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Thread: LCD Backlight Upgrade

  1. #221
    MySQL Error jcdillin's Avatar
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    Quote Originally Posted by Scouse Monkey
    which reminds me. Need to get my tubes stuff sent over and I need to send you some cash.

    Get me your address geezer and i'll send em over! i'm going to send you 2 sets since i'm getting more
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  2. #222
    MySQL Error jcdillin's Avatar
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    Quote Originally Posted by Scouse Monkey
    5. The manual adjustment might be done with 3 buttons. ie one for up, one for down and one to toggle auto on or off. This might be tricky as it will need either a batteyr backup or some kind of non-volatile memory (i have never built anything like that)

    that will be easy as the PIC microcontroller has a small area of memory that can store simple things. such as the previous on/off state and brightness level, and it's NVRAM so it will store it even without power. And even still if that wont work it's very very easy to add a small eeprom that will hold it all without power.
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  3. #223
    MySQL Error jcdillin's Avatar
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    faq updated!
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  4. #224
    Constant Bitrate donde's Avatar
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    Will you be offering the auto dimming circuit seperate from the entire kit? I would be very interested in purchasing one or two of these and I know several other people that would be too.

    The screen will be dimmed by controlling the amount of voltage to the backlight, correct?

    I know you've already heard this a million times, but great job on the project. It's quite an undertaking and you're really moving quickly on it!

  5. #225
    MySQL Error jcdillin's Avatar
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    Yes the auto dimming will be a add-on. So you wont need to purchase it if you want to do something yourself.

    Correct.

    Thank you, even if people do say it a million times, makes it all worth while
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  6. #226
    MySQL Error Scouse Monkey's Avatar
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    Quote Originally Posted by donde
    Will you be offering the auto dimming circuit seperate from the entire kit? I would be very interested in purchasing one or two of these and I know several other people that would be too.

    The screen will be dimmed by controlling the amount of voltage to the backlight, correct?

    I know you've already heard this a million times, but great job on the project. It's quite an undertaking and you're really moving quickly on it!
    The dimming is done via pwm circuit. You cannot simple reduce the voltage into the inverter as at low voltages the tube will not light properly.

    I think it would be easier for us to just put the plans on the website and let people make thier own circuit.

  7. #227
    MySQL Error jcdillin's Avatar
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    We could do that

    either way the inverter is going to be controlled via PWM or voltage level, so we really could do almost anything.


    edit: woot! 2500
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  8. #228
    Maximum Bitrate ddogg_777's Avatar
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    Quote Originally Posted by jcdillin
    Thank you, even if people do say it a million times, makes it all worth while
    I will be buying one because I think it would benefit me here in AZ. Well done guys! It will be as bright as the Allbrite panels that I sold.

  9. #229
    Constant Bitrate
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    just checked out your project site JCD. Looks very promising. What would be a good, reasonable donation amount?

  10. #230
    MySQL Error jcdillin's Avatar
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    oh at least two to three hundred


    no idea, I appreciate any amount
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