Hi,
i have a problem with tha Honeywell Hall sensor SS443. I use this sensor for mesuring the RPM of the motor. The device has functioned well for 2 days...........then the sensor is died. I've connect the Pin's supply direcly on the + Battery,so i think that the sensor died because the 12 volt of batery,when the car is runnig,is more and more over 12 volt,because the sensor is rated for 24-30 VCC max. Now i've thinked this circuit for protect the sensor:
from the line's battery i put a UF4004 diode(against the reverse voltage),after a 150 OHM 5W resistence and then a Transil 1.5Kw 18 Volt monorirecional ref. to - Battery and here i connect the supply pin of honeywell
UF4004 Transil 1.5Kw 18V Monodirectional
+(Batt)---->|---Resistor of 150 OHM----->//--------|--=B0=B0 OUT | (- Battery)---What do you think? Can protect the hall sensor ? Thanks for Any Help
Ciao, MAX