try.
First of all I need to purchase the kit, which is not so easy in Germany…