Celtic Magic G-Click User manual
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USER MANUAL
Ver 100322
G-Click
Articulated Movement Detection
Gyroscopic Tilt Switch
Zero Force
Auto Posioning
Acousc feedback
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1 Introducon
1.1 What is a G-Click switch
1.2 G-Click vs a regular mechanical switch
1.3 Disadvantages of a Gyro switching
1.4 Outputs
1.4.1 USB outputs
1.4.2 Relay output & toggling
1.4.3 Audio / Bleep feedback
1.5 Auto Posioning Feature
1.6 Powering the G-Click
1.7 Freeze state
1.8 Manual calibraon
2 Hardware
3 Conguring
3.1 Prinng the Current Conguraon
3.2 Output style
3.3 Detecon Direcon
3.4 Beep style
3.5 Miscellaneous
4 Operaon
4.1 Seng Up
4.2 Movement Alarms
4.2.1 Excessive movement detected in trigger direcon
4.2.2 Excessive backward movement detected
4.2.3 Extreme movement detected—Auto Calibrang
4.3 Using the G-Click: Freeze & Manual Calibrate
4.4 Using the G-Click: Run
4.5 Operang Bargraph Paerns
5 Mounng the Gyro Sensor
51. Using the clip supplied
5.2 Mounng using magnets
6 Specicaon & Support
6.1 Dimensions
6.2 Support
6.3 Spec details
6.4 Legal & Conformity
6.5 Warranty
G-Click Manual Contents Warnings
Your G-Click is
designed for PC /
Tablet / phone
control only, and
should not be used
for a life safety
applicaon such as
controlling a wheel-
chair or machinery.
Avoid leaving in
direct sunlight.
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1 Introduction
1.1 What is a G-Click switch
The G-Click is a special switch that operates in free space unlike mechanical
switches and buons which are mounted from a bracket or sit on a desk.
The G-Click sensor is
normally mounted on the
user, and moves with the
user from any appropriate
part of their body that can
generate lt.
The G-Click creates its
own reference in free
space using a miniature
gyroscope that can detect
a ny amount of lt.
IMPORTANT, the G-click
detects lt not up, down
or sideways moon. To be precise the G-Click will detect the rate of change
of lt in a chosen direcon, and dependant on the sensivity set will trigger
an output. See 1.4 below.
1.2 G-Click vs a regular mechanical switch
The G-Click oers Auto Posioning (see 1.5 below). Unlike a convenonal
switch that can be pressed and held a G-Click can only send a ’click’ ie a
transient on then o. Although, it is possible to congure a G-Click to
toggle its relay on then o based on two click acons.
1.3 Disadvantages of a Gyro switching
As the sensor takes its reference from free space it is not suitable for use
whilst moving such as on a moving wheelchair or transport.
1.4 Outputs
1.4.1 USB
From the USB, and can be either one of three ascii keyboard characters or a
mouse click and these are supported by most Pc/Mac/ tablets & phones
1.4.2 Relay & relay toggling
Relay output is the same as a mechanical switch. This is normally pulsed or
Gyro Module
Control Module
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it can be toggled On and O, where On requires a click then another click
turns the relay back to O.
If the Relay is le on for longer than I minute it will auto clear to O.
1.4.3 Audio / Bleep feedback
The G-Click has a small sounder incorporated which indicates when an
output or a calibraon is occurring. This sound can be congured to suit
the user including being muted. See secon 3
1.5 Auto Posioning Feature
If a user changes posion slightly whilst using a G-Click, the G-Click will self
compensates and if the movement is signicant it will trigger an auto
recalibraon. The G-Click will then connue to operate without the need
for human intervenon to realign it as would be required with a
convenonal switch.
1.6 Powering the G-Click
The G-Click takes its power from the USB connecon and this is required to
be connected at all mes even if a USB trigger signal is not used. It can
alternavely be powered from a USB power source such as a USB mains
adaptor or a USB Baery Power Pack such as oen used to charge mobile
phones.
If taking power from a Microso Adapve Controller (XAC): The G-Click
output must be set to Relay only else the XAC will get confused by the
unexpected data that the G-Click will send down the USB connecon.
