Velleman VMA203 User Manual Download Page 2

 

VMA203 

V. 02 – 16/01/2019 

©Velleman nv 

USER MANUAL 

1.

 

Introduction 

To all residents of the European Union 
Important environmental information about this product 

This symbol on the device or the package indicates that disposal of the device after its lifecycle could 
harm the environment. Do not dispose of the unit (or batteries) as unsorted municipal waste; it 
should be taken to a specialized company for recycling. This device should be returned to your 
distributor or to a local recycling service. Respect the local environmental rules. 

If

 

in doubt, contact your local waste disposal authorities. 

Thank you for choosing Velleman

®

! Please read the manual thoroughly before bringing this device into service. 

If the device was damaged in transit, do not install or use it and contact your dealer. 
 

2.

 

Safety Instructions 

 

 

This device can be used by children aged from 8 years and above, and persons with 
reduced physical, sensory or mental capabilities or lack of experience and knowledge if 
they have been given supervision or instruction concerning the use of the device in a 
safe way and understand the hazards involved. Children shall not play with the device. 
Cleaning and user maintenance shall not be made by children without supervision. 

 

 

 

Indoor use only. 
Keep away from rain, moisture, splashing and dripping liquids. 

 

3.

 

General Guidelines 

 

 

Refer to the Velleman

®

 Service and Quality Warranty on the last pages of this manual. 

 

Familiarise yourself with the functions of the device before actually using it. 

 

All modifications of the device are forbidden for safety reasons. Damage caused by user 
modifications to the device is not covered by the warranty. 

 

Only use the device for its intended purpose. Using the device in an unauthorised way 
will void the warranty. 

 

Damage caused by disregard of certain guidelines in this manual is not covered by the 
warranty and the dealer will not accept responsibility for any ensuing defects or 
problems. 

 

Nor Velleman nv nor its dealers can be held responsible for any damage (extraordinary, 
incidental or indirect) – of any nature (financial, physical…) arising from the possession, 
use or failure of this product.  

 

Due to constant product improvements, the actual product appearance might differ from 
the shown images.  

 

Product images are for illustrative purposes only. 

 

Do not switch the device on immediately after it has been exposed to changes in 
temperature. Protect the device against damage by leaving it switched off until it has 
reached room temperature. 

 

Keep this manual for future reference. 

 

Summary of Contents for VMA203

Page 1: ...VMA203 LCD KEYPAD SHIELD FOR ARDUINO LCD1602 USER MANUAL ...

Page 2: ...aning and user maintenance shall not be made by children without supervision Indoor use only Keep away from rain moisture splashing and dripping liquids 3 General Guidelines Refer to the Velleman Service and Quality Warranty on the last pages of this manual Familiarise yourself with the functions of the device before actually using it All modifications of the device are forbidden for safety reason...

Page 3: ...g something online You can tell your board what to do by sending a set of instructions to the microcontroller on the board To do so you use the Arduino programming language based on Wiring and the Arduino software IDE based on Processing Surf to www arduino cc and www arduino org for more information 5 Overview VMA203 The 16x2 LCD and keypad shield for Arduino Uno Mega Diecimila Duemilanove and Fr...

Page 4: ...ine btnDOWN 2 define btnLEFT 3 define btnSELECT 4 define btnNONE 5 read the buttons int read_LCD_buttons adc_key_in analogRead 0 read the value from the sensor my buttons when read are centered at these valies 0 144 329 504 741 we add approx 50 to those values and check to see if we are close if adc_key_in 1000 return btnNONE We make this the 1st option for speed reasons since it will be the most ...

Page 5: ...ve to the begining of the second line lcd_key read_LCD_buttons read the buttons switch lcd_key depending on which button was pushed we perform an action case btnRIGHT lcd print RIGHT break case btnLEFT if You need the word LEFT shown on the display than use lcd print LEFT instead of lcd print adc_key_in and lcd print v the following 2 lines will print the actual threshold voltage present at analog...

Page 6: ...s device For more info concerning this product and the latest version of this manual please visit our website www velleman eu The information in this manual is subject to change without prior notice COPYRIGHT NOTICE The copyright to this manual is owned by Velleman nv All worldwide rights reserved No part of this manual may be copied reproduced translated or reduced to any electronic medium or oth...

Page 7: ...n shocks falls dust dirt humidity and by the article as well as its contents e g data loss compensation for loss of profits consumable goods parts or accessories that are subject to an aging process during normal use such as batteries rechargeable non rechargeable built in or replaceable lamps rubber parts drive belts unlimited list flaws resulting from fire water damage lightning accident natural...

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