0

help with code or wiring

Eran Apelbaum

January 21, 2018 16:15

None

Follow

Hello all

I made this  circuit  to check all the pins in my arduino boards because my students burn them out (or so they say)

I have two questions

when i press simulation the led connected to pin 13 doesn't light up. all the leds in pin 2 and above light up dimly. why is that and are the two phenomena connected?

thanks 

Eran

 

• Facebook
• Twitter
• LinkedIn

4 comments

• 0
  
  Eran Apelbaum January 21, 2018 16:16

  forgot to add the link

  https://www.tinkercad.com/things/0hlUCQRFyOd-ready-for-code-arduino-test-pins/editel

   

• 0
  
  Carol Timmer February 13, 2018 20:27

  Hi Eran,

  I looked at your circuit and code and I thought that the problems with your LEDs are the result of using pin 0 and 1 (RX and TX).
  Once you remove the wiring to these 2 pins the other LEDs works fine.
  According to tyhe forum at Arduino the RX/TX pins can be used as digital, but there's a but......

  <QUOTE>"The but is that there are resistors associated with these pins, to facilitate their use as serial pins, and these resistors can cause issues with some uses as input and output pins, depending on what the input or output is from or driving.<END QUOTE>

  http://forum.arduino.cc/index.php?topic=190866.0 

  
  I've took the liberty of altering your code, maybe it's to your liking.

   

  Carol

  https://www.tinkercad.com/things/2J6Vc9pUHIt-copy-of-ready-for-code-arduino-test-pins/editel?tenant=circuits 

• 0
  
  Eran Apelbaum February 15, 2018 19:24

  Hi Carol

  Thanks for your comment. I will certanly look into the 0 and 1 pins. 

  I couldn't open the link you sent me though. Is it public? or could you tlell me how you changed the code?

  Thanks 

  Eran

• 0
  
  Carol Timmer February 16, 2018 19:24

  Hi Eran,

  I forgot to make it public, but now it is.....;-)

  https://www.tinkercad.com/things/2J6Vc9pUHIt

  this should work.Let me know if it doesn't.

   

  Happy tinkering, Carol