Once powered the G-Clcik will enter its Freeze state (two yellow leds) and is
released by pressing the buon once.
1.7 Freeze state
It is useful to be able to temporarily disable the G-Click whilst seng the
device up for a user or at the end of the day. With a single press of the
buon the G-Click will enter Freeze state (two yellow leds) and all acvity
will be suspended unl a second buon press releasing the Freeze state.
See secon 4.3.
1.8 Manual calibraon
Whilst using the device a double press of the buon will force a fresh
calibraon.
Tip : Use Manual Calibraon if the G-click was accidently moved during
an auto calibraon process.
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2 Hardware
Push Buon
Freeze / Run
Manual Calibrate &
Congure
Sensivity
Max = clockwise
Bargraph
Background colour
is green indicang
Tilt down is being
detected and the
bright level of the
bar indicates the
magnitude of lt.
See 4.2 for Alarms
USB
Relay Output
3.5mm jack socket
To Gyro Sensor
Tilt Down : green
Tilt Up : blue
Tilt Right Down : yellow
Tilt Le Down : purple
Rotate clockwise : cyan
The Gyro Sensor can be con-
gured to detect lt in ve dier-
ent direcons.
The detecon direcon is indicated
by the background colour of the
bar graph display whilst running.
The
Control
Module
Top led is red
when the relay
operates & a USB
output occurs
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3 Configuring
Conguraon
prints see 3.1
Conguraon
prints see 3.1
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3.1 Prinng the Current Conguraon
On your PC start your favourite word processor such as MS Word or
Notepad and make sure it is in focus ( ie click on the page ready to type) .
When the G-Click is frozen (two yellow leds) press and hold the buon
unl two red lids light (approx 6 seconds). The current conguraon will
then be typed into the open word processor document.
The conguraon will also be typed when the G-Click enters and laves
the conguraon ulity as per 3.0 above.
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3.2 Output style
This congures the USB communicaon to the host computer.
It can be a keyboard character or a le mouse click.
It can also be turned o if only the relay is required.
The relay will operate at all mes and is not aected by the USB output
selected.
3.3 Detecon Direcon
This selects the direcon of lt for the gyro to trigger an output.
See the Hardware secon 2 above for illustraons.
3.4 Beep style
The sounder can be turned completely o (not recommended) or just allow
the alarm beeps such as calibrang. It is also possible to change the
duraon of the beep for a valid click.
3.5 Miscellaneous
This selects the behaviour of the relay output from transient to toggling on-
o-on-o with each clicks.
The other opon is to reset all conguraons back to factory defaults.
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4 Operation
4.1 Seng Up
It is very important to appreciate that the G-Click detects TILT not horizontal
or vercal movements. The users opmal movements must be carefully
considered such as the G-Click ‘sees’ the maximum TILT from the users best
movement. This may be from any part of the body and the sensivity ad-
justed to suit.
The Gyro Sensor can be congured to detect in one of ve direcons of lt.
The default is the lt down. The direcon programmed is indicated by the
background colour of the bar graph display, the default being Green for lt
down. These opons are:
Green: Tilt down—default
Blue: Tilt up
Yellow: Right side down
Purple: Le side down
Cyan (light blue) Rotate clockwise
See the Hardware secon 2
Seng the Sensivity
The sensivity knob should be fairly carefully set. If set too low (an clock-
wise) it is easy to appreciate that it will not work. However if set too high
the consequences are a lile more subtle.
As the G-Click is using a rate of change of lt then if the sensivity is set too
high for a given movement it will trigger and if the G-Click is connuing to
move in the triggering direcon then another click or more could occur.
Therefore it is important to set the gain appropriately for the clients needs
and no higher.
Tip: Start with minimal sensivity (Knob fully an clockwise) and increase the
knob unl the user reliably triggers the output.
