I am trying to create a heart beat using a relay + light and I can't have a delay because I am using a ping sensor and motor to make the heart beat faster and sculpture vibrate as you get closer. This is for a sculpture I am doing and my professor and I have tried many ways but can't seem to get it …

If you specify what you need it would far more easy to help you. So attach a timing diagram or a state diagram. Also you should do this in the first place since it helps you structure your code

Another take on the same problem const byte ledPin = 13; unsigned long previousMillis = 0; const byte states[] = {HIGH, LOW}; long intervals[] = {200, 200, 200, 800}; byte state; void setup() { pinMode(ledPin, OUTPUT); } void loop() { unsigned long currentMillis = millis(); if (currentMill…

Nice. A bit more configurable than mine. :slight_smile:

Thanks. I had fun doing it. I was amazed by how much code I could take out by using the arrays, the modulo operator and sneaky stuff like incrementing the state as part of the digitalWrite() and doing the modulo as part of the array index, although that is starting to border on making the code unrea…

You could probably simplify it by calling millis() twice and not having a variable, it wouldn't make much difference. It's elegant, and I like it, but probably is the most benefit as a tutorial on how to achieve a lot in a few lines of code.

int beat = 13; void setup() { pinMode(beat, OUTPUT); } void loop() { unsigned long x = (millis() / 80) % 12; digitalWrite(beat, 1 * ((x == 0) || (x == 3) ? 1 : 0)); }

What is the difference between what this digitalWrite(beat, 1 * ((x == 0) || (x == 3) ? 1 : 0)); does and what that digitalWrite(beat, ((x == 0) || (x == 3)) ); does? Maybe by the time the compiler gets done there is none?

Yours has no "plaque". Edit: ... except for the extra space after the 2 closing parenthesis.

I value easy on the eyes matching up of braces, parenthesis and structure more highly than packing lines. That extra keystroke now and then saves me time searching for matches and ends. Perhaps this happens more and more past about age 35, as the eyes start to go.

digitalWrite(beat, 1 * ((x == 0) || (x == 3) ? 1 : 0)); If we are going to have that extra stuff at all I would prefer: digitalWrite(beat, 1 * ((x == 0) || (x == 3) ? HIGH : LOW));

Trying to create an asymmetrical blink without delay PLEASE HELP!

Projects Programming

dlloyd March 4, 2015, 3:51am 30

Thanks Nick, code updated...I always seem to leave some extra stuff in there!

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Trying to create an asymmetrical blink without delay PLEASE HELP!

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