DFR0075

DFR0075 Datasheet

ADKeyboard Module SKU DFR0075

Part	Datasheet
DFR0075	DFR0075 (pdf)

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ADKeyboard Module SKU DFR0075 ADKeyboard Module SKU DFR0075 Contents • 1 Introduction • 2 Specifications • 3 Pin out Diagram • 4 Wiring Diagram • 5 Sample Code Introduction This keyboard uses an analog input to read the five key state which saves IO resource for the Arduino. It can be used together with our IO Expansion Shield_For Arduino V5 _ SKU:_DFR0088 to make amazing interactive project. Specifications • Supply voltage 5V • Interface Analog • Size 40x33mm Pin out Diagram Wiring Diagram Sample Code //ADKeyboard Module //Developed by DFRobot.com //Last modified 30/11/2011 //Version int adc_key_val[5] 700, 800, 900 int NUM_KEYS = 5 int adc_key_in int key=-1 int oldkey=-1 void setup pinMode 13, OUTPUT //we'll use the debug LED to output a heartbeat Serial.begin 9600 // 9600 bps void loop adc_key_in = analogRead 0 // read the value from the sensor digitalWrite 13,LOW key = get_key adc_key_in // convert into key press if key != oldkey // if keypress is detected delay 50 // wait for debounce time adc_key_in = analogRead 0 // read the value from the sensor key = get_key adc_key_in // convert into key press if key != oldkey = key if key digitalWrite 13,HIGH switch key case 0:Serial.println "S1 OK" break; case 1:Serial.println "S2 OK" break; case 2:Serial.println "S3 OK" break; case 3:Serial.println "S4 OK" break; case 4:Serial.println "S5 OK" break; delay 100 // Convert ADC value to key number int get_key unsigned int input int k for k = 0 k < NUM_KEYS k++ if input < adc_key_val[k] return k if k >= NUM_KEYS k = -1 // No valid key pressed return k; Powered By DFRobot 2008-2017

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ADKeyboard Module SKU DFR0075

ADKeyboard Module SKU DFR0075

Contents
• 1 Introduction
• 2 Specifications
• 3 Pin out Diagram
• 4 Wiring Diagram
• 5 Sample Code

Introduction

This keyboard uses an analog input to read the five key state which saves IO resource for the Arduino. It can be used together with our IO Expansion Shield_For Arduino V5 _ SKU:_DFR0088 to make amazing interactive project.

Specifications
• Supply voltage 5V
• Interface Analog
• Size 40x33mm

Pin out Diagram Wiring Diagram

Sample Code
//ADKeyboard Module //Developed by DFRobot.com //Last modified 30/11/2011 //Version int adc_key_val[5] 700, 800, 900 int NUM_KEYS = 5 int adc_key_in int key=-1 int oldkey=-1 void setup
pinMode 13, OUTPUT //we'll use the debug LED to output a heartbeat Serial.begin 9600 // 9600 bps
void loop
adc_key_in = analogRead 0 // read the value from the sensor digitalWrite 13,LOW key = get_key adc_key_in // convert into key press
if key != oldkey // if keypress is detected delay 50 // wait for debounce time adc_key_in = analogRead 0 // read the value from the sensor key = get_key adc_key_in // convert into key press if key != oldkey = key if key digitalWrite 13,HIGH switch key
case 0:Serial.println "S1 OK" break;
case 1:Serial.println "S2 OK" break;
case 2:Serial.println "S3 OK" break;
case 3:Serial.println "S4 OK" break;
case 4:Serial.println "S5 OK" break;
delay 100 // Convert ADC value to key number int get_key unsigned int input int k for k = 0 k < NUM_KEYS k++ if input < adc_key_val[k]
return k if k >= NUM_KEYS k = -1 // No valid key pressed return k;

Powered By DFRobot 2008-2017

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Datasheet ID: DFR0075 508634