If the sensivity is set too high then mulple clicks will occur
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4.3 Using the G-Click: Freeze & Manual Calibrate
Whilst the device is indicang Freeze (two yellow leds) posion the Gyro to
suit the user, once in posion press the reset buon once. This will release
the Freeze state & the G-Click will immediately calibrate itself to its current
posion ( 3 seconds - all leds red). The bleep, if enabled will sound four
mes when entering calibraon and one longer bleep when calibraon has
successfully completed. During the calibraon period the device should be
held steady.
The device is now running.
Freeze can be applied again by a single buon press and a recalibraon by
pressing twice. This is useful if the device was not steady during the previ-
ous calibraon.
4.2 Posion Alarms
In normal running alarms paerns below may be ashed on the LED dis-
play, if this is only occasionally there is nothing to worry about however
if frequent then acon may be required. The G-Click will self adjust & an
alarm may stay on for several seconds unl this adjustment has complet-
ed. The performance of the G-Click will be reduced whilst alarming.
4.2.1 Excessive movement detected in the trigger direcon
The user is managing to lt the gyro detector further than necessary to
cause a valid trigger. The Sensivity knob should be reduced (an
clockwise) to prevent mulple triggers.
4.2.2 Excessive backward movement detected
The gyro detector is moving backward from the direcon expected.
This may be due to an inadvertent movement by the user or carer .
A manual recalibraon (see 4.3) may be faster than waing.
4.2.3 Extreme movement detected—Auto Calibrang
The G-Click gyro has moved above the threshold that requires a minor
adjustment and a full auto recalibraon has been acvated.
There will be four bleeps and the gyro should be held sll unl this
calibraon has been completed signalled by one long bleep.
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Calibrang ve red leds
G-Click will calibrate to the cur-
rent posion (about 3 secs)
and then run. see 4.4 below.
Tip: Hold gyro steady during
this me
Freeze two yellow leds
G-Click will hold (no outputs)
awaing second buon press to
release
Pres
Press
Buon Acon
Release
Freeze
State Calibrang
4.4 Using the G-Click: Run
Following the calibraon the G-Click will dis-
play a dim background. This colour repre-
sents the direcon of lt to be detected, the
default is Green as shown is for lt down.
See secon 2 Hardware for angles of detec-
on.
As the gyro is lted a bright led bar of the
same colour represenng the magnitude of
lt being detected is displayed.
An output occurs when the top led turns red.
To return the G-Click to Freeze press the
buon once.
No lt Some
lt Ouput
trigger
4.3 Using the G-Click:
Freeze & Manual Calibrate
Connued
Run
Release
3 secs
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4.5 Operang Bargraph Paerns See secon 4.2 for
more details
Quick Start
Finger Tip
=
More Tilt
G-Click set
to detect
sideways
lt
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5 Mounting the Gyro Sensor
51. Using the clip supplied
There is no right or wrong method to mount the G-Click gyro sensor.
It is what works best for an individual. The G-Click s provided with a mounng clip
that the gyro module can be slid into.
The clip provide a means to aach the
gyro module using 2x 4mm bolts or
using a 20mm wide double sided
hoop & loop strap. Recommend
Velcro® ONE-WRAP® 20mm Strap
with the so face towards the skin.
Such a strap may be used to form
a loop around a nger, hand or
wrist. Ensure a suitable hygiene regime appropriate for the user is considered.
Clip provided
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Mounng Consideraons
With every installaon the Controller Module will be 600mm from the Gyro
sensor and it should be supported appropriately to avoid its weight pulling
the Gyro sensor.
When choosing a locaon on a user think…
“What movement from this person will cause the sensor to lt”
Inially look for lt down at the front of the sensor as this is the default di-
recon of detecon. If necessary this can be changed. See the Hardware &
Conguraon secon 2 for details.
Tip: Do not look for horizontal or vercal movement, as such moon will not
be reliably detected. IT MUST BE TILT
Typical locaons may be:
Fingers / Back of hand: Use the provided clip and Velcro ONE-WRAP
20mm strap
Watch: A watch face can be used as a convenient at face to mount
the gyro if the user can rotate their wrist.
Spectacles: Form a Velcro hoop tag around the spectacle right* leg
arm and aach the G-Click sensor at to this tag whilst seng the G-
Click to respond to le or right lt.
