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Topic: Toggle LED with Switch (off same Adruino PIN) (Read 3338 times) previous topic - next topic



Below is the code which I used to create a multiplexer for Arduino - Console Shield

const int PIN9 = 9; //LED 1 and Push Button 1
const int PIN8 = 8; //LED 0 and Push Button 0

int SW1Count = 0;
int SW1State = 0;
int LSW1State = 0;

int SW0Count = 0;
int SW0State = 0;
int LSW0State = 0;

void setup () {
pinMode(PIN9, INPUT);
pinMode(PIN8, INPUT); 

void loop() {
  //Switch 1 and LED 1 (MSB Multiplexer)
SW1State = digitalRead(PIN9);

if (SW1State != LSW1State) {
if (SW1State == HIGH) {
  LSW1State = SW1State;

if (SW1Count == 1) {
digitalWrite(PIN9, HIGH);
pinMode(PIN9, INPUT);

if (SW1Count == 2) {
SW1Count = 0;

  //Switch 0 and LED 0 (LSB Multiplexer)
SW0State = digitalRead(PIN8);

if (SW0State != LSW0State) {
if (SW0State == HIGH) {
  LSW0State = SW0State;

if (SW0Count == 1) {
digitalWrite(PIN8, HIGH);
pinMode(PIN8, INPUT);

if (SW0Count == 2) {
SW0Count = 0;


Sorry there aren't any comments with the code just yet. I will populate with comments later this evening.




I checked over the code yesterday and tested it for some time to see if I could find any issues or errors.

The only issue I could find was in some instances when the LED is on when I push the button it doesn't seem to switch off the LED but then can work ok for a number of times.

If anybody could provide a little feedback it would be great thank you.


You are switching the pin between input and output this normally is not a good idea.
You need to do two things, read the how to use this forum sticky and post the code correctly.
Then you need to post a schematic of your hardware wiring.

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