3 ms·
The ADXL78 series [1] which is recommended for vehicle collision sensing draws 1.3 mA. If it were the only load, it would take on the order of ten years to dis
by eck 13y ago
The ADXL78 series [1] which is recommended for vehicle collision sensing draws 1.3 mA. If it were the only load, it would take on the order of ten years to discharge a car battery, which is well below the self-discharge limitations. I don't know if lower power sensors are available, or if some rule like "enabled for 24 hours after the car is run" would be appropriate, but lack of power for the sensor does not seem like a good reason for the airbags to be disabled.
Bluetooth devices actively searching for devices to pair with could plausibly draw significantly more power than that.
[1] http://www.analog.com/static/imported-files/data_sheets/ADXL78.pdf http://www.analog.com/static/imported-files/data_sheets/ADXL...
- toomuchtodo 13y ago> if some rule like "enabled for 24 hours after the car is run" would be appropriate There are pressure sensors, such as those used to determine if the passenger airbag should be enabled/disabled. That should be the reference for both driver and passenger; if seat = occupied, trigger airbag if collision detected, regardless of engine status, ignition switch position, etc If only automakers could update this sort of logic over the air...