Mouse Wheel Quadrature Encoder blog series

2 Aug 2016

I recovered the rotary encoder of a mouse, and experimented with it.

Here's an overview of the articles that show how to control the wheel from an FPGA, and Arduino and a few other boards.

Also check out the research that scanlime is doing on a 74xx-chip mouse.

The Blog series:

Content
Part 1: Electronics
Part 2: Capturing Input on Cypress PSoC4
Part 3: Capturing Input on an Arduino
Part 4: Capturing Input on a Texas Instruments Hercules LaunchPad with eQEP
Part 5: Capturing Input on an FPGA
Real World Application: Hercules LaunchPad and GaN FETs: Control Big Power with a Flimsy Mouse Scroll Wheel

{gallery} Quadrature Encoder Picture Gallery
Quadrature Encoder Debounce and Pull-up schematic
Capture Encoder Output A and B
Quadrature Decoder Signals explained in TI RM46x Manual
Encoder signal capture
Encoder signal capture
With a Cypress SoC
With an Arduino
With a Hercules LaunchPad
Decoder State Machine as documented in TI RM46 TRM
RM46 decoder config in HALCoGen
On a Papilio with Xilinx Spartan 6
FPGA PWM output Signal capture

{gallery} Quadrature Encoder Picture Gallery

Quadrature Encoder Debounce and Pull-up schematic

Capture Encoder Output A and B

Quadrature Decoder Signals explained in TI RM46x Manual

Encoder signal capture

With a Cypress SoC

With an Arduino

With a Hercules LaunchPad

Decoder State Machine as documented in TI RM46 TRM

RM46 decoder config in HALCoGen

On a Papilio with Xilinx Spartan 6

FPGA PWM output Signal capture

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