There is a level shifter in the playground that works very well from the NXP APP note AN10441 I've used it with 2N7000 Mosfets from 3V3 to 5 it works bi-directionally.

The first question to be answered is what does the role pin do... If you had taken the time to read ALL the documentation you'd know...
From the pingpair sketch...
// sets the role of this unit in hardware.  Connect to GND to be the 'pong' receiver
// Leave open to be the 'ping' transmitter
const int role_pin = 7;

@ pYro65 thank You this is something I've waited for... and sweated over trying to do it the hard way, un-necessarily so. Thank You Again, I'll have it installed as soon as I can get to the machine. Tell me, Do you have a Pepsi account too??. When you do I will be there to take care of my obligation.

Doc

No in a series circuit the total current is the voltage divided by the resistance or V/I. The 3 Primary "Laws" or relationships are, R = E/I, I = E/R and E = I * R. There is a similar one for power..
Mr Google knows, all you have to do is ask. It's free too.

[asking questions about the answers found in the search, Not asking others to search for you... or write code for you]

Mr Google is your friend.. Answers come here much faster to those that took the time to begin searching, and asking questions about the answers found in the search, Not asking others to search for you... or write code for you What you want is available as a sketch (sketches, I think), I've seen it... There or somewhere.
There are More Arduino groups, webpages and Sig's (Special interest groups) then you have the time to count... Cataloging them all would be a large piece of work.
Mr Google also searches the Forum too. Which might save you another search.
Have you taken the time to search the Playground... They'res a lot of IR stuff there... Too.

Doc

Thank You Sir.. I asked because there are others like myself that don't always use an Arduino Uno for code and any little advantage helps. Although there isn't a lot of spare room in many of the smaller chips...  Once the code is debugged and works in a bigger one porting most code can be easily done.

Doc

@ Tim, I use Enried's Modded Ver 1.04 IDE with Coding Badly's tiny cores. It works well for me and I'm really interested in the debugging thing. Will your application support all of that and where do I sign up for the debugger?.

Doc

I can program any chip from either method... as I've said Unfortunately, I can't help you much more. I use an AMD FX 6100 6 core processor running at 3.3 GHz with Win7 Ultimate. I've read comments from various people about this issue and unless there is a wiring issue?. I made several several myself before I put power to it.. Even after all the years I've still not learned that I'm not infallible. I may know the words but I've not yet comprehended them yet. So I make mistakes, I check my work and look that all is as intended, twice... Before I ever apply power I use my fluke to verify LED polarity, It's just what works for me.

Doc

I've used ArduinoISP to burn bootloaders and program both with RS232 or ISP and the modded 1.04 release... 328's and 85's are all I've programmed so far but the setup works flawlessly With no issues. as a matter of fact ver 1.01 won't work to do the same task. I made the adafruit shield but I modified it so that I could plug the 6 pin ISP cable into any ISP connector and program the chip from my shield... Necessary because I modified the shield to program 2313's and 85's.. and the 6 pin ISP connector.

Doc

Epoxy works best in my experience, I used to have 1 in 10 separate from the panel until I began roughing up the plastic and fixing a small washer (I like outside star lock washers) and a grey epoxy resin used for automotive repairs called JB Weld. The curing time can be accelerated by heating to 45 deg C or 115 F for 30 minutes.
This was a technique that I used to make field testable models that let me finalize circuit board sizes, mounting holes and cutouts required for a final drawing, PCB layouts (mounting holes) and battery holders for SLA batteries in both plastic and aluminum.

Doc

There is no port d on an 85... according to tiny core_pins.h port b though, 6 pins and b5 is reset. So you 'might' have issues with addressing port d in your code....  
Ya Think?

You could also put a 470 uF cap from Vcc to ground on the SD card... Do you have a separate 3V3 supply for the SD card, Most I've seen work @ 3V3 not 5V and If this is the case the 3V3 supply is limited in current capacity. The filter cap should help keep the supply "stiff".

Doc

You could also have rotated the transistor 120 Deg. anticlockwise...

Just rotate the character set 90 Deg... and turn it (the display) on end...

There are sometimes low voltage zeners used there, Most low voltage zeners aren't very accurate and tend to be high in zener (avalanche) voltage. The USB signal as I remember is about 800 mV differential signalling so 27 could well mean 2.7V zener diodes too...