I'm trying to build an indexing system for a model railway turntable. I want to use a hall effect sensor as a tachometer for a gear, and control the motor with an Arduino and an H bridge. I have a cheap H bridge motor driver board from Ebay and an Arduino Uno and a latching hall effect sensor from Sparkfun. With the turntable motor I have to use, I am getting tons of electrical noise. It is triggering the interrupts on the Arduino any time it's on. What can I do to reduce this?
Here is the schematic for the hall effect sensor portion of the circuit. Sensor Datasheet
I'm using a motor driver board, not the official Arduino motor shield, to drive the motor. It doesn't have a data sheet to my knowledge but here is an Amazon link.
The motor I am using is an Atlas HO turntable motor, and according to the part number on the side, I found this data sheet. [It won't let me post a link because of my reputation being less than 10. The motor is an FK-280PA.]