2023年8月10日 · hi, just built my first project with Arduino. Was hoping to optimize it in a few ways (reduce global variables, lesser string variables etc.) when i stumbled upon a few posts saying that delay() was for beginners and that millis() was more useful when multi-tasking... although using either is entirely dependent on the context of the application. I use delay() several times …

2013年6月21日 · The two push button presses have to happen within a two seconds delay. The code's syntax is correct according to the Arduino software but when I try the uploaded program on my Arduino Uno, the LED always stays off. I connected the push button between pin 12 and and 5V and used the built-in LED. Any help is appreciated!

2020年6月13日 · Hi everyone, I tried searching for this and couldn't find a solution that I could understand anyway. I need to program a Nano to be a simple on-delay timer. As a PLC programmer to me this seems very simple but for an Arduino it seems a little more tricky. I have a normally open float switch wired as an input. if that float switch is closed for 10 seconds I want …

2017年5月27日 · You should be able to delay up to just under 50 days (the number of milliseconds represented by a 32 bit number). Some Arduinos have a ceramic resonator and the timekeeping is not very accurate (minutes or more per day).

delay(1000) is a delay in ms. So for a 7 hour delay you need 7 hours * 60 minutes * 60 seconds * 1000 = 52,200,000. Adding UL is good, to show it's long and unsigned. Also it fits in an unsigned long which has a max value of 2^32-1 = 4,294,967,295.

2017年10月2日 · Part 1 It is not usually long before new Arduino users discover that although the delay() function is easy to use it has side effects, the main one of which is that its stops all activity on the Arduino until the delay is finished (not quite true, I know, but that is usually how the problem presents itself). When this occurs the new user is usually directed to the …

2008年7月9日 · Using Delay would introduce some slip, but I guess the micro really is running pretty fast, so 1ms in arduino time is really long. Also, how accurate is delay compared to wall-clock time. I'm using a maxim-ic clock to handle most of my time-keeping, but I'm wondering how much slip would be introduced by a 8min delay?

2023年4月29日 · Hello, I'm wondering if i'm doing this right. I'm trying to use the millis() function to delay another function precisely. I want to know if I'm declaring the variables right, if I'm fetching the potentiometer value right and if I really need floating points to do this. Here's my code: uint16_t delayTime = 1000; uint64_t time; void setup(){ } void loop() { while (millis() < time + …

2013年5月20日 · So I 'm using delay() for 5 sec. 3 min. 5 sec. delay and backward, wich is affect starting and counting time, obviously after reading the treat that is unsuitable. What could be the best way to do it?

2009年7月6日 · The PT2399 is a standalone delay chip with delay controlled by a 10k Potentiometer. You COULD use a 3 wire SPI interface to control a digital POT (Like MAXIM MAX5481) to adjust the delay using ARDUINO. Do I know anything about MAX5481... no, I just picked it at random as an example... This does seem possible though. Pete