Finger p
=
More lt
=
Beer
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Tips for shoulder mounng
• Mount the G-Click as high as
possible on ght ng
clothing as shown above
• With the cable coming
downwards set to trigger to
detect Tilt Up (Blue back-
ground). See secon 2 of
this handbook
5.2 Mounng using magnets
For tricky mounng posions it is occasionally
useful to use small disk magnets to locate the
G-Click sensor, without using the clip, on to
the surface of clothing such as for shoulder
operaon.
Although Celc Magic can provide magnets on
request they are not rounely supplied with a
G-Click and this informaon is for guidance
only. See photo below for supplier.
Cauon when using magnets— Ensure user
has no pacemaker ed and beware that
small magnets can become a choking hazard
for children.
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6 Specification & Support
6.1 Dimensions
Celc Magic
G-Click GA
For the latest support
informaon please visit
the support webpage
www.celcmagic.org/G-
Click
6.2 Support
Clip
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6.3 Specicaons
Electrical
Connecon to computer USB
USB Max load 85mA
USB Lead length 1m
Fixed lead to Gyro 600mm
Relay connecon 3.5mm mono jack
Relay Output rang 24v @ 750mA ac/dc
Relay pulse me 250mS
Audio bleep >80dB @ 100mm
Sensor technology Solid state gyro
Angular resoluon 0.2 degree
Mechanical
Weight Sensor 10g
All 100g
Ingress rang IP42
Operang temperature 5C—35C
Storage Temperature -15C—40C
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On the advice of the UK Medicines & Healthcare products Regulatory Agency (MHRA), the G-Click has
been classed as a ‘Aid for Daily Living’ (not a medical device) and is deemed suitable for controlling a
personal computer, tablet, phone or Environmental Controller in a home environment. . MHRA Opinion
Reference E/2021/3585
Disclaimer: Terms and product names may be trademarks of
others. The informaon in this document is provided in con-
necon with Celc Magic products. No license, express or
implied or otherwise, to any intellectual property right is
granted by this document or in connecon with the sale of
Celc Magic products. Neither the whole nor any part of the
informaon contained in or the product described in this docu-
ment may be adapted or reproduced in any material form
except with the prior wrien permission of the copyright
holder, unless it is clearly stated by Celc Magic that the prod-
uct is licensed under the Open Source Hardware (OSHW) De-
nion 1.0. The product described in this document is subject
to connuous development and improvements. All parculars
of the product and its use contained in this document are
given by Celc Magic in good faith. However all warranes
implied or expressed including but not limited to implied war-
ranes of merchantability or tness for purpose are excluded.
This document is intended only to assist the reader in the use
of the product. Celc Magic shall not be liable for any loss or
damage arising from the use of any informaon in this docu-
ment or any error or omission in such informaon or any in-
correct use of the product.
6.4 Legal & Conformity
What Does This Warranty Cover?
This warranty covers any defects or malfuncons in your new G-Click.
How Long Does The Coverage Last?
This warranty lasts from one year of purchase date. Coverage terminates if you sell or
otherwise transfer the device.
What Will Celc Magic Do?
Celc Magic will replace any defecve or malfunconing part at no charge..
What Does This Warranty Not Cover?
Any other problem that is caused by abuse, misuse, or an act of God (such as a ood)
are not covered. Also, consequenal and incidental damages are not recoverable
under this warranty.
6.5 Celc Magic G-Click Limited Warranty
Manufacturer’s declaration of conformity
EU Declaration of Conformity
to ISO/IEC 17050-1
Manufacturers name: Celtic Magic
Manufacturers address: 126 Leicester. LE7 7JJ
Declares that this product:
Product Type: Tilt Switch
Product Name: G-Click
Product Options: none
Conforms to the following standards
EMC compatibility 2004/108/EC
Low voltage directive 2006/95/EC
General product safety 2001/95/EC
Supplementary Information:
This equipment complies with the requirements for the CE mark
Signature ________________________________________
Date of issue 15th November 2020
Mr Graham Law
Technical Lead
Celtic Magic Leicester
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