N20 encoder

Specifications of Encoders
This kit includes two dual-channel Hall Effect sensor boards and two 6-pole magnetic discs that can be used to add quadrature
encoding to two micro metal gearmotors with extended back shafts(motors are not included with this kit). The encoder board
senses the rotation of the magnetic disc and provides a resolution of 12 counts per revolution of the motor shaft when counting both
edges of both channels. To compute the counts per revolution of the gearbox output shaft, multiply the gear ratio by 12.
This compact encoder solution fits within the 12 mm × 10 mm cross section of the motors on three of the four sides, and it only
extends 0.6 mm past the edge of the fourth side (note: if you need it to be flush with that last side, you can carefully grind the board
down a little and solder to the remaining half-holes). The assembly does not extend past the end of the extended motor shaft, which
protrudes 5 mm beyond the plastic end cap on the back of the motor.
Pinout and installation
The encoder board is designed to be soldered directly to the back of the motor, with the back shaft of the motor protruding through
the hole in the middle of the circuit board. One way to achieve good alignment between the board and the motor is to tack down the
board to one motor pin and to solder the other pin only when the board is flat and well aligned. Be careful to avoid prolonged
heating of the motor pins, which could deform the plastic end cap of the motor or the motor brushes. Once the board is soldered