Using the E1103:
This kit is designed for the evaluation and development of applications using the QT1103-ISG
Integrated Circuit (IC). In this example the QT1103-ISG is run in Simplified mode.
Refer to the QT1103-ISG datasheet for details (see www.qprox.com/downloads).
• Ensure the E1103 Keyboard PCB is connected to J2 on the E1103 Main PCB.
• Select desired Adjacent Key Suppression (AKS) mode by moving the 2-way Jumper at J1.
• Insert the battery provided into the battery holder on the E1103 Main board.
Ensure that the battery has the correct orientation (negative (-) side to board) or the E1103
will not work.
• Touch ON/OFF - The LED (D11) under the standoff will illuminate to indicate power to
QT1103-ISG.
• Touch any of the 10 key(s) on the E1103 keyboard and the corresponding LED(s) will
illuminate.
Auto Power-Off: The E1103 will power off after approximately 15 minutes. (Using the auto shut-off
features of the QT102-ISG fitted)
An external power supply can be used instead of a battery.
WARNING: if an external power supply is used then the battery MUST be removed.
Schematic:
AKS Mode:
On the E1103, AKS is a global setting. Refer to the QT1103-ISG datasheet for details.
The AKS mode is changed by moving the 2-way Jumper fitted to J1 as indicated.
• If set to 'On': When touching multiple keys, only the LED associated with the key with the
strongest signal is lit.
• If set to 'Off': When touching multiple keys, all associated LEDs will be lit.
External Input:
The E1103 can be connected to User electrodes, using connector J2.
The values of C1-C10 (sample capacitors) may require changing.
External Output:
The output of the QT1103-ISG can be accessed using J3. The tracks at LK1-4 can be cut to
disconnect the QT1103-ISG from U3, which is the IC used to used to drive the LEDs on the
E1103 Main Board.
Troubleshooting:
Problem
Potential Solution
E1103 does not work If the Power LED is off, the 15 minute timeout may have
been exceeded. Touch ON/OFF to restore power.
If using a battery, check that the negative (-) side is facing
the board.
Check/replace battery.
If using an external power supply, check that the correct
connections have been made.
(Ensure the battery has been removed)
LED(s) stuck on After changing AKS Jumper position,
turn power off, then on again.
After replacing the E1103 Keyboard, turn the power off,
then on again.
AKS Mode unchanged after
changing Jumper position
Turn power off, then on again.
Incorrect LED(s) light when
keys touched
Check J2 connector pins on E1103 Main PCB
and E1103 Keyboard are correctly aligned.
E1103 Kit Contents:
1x E1103 Evaluation Assembly
(E1103 Main PCB and E1103 Keyboard PCB)
1x CR2032 Battery, 3V, 235mAh
2x sample QT1103-ISG ICs
1x E1103 User Guide
Packed by: Dated:
Corporate Headquarters: North America: Developers:
John Dubery, Kevin Snoad
1 Mitchell Point 651 Holiday Drive Bldg 5/300
Ensign Way, Hamble Pittsburgh, PA 15220 Copyright © 2007-2008 QRG Ltd.
Southampton SO31 4RF USA All rights reserved
United Kingdom Patented and patents pending
Tel:+44 (0)23 8056 5600 Tel:412-391-7367 www.qprox.com
Fax:+44 (0)23 8045 3939 Fax:412-291-1015 REV 201.0108
