KA SPENCER - Wiltshire, UK
Telephone: (+44) (0)843 289 9728
Email: kas at kaspencer dot com

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for sale 2 - (scroll & read me)


KA Spencer offers components for sale to those who wish to equip their Hauptwerk organs with Automatic Electronic Stop Labelling.
The components which are not available anywhere elase are offered as a Core Components Kit. With other, readily available
components, and the accompanying Core Kit Construction Manual, a cost-effective solution to the labelling of stops with multiple Hautpwerk sample sets is overcome!
READY BUILT ESL PROJECTS I occasionally have ready built kits, assembled, wired and tested, with 60 illuminated stop switches,
OLEDs (labelling 60 stops) on 3 bespoke PCBs, and an Arduino Due with the kasLABs software installed. Just a USB cable connects to your Hauptwerk PC for the stop labelling, and PCB Sockets are included for connnection to your MIDI Encoder and Decoder. The next set will be available by the end of July 2022.
Prices are: make an offer around 500 (per stop plate) and they could be yours!


A Core Components Kit can be purchased from KASpencer, and you source the rest of the items yourself. You would then assemble
the stop plate according to the instructions in the Electronic Labelling for Hauptwerk Organs Construction Manual.
The CORE KIT CONSTRUCTION MANUAL costs 17 + P&P and is available frome the link immediately above.
When you have read the manual and are sure that you can build the project, you may order
the core kit of components which are
described below.
Prices were correct at the time of writing, but you are advised to check prices before confirming your order.

1.1 Stop Plates
These are available in quality beech ply, and black acrylic, which is a little more expensive.
One plate is required per stop jamb. They are of high quality, and professionally cut by laser, and supports up to 70 stops per jamb.

Prices are: Acrylic: 85 each; Beech Ply: 75 each, + P&P.

The plates have circular apertures for fitting the illuminated stop switches (or solenoid drawstops), and rectangular for the display
of the OLED labels,

Scroll down to see the images of he two plates: on the left is shown the acrylic plate, fitted with the OLED displays and illuminated stop switches. On the right is shown the beech ply version, with just two illuminated stop switches in place.

                             On the right is shown the beech ply version, with just two illuminated stop switches in place.

                                                                (Scroll down for details of the printed circuit boards).

1.3 The Arduino Due(s) and kasLABS software

The labelling system is driven by an Arduino Due microcomputer, under the control of purpose-designed software, kasLABS v3.x. The Arduino connects to the three PCBs via special cables, which you makeup as part pf the project, using 40-way DIL IDC connectors and 40-way ribbon cable. The cables are all illustrated and described very clearly in the Core Kit Construction Manual.

The image below illustrates the connections between the Arduino Due and the three PCBs. Other pictures in the Core Kit Construction Manual provide further clarification, as do also the online YouTube videos.

You will need two Arduino Dues, each with the software installed, if you build two stop jambs. You may also send in your own Arduino
Due(s) and have the soiftare installed for a small additional charge. The Dues are supplied with USB Device Names to identify which Due should be in your left jamb, and which in your right. Therefore, if you are ordering only one Arduino Due, please indicate whether you are building a left or a rignt jamb. This will ensure that your stop label text is formatted and justified to best suit the position of your stop

Prices are:
per single Arduino Due including kasLABs software installed and tested 70 + P&P.
per single copy of kasLABS software installed into your own Arduino Due and tested 35 +P&P.
(Please note: to have your own Arduino Due loaded with the software, you must provide return postage included with your P&P).

Adding the Illuminated Stop Switches

If you do not already have stop jambs with suitable illuminated stop switches (or solenoid driven drawstops), you will have to install 60
on each stop plate.

For the Illuminated Stop Switches, you will need to source and purchase:
     -    60x 1.3" round illuminated switches for 60 stops;
     - 240x spade connectors 120 red, 120 blue for 60 stops;
     - connectors for your chosen encoder & decoder (eg 6 20-way ribbon cables, each with 20-way (DIL 2 x 10)  IDC plugs at the ESL
       PCB end, and sockets appropriate to your Encoder/Decoder at the En/De/coder end;
     -   1 x 64-port MIDI encoder;
     -   1 x 64-port MIDI decoder;
     -   1 x 5v PSU, 1 x 9-12v PSU, 1 x USB cable (micro-B to B-plug);
     - a good supply of 0.05" 40-way ribbon cable and 3mm heat shrink tubing.

Each switch will have to be wired to an input of a 60-way MIDI Encoder: a suitable scheme is described in detail, including connectors and ribbon cable between the switches and the Encoder.
The LED in each switch body must be wired to an output of a 60-way MIDI Decoder: s suitable scheme is described for this too, along with
a ribbon cable for the connections between each LED and the Decoder.
The PSU will connect to the commoned +ve or -ve terminals (according to whether you have a "Common +ve" or "Common -ve" Decoder) of the LEDs, whilst their other terminal connects to the Decoder outputs. The cables & connectors for connecting the switches & LEDs are stated as the third item in the list immediately above. The Core Kit Component Manual will help with all that too.

The Core Kit Construction Manual explains exactly how to do all of the above, and how to integrate the switches with the PCBs.
Further help is available in a series of 5 YouTube videos, here: Electronic Stop Labels for Hauptwerk

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