Problem connecting AVR + ULN2003 With Relay using CAN BUS ,, Need Help!!

[Giri12]

Hello everyone,

I have tried to communicate 2 microcontroller using CAN-BUS ,

It's worked . Now , I'm trying to turn light bulb using those 2 micro ( 1 micro as input , and the other as output )

I choose ULN2003 to drive 2 relay. but I got stuck!! The problems begin when I put the relay + ULN2003 in my shield.

I separated into 3 device :
1. Micro + CAN bus (I called "MCAN1" as Input)
2. Micro + CAN bus (I called "MCAN2" as output)
3. ULN + Relay Shield

When I sent some command to turn on light bulb , MCAN2 didn't respon. So , I remove the shield ,

and those 2 Micro can communicate again. May be someone have experience like this ? I need Help , it make me confusing with this ULN,,

Sorry for my bad english,,

Thanks,

Gee

 

[Giri12]

Sorry ,, this's my schematics

View attachment MCAN1.pngView attachment mcan2.png