Seeed Grove User manual

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Grove - 4-Digit Display
Version：1.0
Release date：9/20/2015
Wiki: http://www.seeedstudio.com/wiki/Grove_-_4-Digit_Display
Bazaar: http://www.seeedstudio.com/depot/Grove-4Digit-Display-p-1198.html

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Document Revision History
Revision
Date
Author
Description
1.0
Sep 21, 2015
Victor.He
Create file

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Contents
Document Revision History···································································································2
1. Introduction ···················································································································2
2. Features··························································································································3
3. Application ideas············································································································4
4. Specifications ·················································································································5
5. Interface functions·········································································································6
6. Usage······························································································································7
6.1 With TI LaunchPad ············································································································ 7
6.2 With Arduino····················································································································· 8
6.3 With Raspberry Pi ··········································································································· 11
7. Resources ·····················································································································15
8. Related Projects ···········································································································16
9. Support·························································································································18

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Disclaimer
For physical injuries and possessions loss caused by those reasons which are not related to product quality,
such as operating without following manual guide, natural disasters or force majeure, we take no
responsibility for that.
Under the supervision of Seeed Technology Inc., this manual has been compiled and published which
covered the latest product description and specification. The content of this manual is subject to change
without notice.
Copyright
The design of this product (including software) and its accessories is under tutelage of laws. Any action to
violate relevant right of our product will be penalized through law. Please consciously observe relevant local
laws in the use of this product.

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1. Introduction
Grove - 4-Digit Display module is a 12-pin module. In this module, we utilise a TM1637 to scale down the
number of controlling pins to 2. That is to say, it controls both the content and the luminance via only 2
digital pins of Arduino or Seeeduino. For projects that require alpha-numeric display, this can be a nice
choice.

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2. Features
4 digit red alpha-numeric display
Grove compatible interface (3.3V/5V)
8 adjustable luminance levels

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3. Application ideas
Time display
Stopwatch
Sensors’ input display

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4. Specifications
Item
Min
Typical
Max
Unit
Voltage
3.3
5.0
5.5
VDC
Current
0.2
27
80
mA
Dimensions
42x24x14
mm
Net Weight
7±1
g

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5. Interface functions
Grove interface - Can be connected to digital port on Grove - Base Shield.
4 - Digit display - Common anode digital tube.
Pin definition: CLK DIO VCC GND

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6. Usage
6.1 With TI LaunchPad
Displaying the Numbers (4-Digital-Display)
This example demonstrates how to display some digital numbers using a Grove-4-Digital Display.
/*
* TM1637.cpp
* A library for the 4 digit display
*/
#include "TM1637.h"
#define CLK 39 //pins definitions for TM1637 and can be changed to other
ports
#define DIO 38
TM1637 tm1637(CLK,DIO);
void setup()
{
tm1637.init();
tm1637.set(BRIGHT_TYPICAL);//BRIGHT_TYPICAL = 2,BRIGHT_DARKEST =
0,BRIGHTEST = 7;
}
void loop()
{
int8_t NumTab[] =
{0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};//0~9,A,b,C,d,E,F