Anyone planing to upgrade this sheild?

Store Forums Video Experimenter General Discussion Anyone planing to upgrade this sheild?

This topic contains 7 replies, has 5 voices, and was last updated by  mrbig 3 weeks, 5 days ago.

Viewing 8 posts - 1 through 8 (of 8 total)
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  • #622

    burraak
    Member

    Its been almost 2 years I think the great video experimenter shield need an upgrade with improved on board image processing ,color overly and color output etc in other words full feature frame grabber/processor for arduino 🙂

    #1695

    Michael
    Keymaster

    And how would you propose accomplishing all of that on an ATmega328 microcontroller? The reason it can’t do more than it does is because there is only 2K of memory in the Arduino, and you can’t generate the composite video color burst with a 16MHz clock speed. There’s only so much you can do with an Arduino.

    #1740

    burraak
    Member

    Sorry for the late reply actually I was looking for an answer coz I’m no electronics expert but curious to see video experimenter shield expanding its capabilities

    Just wanted to know isn’t it possible to borrow some SOC like recently released ARDUINO YUN shield did, to do some serious stuff??

    Like these chips
    http://www.conexant.com/Product/video/vd/CX25824/Pages/default.aspx
    http://www.ti.com/lit/ds/slas183/slas183.pdf

    Can we merge them into video experimenter shield??? ???

    #2065

    Raza159
    Member

    I think you could use an external pot connected to A2. If you make a voltage divider using another resistor, then the resistance of the pot will determine a smaller voltage range.

    For example: connect the 5V source to 30K or 40K of resistance, then to the left lead of the pot. The middle lead of the pot goes to A2. The rightmost lead of the pot goes to GND. This way, the full range of the pot will provide 0V – 1V to A2 and this will allow finer adjustment.

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    #2066

    Michael
    Keymaster

    Yes, that is a great idea and in fact I have designed a V2 of the board which is being made right now. It has a 20K resistor to create a divider on A2, so the pot range is expanded.

    #2351

    Michael
    Keymaster

    With the V2 board, the threshhold pot has a wider range so it is easier to adjust. It’s a minor improvement.

    #2354

    esraa
    Member

    good design and amazing Technic

    #11401

    mrbig
    Participant

    Hi, great project!

    Did you consider using an ESP32? It’s pretty cheap, and has all the juice that would be needed for handling grayscale framebuffer.

    There are also boards like the TTgo 32 that shares the arduino footprint.

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