Hallo a few days ago i received my arduinix kit. To day i finished the assembly. At first everything work fine. but after a couple of minutes one of the tubes started showing multiple numbers randomly.
After i made sure there wasnt any short i swaped the K155NA1 chips and the problem moved to the other tube. So the K155NA1 is most propably dead. Is it so easy for the K155NA1 to die like this?
I am attaching a picture and the arduino code i used to test the arduinix.
/*
Blink
Turns on an LED on for one second, then off for one second, repeatedly.
This example code is in the public domain.
*/
// SN74141 (1)
int ledPin_0_a = 2;
int ledPin_0_b = 3;
int ledPin_0_c = 4;
int ledPin_0_d = 5;
// SN74141 (2)
int ledPin_1_a = 6;
int ledPin_1_b = 7;
int ledPin_1_c = 8;
int ledPin_1_d = 9;
// anod pins
int ledPin_a_1 = 10;
int ledPin_a_2 = 11;
int ledPin_a_3 = 12;
void setup() {
pinMode(ledPin_0_a, OUTPUT);
pinMode(ledPin_0_b, OUTPUT);
pinMode(ledPin_0_c, OUTPUT);
pinMode(ledPin_0_d, OUTPUT);
pinMode(ledPin_1_a, OUTPUT);
pinMode(ledPin_1_b, OUTPUT);
pinMode(ledPin_1_c, OUTPUT);
pinMode(ledPin_1_d, OUTPUT);
pinMode(ledPin_a_1, OUTPUT);
pinMode(ledPin_a_2, OUTPUT);
pinMode(ledPin_a_3, OUTPUT);
}
void loop() {
for (int i=0;i<10;i++) {
displaynum (i);
delay (2000);
}
}
void displaynum( int num ) {
int a,b,c,d;
// Load the a,b,c,d.. to send to the SN74141 IC (2)
switch( num )
{
case 0: a=0;b=0;c=0;d=0;break;
case 1: a=1;b=0;c=0;d=0;break;
case 2: a=0;b=1;c=0;d=0;break;
case 3: a=1;b=1;c=0;d=0;break;
case 4: a=0;b=0;c=1;d=0;break;
case 5: a=1;b=0;c=1;d=0;break;
case 6: a=0;b=1;c=1;d=0;break;
case 7: a=1;b=1;c=1;d=0;break;
case 8: a=0;b=0;c=0;d=1;break;
case 9: a=1;b=0;c=0;d=1;break;
}
digitalWrite(ledPin_0_d, d);
digitalWrite(ledPin_0_c, c);
digitalWrite(ledPin_0_b, b);
digitalWrite(ledPin_0_a, a);
// Write to output pins
digitalWrite(ledPin_1_d, d);
digitalWrite(ledPin_1_c, c);
digitalWrite(ledPin_1_b, b);
digitalWrite(ledPin_1_a, a);
}
