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Author Topic: MAX7456 OSD Shield  (Read 1960 times)
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Here's a beta release of a On Screen Display (OSD) shield I've been working on, it still needs a bit tiding up.

It uses a MAX7456 from Maxim for the video overlay function. The MAX7456 is connected to the Ardunio's SPI port (MOSI, MISO and SCK) and a double row of 0.1 headers can be used to choose which digital pin drives chip select (CS) for the MAX7456.

In addition to the MAX7456 OSD chip, there's also a DS1307 Real Time Clock (RTC) with battery backup for displaying time and date to video feed.

I designed it using DesignSpark PCB, pulling in the MAX7456 footprint from the Sparkfun PCB library. I'll post design files and gerbers shortly.

For software, I used code from forum members dfraser and zitron in this forum post.


* osd - Arkwork.pdf (33.71 KB - downloaded 25 times.)
* osd - Schematic.pdf (87.03 KB - downloaded 19 times.)

* osd_top.jpg (289.38 KB, 1175x865 - viewed 68 times.)
« Last Edit: November 22, 2011, 10:07:32 am by TonyD » Logged

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Quote
For software, I used code from forum members dfraser and zitron

That library has been updated a few times, including a recent update that allows you to use the 7456 out of the box - no character set re-flash required.

-j

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Thanks J, I'll checkout the update software
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