I'm testing a MEMS accelerometer with a piezoelectric one, the sensor is mounted on a pcb and requires a voltage supply to work. The data sheet for the sensor gives a supply voltage range of 3.3V to 5V. To get this I've decided to use an old phone charger, it produces 3.7V and as far as I'm aware will work. The problem comes from the fact that the spec sheet quotes a max current supply of 5mA and the charger gives out 355mA. My solution is to simply place a 800 ohm(or roughly equivalent value) resistor in series between the live wire of the charger and the point on the the board wher i connect the supply volatage and connect the ground wire of the charger to the appropriate connection on the board.
I would appreciate advice on wether or not this will work and if it isn't likely to work, alternative soultions would be very helpful.
Thanks in advance.
I would appreciate advice on wether or not this will work and if it isn't likely to work, alternative soultions would be very helpful.
Thanks in advance.