I have purchased an ID-12 RFID reader as well as a MAX-7456 breakout board from the Toronto sparkfun distributor (Creatron) and have finally gotten around to starting a project with them. This is a quick hack I threw together to test the RFID and OSD modules together. Here is a quick video demo:
I will be adding a client app on a PC that will check the RFID tags against a database as well as a website I’m creating using the ASP.NET MVC Framework that will allow users to log on and administer the tag database so they can add/remove/activate/deactivate tags remotely. I will not be releasing source for this part of the project since it is a quick hack, but I do plan on releasing the Arduino libraries that I’m writing for the MAX-7456 (nearly completed) as well as the ID-12. The MAX-7456 library currently supports an init() function that sets the parameters for NTSC video (I may release a PAL version if there is any demand) and a display function that displays a string on the screen. I plan to add a .clearscreen() function to make clearing the screen between displays easier and a .gotoxy(x, y) function so that the string does not need to be padded with spaces or CR/LFs in order to place it farther down the screen. I will post more videos when the project is completed and working, as well as the libraries once they are finished.
Cheers!
Hey,
I have one of the video overlay units and an arduino. My main interest is to retrieve the ‘video signal present’ from the max 7456 and then when a valid signal is present use this information and also overlay text on it. I will be using it for an amateur television repeater on a hilltop in Ireland that received video in on one radio frequency and if a valid signal is present switches off the testcard and transmits the signal on a different frequency with an id text overlaid on the output. I need to use the PAL mode on the device.
I have read the datasheet and it should be possible to do what I want. If you have any relevant code or libraries then let me know! Thanks in advance.
Here is the thread I used to get started.
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1220054359/0
The code in the top post worked right off the bat using cut ‘n paste and supports buth PAL and NTSC, just read the comments and adjust accordingly. I still haven’t gotten around to putting the finishing touches on the library I was making for it, but I’ll try to make it a priority over the next day or two.
HI Paul I like what you have done, I am just showing my interest in a library that supports PAL as well. Keep up the good work.