Hello Everyone!
Long time viewer of Daves youtube channel. I recently joined the forums and have been lurking and replying to what I feel qualified to answer.
Anyways, I am working on building a reflow oven from a toaster oven. It will use an arduino Mega as the main processing power. I have a "shield" designed and a pcb routed, however I am a novice at circuit design and layout. All I know I have learned mainly from experimenting and watching youtube videos. I would really appreciate it if the fellow forum members that have more experience than myself could take a look and call out all my design flaws. I am going to upload my .brd and .sch files in a .rar archieve. All these programs are freeware so everyone has the opportunity to take a look if they would like to.
A little more about the shield:
Uses 3 K type thermocouples to sense different areas of board.
Uses 3 max31855 cold junction compensation IC's
Uses 1 max3002 for level shifting from 5v to 3v3
Has outputs for 2 Solid state relays, for independent top and bottom element control
Has 2 RBG led's for Status and quick temp check (red if above setpoint, green if within setpoint margin, blue if below setpoint)
Uses a 16 key, 4x4 matrix for input
Uses 2x16 LCD for UI
Things I would like to add in later revisions:
SD card data logging
Additional display capabilities
MatLab data generation (Very far off
![Confused :-//](https://www.eevblog.com/forum/Smileys/default/confused0024.gif)
)
Thank you in advance for any help!
--Crab
Can't attach .rar so here is a link on google docs::
https://drive.google.com/file/d/0Bz8gx9yr3X1qR29WWmx5cnROVTQ/edit?usp=sharing