Looking for Example code for the Relay Board Shield

-

anyone have example code use relay board shield? perhaps code switch each of 4 relays on 1 @ time 5 seconds , off again.

thanks.

there many "relay board shields".
link 1 have.

did go through examples come ide.
activating relay (writing pin high or low) basic task, switching led on/off.
covered in several examples.

you can first use delay() turn relays on/off 5 seconds apart.
but if program has else (delay blocks), use millis() timing.
the "blinkwithoutdelay" example shows how.
leo..


Arduino Forum > Using Arduino > General Electronics > Looking for Example code for the Relay Board Shield


arduino

Comments

Post a Comment

Popular posts from this blog

Error compiling for board Arduino/Genuino Uno.

-
hi new arduino , trying write code of temperature controlled fridge can adjust pot , temp in fridge changes lowest setting -15 , highest setting 30degrees. the temp drops below input pot im trying make compressor turn on , light show compressor on. new @ , im still not quite sure im doing. error below keeps popping , im not quite sure whats wrong code. im hoping on close path how should have done it, how fix error appreciated. arduino: 1.8.4 (windows 10), board: "arduino/genuino uno" c:\users\admin\appdata\local\temp\ccfcxdpc.ltrans0.ltrans.o:(.rodata+0x6): undefined reference `print::write(unsigned char const*, unsigned int)' c:/program files (x86)/arduino/hardware/tools/avr/bin/../lib/gcc/avr/4.9.2/../../../../avr/lib/avr5/crtatmega328p.o:(.init9+0x0): undefined reference `main' collect2.exe: error: ld returned 1 exit status exit status 1 error compiling board arduino/genuino uno. this report have more information with "show verbose output during comp...
Read more

Installation database is corrupt

-
dear all,   last month installed trial version of cs3 on pc , when decided install extended version of cs3, it  didn't install.  learned adobe use wincs3clean script, downloaded , ran on computer, using level 1. after tried installing extended version of cs3 got message "installation database corrupt" , can't install cs3.  can me , let me know how solve problem? use windows, xp 2. appreciate help. charleshhh install what... disc or download   if download... rename original , download again... downloads corrupted More discussions in Photoshop Windows (read only) adobe
Read more

RFID-RC522 with Arduino Pro Micro project. Error on the code?

-
Image
hi all, first of newbie... i trying make below project, keep having type of errors. let start project page: unlock pc/mac rfid my hardware: arduino micro rfid-rc522 code: code: [select] //get library https://github.com/ljos/mfrc522 //sketch: gudjonholm@gmail.com /* pins    spi        uno    mega2560  leonardo 1 (nss) sda (ss)   10     53        10 2       sck        13     52        sck1 3       mosi       11     51        mosi1 4       miso       12     50        miso1 5       irq        *      *         * 6       gnd        gnd     gnd       gnd 7       rst     ...
Read more