Microcontroller configuration problem

[yyyyaser]

thanks in advance,

i need help for this circuit shown
- the wireless receiver only produces pulses (12v for on , -12v for off), so a regular relay cant be used because once the pulse is gone , it wont conduct , and i cant find an impulse relay.
- i want to use a microcontroller, but is there a micro that can take -12v as a logic zero and +12v as a logic one.
-if i cant get one of these, how can i configure the circuit to be used with a regular microcontroller.
-can i use a voltage regulator this way:i/p:12v , o/p:5v.

 

[john blue]

you can use voltage shifter, like those Max232 for Serial to TTL

 

[IanP]

One resitor and a zener diode would be the simplest input signal converter, as shown here:
**broken link removed**
:wink:

 

[yyyyaser]

thanks any way