Mosaic
Well-Known Member
Hi all:
I have a requirement to attach 3 ganged temp. sensors as supplied by the TMP432 device to operate over 0°C to 55°C.
**broken link removed**
The challenge is to integrate a method that informs [the uC reading the temperature] when a sensor is not physically attached to the flat surface being sensed.
My initial thought is to include a contact switch on the sensor PCB that opens when the sensor PCB is pressed onto the flat surface being monitored. When any of the 3 switches are closed they 'short' a schottky diode across one of the TMP432 remote, silicon PN temp. junction. This forces a very high temperature reading, triggering a local sensor PCB alarm (LED) and allowing the uC to detect a mounting problem.
Sounds reasonable?
I have a requirement to attach 3 ganged temp. sensors as supplied by the TMP432 device to operate over 0°C to 55°C.
**broken link removed**
The challenge is to integrate a method that informs [the uC reading the temperature] when a sensor is not physically attached to the flat surface being sensed.
My initial thought is to include a contact switch on the sensor PCB that opens when the sensor PCB is pressed onto the flat surface being monitored. When any of the 3 switches are closed they 'short' a schottky diode across one of the TMP432 remote, silicon PN temp. junction. This forces a very high temperature reading, triggering a local sensor PCB alarm (LED) and allowing the uC to detect a mounting problem.
Sounds reasonable?