Geachte
Ik heb een led matrix gekocht om te programmeren met Arduino.Ik heb alles ondertussen juist verbonden, maar ik stuit altijd op hetzelfde probleem.
Als ik in mijn testcode twee leds oplicht zijn er twee andere leds die ook branden met een lagere helderheid. Ik heb geprobeerd om de volledige matrix uit te schakelen tussen de loops, weerstanden verplaatsen van rijen naar kolommen, maar dit verhelpt het probleem niet.
// Datasheet and ledmatrix I used
//http://www.farnell.com/datasheets/1631380.pdf (703-0194)
//Source: http://www.local-guru.net/blog/2009/04/03/5x7-led-matrix-on-my-arduino
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
---Diagram of led matrix---
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
The numbers are the pins of the led matrix. The "O" are the leds.
14 13 12 11 10 9 8
O O O O O
O O O O O
O O O O O
O O O O O
O O O O O
1 2 3 4 5 6 7
%%%%%%%%%%%%
---Wiring---
%%%%%%%%%%%%
This is the syntax:
==> Arduino Digital OUT | MATRIX Pin in (row/column *number*) <==
2|9 (row 1)
3|14 (row 2)
4|8 (row 3)
5|12 OR 5, they're connected! (row 4)
6|1 (row 5)
7|7 (row 6)
8|2 (row 7)
9|13 (col 1)
10|3 (col 2)
11|4 OR 11, they're connected!(col 3)
12|10 (col 4)
13|6 (col 5)
You have to connect for example pin 2 with pin 9 of the led matrix (watch the scematic), that's the second from right
*/
int c1 = 9; //column 1, pin 9 of arduino
int c2 = 10;
int c3 = 11;
int c4 = 12;
int c5 = 13;
int r1 = 2; //row 1, pin 2 of arduino
int r2 = 3;
int r3 = 4;
int r4 = 5;
int r5 = 6;
int r6 = 7;
int r7 = 8;
//%%%%%%%%%%%%
//---Setup---
//%%%%%%%%%%%%
void setup() {
//These are the columns
pinMode( 9, OUTPUT );
pinMode( 10, OUTPUT );
pinMode( 11, OUTPUT );
pinMode( 12, OUTPUT );
pinMode( 13, OUTPUT );
//These are the rows
pinMode( 2, OUTPUT );
pinMode( 3, OUTPUT );
pinMode( 4, OUTPUT );
pinMode( 5, OUTPUT );
pinMode( 6, OUTPUT );
pinMode( 7, OUTPUT );
pinMode( 8, OUTPUT );
}
void loop() {
//light up r1,c1
digitalWrite(r1,LOW);
digitalWrite(r2,HIGH);
digitalWrite(r3,HIGH);
digitalWrite(r4,HIGH);
digitalWrite(r5,HIGH);
digitalWrite(r6,HIGH);
digitalWrite(r7,HIGH);
digitalWrite(c1, HIGH);
digitalWrite(c2, LOW);
digitalWrite(c3, LOW);
digitalWrite(c4, LOW);
digitalWrite(c5, LOW);
delay(10);
//light up r5,c4
digitalWrite(r1,HIGH);
digitalWrite(r2,HIGH);
digitalWrite(r3,HIGH);
digitalWrite(r4,HIGH);
digitalWrite(r5,LOW);
digitalWrite(r6,HIGH);
digitalWrite(r7,HIGH);
digitalWrite(c1, LOW);
digitalWrite(c2, LOW);
digitalWrite(c3, LOW);
digitalWrite(c4, HIGH);
digitalWrite(c5, LOW);
delay(10);
}
De onderstaande link is de link naar de datasheet.
http://www.farnell.com/datasheets/1631380.pdf (703-0194)
Er is een soort van traagheid waardoor die leds toch nog stroom krijgen. Komt dit door de led matrix, mijn Funduino Nano of iets anders?
Met vriendelijke groeten
