Recent Posts

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Project Guidance / Re: Color Sensing with TCS3200...
Last post by Johan_Ha - Today at 08:01 pm
Not the frequency! The frequency doesn't get negative, does it? Have a look at this:
Code: [Select]

bcolor = map(frequency, 25,70,255,0);

If frequency is below 25, bcolor goes over 255. If frequency goes over 70, bcolor becomes negative. Don't mind what frequency is. Check only bcolor and set it to 0 or 255 if it went over the boundaries.
LEDs and Multiplexing / Re: Arduino power problem
Last post by PaulRB - Today at 08:01 pm
Any newbies finding this thread: please ignore bisaneothub's conclusion about what was wrong and how it was fixed. Total rubbish.
Generale / Re: Millis o contatore attivaz...
Last post by samu92 - Today at 08:01 pm
in effetti non era proprio il massimo è il fatto del tempo non rimasto non funziona come dovrebbe.. Ora ho corretto un pò di cose e parrebbe funzionare ad esclusione del fatto che non riesco a passare allo stato 3 quando il tempo è 0.

What is the output voltage of the step up module when nothing is connected ?
Nothing connected output is 3.5v (same as battery voltage)

What is the output voltage of the step up module when the Nano is connected ?

With arduino uno connected output is 5.08v
With arduino nano connected output is 5.08v, then it drops for a fraction of a second below 4v and back to 5.08v rebooting the nano
LEDs and Multiplexing / how to random loop
Last post by bisanethohub - Today at 08:00 pm
hay again..

help please, want ask how to create random loop. i read in forum n google too but i cant find it (not read all maybe  :) ) n there just find about random blink leds not random loop led.. i beginner to arduino. i use nano board.i create project leds show and maybe  about 15 style. because i newbie so i just write any code i know (i don't know much about optimized code). i write much code for about 15 style (different blink leds) in void loop. style led 1, style led 2, style led 3, 4, 5, 6 --> 15 n every style run 4 loop. so my question how to randomly it self the loop style led 1 - style led 15.

Code: [Select]

void loop (){

  for (byte i = 0; i < 4; i++) {
style led 1 }

  for (byte i = 0; i < 4; i++) {
style led 2 }

  for (byte i = 0; i < 4; i++) {
style led 3 }

  for (byte i = 0; i < 4; i++) {
style led 4 }

"This site can't be reached
%22's server IP address could not be found."

When I go to the "insert image" the only window I see is the one for the URL. Nothing else.

I am on Windows7 64b.
Yup.  I caught that, but obviously not quick enough ;)  Try the link again, it should be working, now.
As long as amperage is below the rated, you'll be fine. It's a limit. You are allowed to be below it.
That was my 'mistake'; I used isMatch because it was not clear what was needed.

Once that was clear, I did change it in the next code.
Programming Questions / Comparing two values
Last post by berkov1c - Today at 07:55 pm
hello everyone. i have arduino mega, nextion display, and max6675 thermocouple. also i have a slider on my display to set a temperature value. my goal is to compare temperature read value and set value so i can open/close my relay in order to result of comparison. i have checked the usage of "if" command and i think im using it in the right way.

And my relay is working i have tried to make it work with only thermocouple in another sketch. i have assigned an integer constant value for setting temperature when i heat the sensor, relay was openning and when i cool the sensor it was closing.

So i have to do this process on a variable set value not a constant. ill change the set value on display and ,i'll control relay according to this set value.

im using
float temp

temp value is perfectly displayed on the screen

for the slider value

uint32_t number2 = 0

i cant compare temp and number2. Please help me. Thank you very much.

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