assembly instructions here

LED selection guide

drawings for top plate fabrication

40h keypad compatibility

firmware flash tutorial

enc assembly guide

• USB bus powered
• supports up to four 8×8 keypad grids, for a total of 16×16
• auxiliary ports for additional digital or analog i/o, such as knobs, joysticks, accelerometers, rotary encoders, switches, LEDs
• boot loader for easy firmware updates and customization, no external programmer needed
• open source firmware and schematics

we've designed a modular system which allows scalability and customization. the individual parts are:

• logic: hub which communicates with the computer and other connected modules. easy user firmware updates allow extended functionality.
• driver: helper electronics which light up the grid and collect keypad data. connects to the logic section with a single ribbon cable.
• keypad: 8×8 keypad surface, connects to the driver board directly. customizable LED color (not included).

one driver is needed per grid. for a full 8×8, you'd need 1 logic 1 driver 1 grid. a full 8×16 would require 1 logic 2 driver 2 grid. etc.

note that a full kit still requires the user to create or source a top plate and enclosure. past users have found fantastic creative solutions for mounting these kits– don't simply resort to purchasing a prefabricated enclosure before considering your options.

• pre-assembled surface mount components.
• pre-flashed with boot loader and standard firmware.
• very low profile. USB port is highest point.
• ribbon connectors are only needed soldering
• compatible with old 40h keypad kits (driver required).

• easy through-hole soldering required.
• includes ribbon cable for connection to logic.
• compatible with old 40h keypad kits (logic required).

• includes keypads, diodes, connectors, circuit board.
• user choice of LED color (not included)
• perfectly square and centered 6” x 6” circuit for easy tiling.
• surface mount connectors for low profile direct mounting of driver.
• multi-layer circuit board.
• compatible with old 40h logic kits by using male connectors.
• keypads are the same size as the original 40h and 40h kit. these are slightly larger than the series and grayscale keypads.

• available with knobs/caps/connectors or as a set of four blank boards
• easily attaches to mk logic board, can be used with or without grids attached
• low resolution encoder: bournes PEC12
• filter caps for noise reduction
• works seamlessly with serialosc using the same OSC protocol as the arc
• does not work with the original 40h kit

see the enc assembly guide

is it easy to assemble?

check out the assembly instructions.

yes, though i'd suggest reviewing a few soldering tutorials prior to beginning if it's your first soldering project. an overwhelming number of users have reported success with their kit assembly, and help is quickly available on the forums if you have a problem.

what kind of soldering iron do i need?

don't buy the absolute cheapest iron you can find– it'll create more headaches than you can imagine. a mid-range iron with temperature control will give good results. if soldering is something you plan to do more often, a nice iron is highly suggested. you can obtain one for around $100.