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Ardupilot as OSD WITHOUT additional hardware (NO LM1881)

Posted by Francesco Ferrara on March 15, 2010 at 2:30am

BaroneOSD is a PAL video overlay impression WITHOUT additional hardware required (NO LM1881 Sync generator).

Use only 3 pin:

D1 (USART TX) used to pump pixel in the video connected with a 330Ohm resistor to D6

D6 (AIN0) Video in/out, connect here you camera or radio TX.

D7 (AIN1) 0.3V Voltage reference (you can use a partitor resistor)


http://www.elenafrancesco.org/arduino/



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Comments

  • YureZzZ April 22, 2011 at 3:10am
    Neat stuff! What is the compiled code size and memory constraints?
  • Russell B. Sutton April 14, 2011 at 10:41pm

    Can u post a wiring diagram of how you connect it inline to a camera and Tx

  • Francesco Ferrara March 18, 2010 at 3:03am
    I'm near a new version, that use SPI port not USART, pin needed D11 MOSI, D6 D7 to use analog comparator (with only 2 resistor!!!).
    D11 (PB3) is not used.
    D6 (PD6) is "remove before flight"
    D7 (PD7) is GPS power switch
    How it is possible to use D6 D7?

    P.S. I have found a small error in the Hardware Diagram
  • Rana March 16, 2010 at 10:23am
    It is not a big deal, you can cut the tracks of two pin and with small wires solder them on required pins on the microcontroller or. You can modify modyfy the pcb of Openlog, it is freely available for download.
    I have pasted the files here also;
    OpenLog.brdOpenLog.sch
  • Francesco Ferrara March 16, 2010 at 8:16am
    To use the analog comparator, PD6 PD7 (AIN0 AIN1) are needed, but are not avaiable on this implementation sorry.
  • Rana March 16, 2010 at 6:48am
    Yes, F. Ferrera, thats right !
    http://www.sparkfun.com/commerce/product_info.php?products_id=9530

  • Tim McMahan March 16, 2010 at 5:32am
    Here is a standalone unit based on AVR, perhaps some of the info there would helpful in this? Its based on NTSC. The same guy has a HAM radio telemetry system as well.



    Tim
    The Videoverlay on garydion.com
    A page about amateur radio projects and others built using the Atmel atmega8 microprocessor.
  • Francesco Ferrara March 16, 2010 at 5:27am
    http://www.sparkfun.com/commerce/product_info.php?products_id=9530
  • Francesco Ferrara March 16, 2010 at 5:27am
    Did you mean this ?
  • Rana March 16, 2010 at 4:34am
    Here is the lates HEX file, firmware modified by me to support bauds 2400, 4800, 9600, 19200, 28800, 38400, 57600, 76800 & 115200. OpenLog.hex
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