• Introduction
• PCB assembly
• TypK circuit calibration
• Connect the LCD and the Buttons
• Install the software
• Connect the sensors

Introduction

This should give a short guide how to make one MultiDisplay :)

PCB assembly

How to make the PCB´s:

Build the MD01, the main Print

Build the MD02, the interface Print

Build the MD03, the sensor Print

TypK circuit calibration

on the MD03 print the amplifier gain from the LTC1050 must be set to 95, but its easy to do :)

• Step 1

Measure the real resistance of R11

it should be 100, but you need to measure it at least down to 0.1 Ohm (like 99.5Ohms)

• Step 2

Calculate the total Value of R7 and R8(Potentiometer)

The calculation is simple: R7+R8 = (R11*95)-R11 For our example: R7+R8 = (100*95)-100 = (9500)-100 = 9400

So we need to set R7 and R8 to 9400Ohms.

• Step 3

Set R7 and R8 to the calculated value.

on IC3 (LTC1050) Pin 2 and Pin 6, marked red , you can measure R7 and R8.

The measurement must be done without the LTC1050 chip installed!!!

So put your probes in Pin 2 and Pin 6, then take a screwdriver and adjust R8 (marked yellow)

Adjust as close as you can to get the calculated value.

Done :)

Connect the LCD and the Buttons

Connect the LCD and the Buttons like described here: Interface

Install the software

checkout the latest build from the SVN, and make shure you have the Arduino19 IDE (above does not work)

Update the Arduino Files with the one from the SVN: http://code.google.com/p/multidisplay/source/browse/#svn/trunk/libs

Build it, and load it into the Arduino!

the latest release is this one: http://code.google.com/p/multidisplay/source/browse/#svn/branches/md_002p0

Connect the sensors

Connect all the sensors like described here: Connect the Sensors

Done!