Expander boards are specific scanner boards that cannot work standalone, instead they expand keys range of the board they are connected to. Connection is made allways with 4-wire thin cable to main controller board. The cable comes with the axpander board. Function of the expander is allways determined by the main controller, so depending on where it is connected it can be another keyboard, or panelboard for sending program change messages etc. All of them are hot-pluggable, meaning they can be changed without removing power from main controller.

MIDI4D 32-keys matrix driver

It's a small board usually installed in pedalboard. It drives 8x4 diode matrix, covering 32-keys range. The diode matrix must be arranged in such way so there are 8 leads to anodes and 4 leads to cathodes. Order of the keys and their assignement to notes is arbitrary and can be customized. Standard keyboard layout is shown in this schematic. It fits small diode matrix described below.
When placing order, please specify cable length required. Price 25EUR.

AMTX64X 64-keys scanner

This product is discontinued, available only on request for increased price of 70EUR.
AMTX64X stands for Active Matrix 64-keys, Expander version. This is the scanner for 5-octave keyboard. Keys must be arranged in common 8x8 matrix, i.e. 8 keys in a row have one pole connected together, and the other go to their corresponding pin, so 9 wires from the board for each group of 8 keys. Keyboard is connected using four 20-pin IDCs. One connector covers 16 keys. See the pinout of the board and keys connection diagram.
This is non-stocked item, made on request. When placing order, please specify cable length required. Price 70EUR

BBS64-1K busbar scanner

BBS-1K stands for Bus Bar Scanner for one keyboard. It has daisy-chain input, so another scanner can be connected to it. This way you can connect up to 8 keyboards, 64 potentiometers and control keypad to MRG1 controller board, which has only 4 inputs. Keys can have one pole of each contact connected to ground, that's typical setup in older organ consoles. Keyboard is connected using four 16-pin IDCs. One connector covers 16 keys. See the keys connection diagram.
When placing order, please specify cable length required. Price 50EUR

BBS64X, BBS48X and BBS32X busbar scanners

BBSX stands for Bus Bar Scanner, eXpander version. This scanner comes in 4 sizes: 16, 32, 48 and 64 keys. Only last 3 are shown above. There's an option of split scanner, that when connected to master MIDI controller, it behaves like dual keyboard, with different channels and starting note in lower and upper split. The split point is however hardprogrammed, and cannot be changed after making order. Keys can have one pole of each contact connected to ground, that's typical setup in older organ consoles. Keyboard is connected using four 16-pin IDCs. One connector covers 16 keys. See the pinout of the 64-inputs board and keys connection diagram.
When placing order, please specify cable length required and split point (highest key of lower split) if split is required. Price 45EUR for 64 inputs, 40EUR for 48 inputs, 35EUR for 32 inputs, 30EUR for 16 inputs

MIDI128X dual 64-keys matrix driver

This is the matrix driver scanner for dual 5-octave keyboard. IT connects to keyboards with typical diode matrix, or diode matrix board described below. Keys must be arranged in typical 8x8 diode matrix. Keyboards are connected using two 16-pin IDCs. Anodes of the matrix go to odd pins of the connector, while cathodes go to even pins. Order of the keys can be customized. See the pinout of the board.
When placing order, please specify cable length required. Price 40EUR

POT3 - expander for 3 analog inputs or potentiometers

This micro board adds 3 potentiometers to controllers supporting analog input expander, i.e. MRG1, MRG3, POT32. 3 inputs is usually enough for most of organ consoles, so this cheap addendum is ideal for solutions with MRG3 as master controller. Pots are connected to 5 pin header. Price 10EUR

POT12 - expander for 12 analog inputs or potentiometers

This small board adds 12 potentiometers to controllers supporting analog input expander, i.e. MRG1, MRG3, POT32. It has also daisy-chain input, and up to 5 boards can be used to form a chain of controllers for 60 potentiometers, however it's mostly destined for MIDI system with much less than that. It's better to use POT32X below for number of inputs higher than 24. Pots are connected to single 14 pin header. First 2 pins are for connecting potentiometer taper end, while remaining 12 are inputs for their wipers. Price 10EUR

POT32X - expander for 32 analog inputs or potentiometers

This board adds 32 potentiometers to controllers supporting this number of pots, i.e. MIDI128, MRG1, POT32. Pots are connected to 2 20-pin connectors, each taking care of 16 pots. It has a "daisy-chain" input, that means it can be connected in between the Controller board and another scanner, hence 2 scanner 4-pin connectors. Price 40EUR

numeric keypad - used for setting up the system

This beautiful small keypad can be used to set all parameters of the MIDI setup like channel or controller type. It is common key scanner, but with numbered keys atached. It is easier to use when entering numeric values, than typical musical keyboard. It can also generate Program Change messages. It works with the following MIDI controllers: MRG1, POT32, AMTX64. It can be used also with PEDSCAN board, but then it works as single potentiometer MIDI converter with no keyboard. When connected to other boards, it can generate only notes. Price 20EUR

LITSW - LEDs and buttons interface

Button scanner and LEDs driver combined. 24 inputs and 24 outputs. Usable for stops/pistons in organ emulators and other application where you want to have illuminated indicators for specific MIDI functions. More info.
Price 40EUR

DMTX32 32-key matrix board

This product is discontinued, available only on request for increased price of 10EUR.
it mates with the smallest expander - MIDI4D described at the top. It contains two 20-pin headers for connecting keys via flat cables. It is attached to the matrix driver by 12-pin 1-line header. It usually comes with matrix driver (MIDI4D) soldered in, but if required, they can be separate, tied together using tie-wrap.
Price 10EUR

DMTX64 64-key matrix board

This product is discontinued, available only on request for increased price of 20EUR.
This is plain 8x8 diode matrix for use in dual keyboard controller. It connects to the mainboard via 16-wire flat cable and has four 20-pin IDC headers to connect to the keys. Each header covers 16 keys.
Price 20EUR