The unit does not come with any instruction but can be found on their web site. Had a problem from my own doing, returned unit and was fixed fast and free. Don't see that service any more... Will definitely buy from again. Thank you for the support.
Ordered from tinde on-line and all arrived in a couple of days. Purchased LED units 2 in green and 2 in yellow. Both types operated with no issues. Noted that when these are placed next to the green identical units that the yellow is much brighter. Can adjust with the intensity command as desired. Using an Ardunio Mega via a serial link. No documentation is supplied (one star) - not an issue.
Pretty disappointed to find out I only purchased the actual board here. I do see now with the benefit of hindsight that it says PCB only, but the main photo was a display of exactly what I was looking for, which included the seven segment displays themselves, so perhaps I got overly excited. The board itself I'm sure is fine, but the way it was sold to me was confusing. Sigh.
Response from Embedded Lab | Jan. 26, 2015
Hi Sean, I am sorry to hear that you were disappointed with your purchase. If you want I can still refund you for that. And regarding the confusing part, it is clearly mentioned in the title (PCB only), in the first paragraph ("This listing is for the PCB of the"), in Features section with bold letters ("Note that you will receive PCB only. You will need following items for completing the board"), and also provides you options for the assembled boards at the end of the description. So it would not have happened if you have read carefully what you are buying. I have no intention to confuse the buyers. The picture of the assembled board is there for reference to let the buyers know how the assembled product would look like. But I have taken your suggestion and changed the main picture to one that shows only PCB to avoid this from happening again.
I am not sure why would you give low rating for Communication and Shipping. You never tried to contact me about the issue or anything. And I shipped your order on the same day (Jan 22, 2015) and it was delivered to you in only 3 business days (Jan 26, 2015) including the day you placed the order. What better would you expect for the standard ground shipping?