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Thread: Is there a logical explaination?

  1. #1
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    Default Is there a logical explaination?

    I've just built another Grinch and was testing it with the LED strings I'd made - it's just a modified tester really. Anyhoo, it works fine so don't worry it's not a troubleshooting thread ;).

    So the lights looked great hooked up to just the Grinch. I then hooked up the Ren-C to give it a burl, and the LEDs barely came on. So my question - is driving LEDs directly (that is without an SSR) only something you can do directly from the Grinch and not with the Grinch/Ren-C combo?
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    Ugh, this year will be too busy. I'd like to buy a vowel and more time please.

  2. #2
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    Default Re: Is there a logical explaination?

    Someone else will chime in, but I bet the Ren C is running pure renard code. Not PWM.

    Meaning a small pulse is sent only at the event and the triac is expected to latch for the remainder of the cycle.

    Joel
    Lets get serious, I have over 10,000 channels on my back, just where do you want to start counting.

  3. #3
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    Default Re: Is there a logical explaination?

    Ahhh, thanks for that. I didn't program the pic, it came to me that way. Righto - so that's something I'll try . . . when I get a pic programmer.
    Ugh, this year will be too busy. I'd like to buy a vowel and more time please.

  4. #4
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    Default Re: Is there a logical explaination?

    the ren-c ONLY does pwm, there is no other option.

    as for why the tester looks funny im not sure.

    is it different to any of you other grinches? are you sure the led is 100% on?

    off the top of my head i have no idea

    Peter

  5. #5
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    Default Re: Is there a logical explaination?

    Everything is all in pieces on the lounge floor at the moment or sitting on the anti-static mat in the office, so when I put it together in the case I'll try a different one. I'll also try the 2nd Ren-C I've got with the pic I got from you in Melb Pete, um *cough* when I find it . . . I put it in a very safe place when I got home.

    As for the test at 100% - it is at 100%. I even ran a sequence, the light kinda flickers and doesn't really dim and that dull light is as bright as it gets. And it's not just these LEDs, it's all of them. I'm sure it worked alright before . . .

    Basically I wanted to established that it should work. Right maybe it is a troubleshooting thread after all . . . . Once I get my case together tonight I'll test it all proper like. Thanks for the help guys.
    Ugh, this year will be too busy. I'd like to buy a vowel and more time please.

  6. #6
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    Default Re: Is there a logical explaination?

    Quote Originally Posted by scorpia View Post
    the ren-c ONLY does pwm, there is no other option.

    as for why the tester looks funny im not sure.

    is it different to any of you other grinches? are you sure the led is 100% on?

    off the top of my head i have no idea

    Peter
    Peter isn't there an option. If you do not feed back from the C to Grinch, then there is no PWM. It takes both and output and input Cat 5 for PWM. Please correctly if I'm wrong. I don't know if Toodle is using the PWM feedback.
    2 Grinchs, 2 Ren C's and a Ren T for 128 channels (in 2008)
    2 Ren64, 2 Ren24, 2 Ren24ss, 4 Ren16ss and 8 Ren8ss for 352 channels (currently)

  7. #7
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    Default Re: Is there a logical explaination?

    Dnesci, you're right. Without feedback from the Grinch there isn't any PWM, just an output pulse.
    Phil

  8. #8
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    Default Re: Is there a logical explaination?

    Well,

    you learn something every day.

    so i should have said there is no option in the firmware.

    i will have to test my grinches without the feedback cable to see what happens.

    Peter

  9. #9
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    Default Re: Is there a logical explaination?

    So . . . . if I'm reading this correctly it indicates that one of the itty-bitty cables between my Ren-c & Grinch is "faulty"? The one to Grinch in?
    Ugh, this year will be too busy. I'd like to buy a vowel and more time please.

  10. #10
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    Default Re: Is there a logical explaination?

    Quote Originally Posted by toodle_pipsky View Post
    So . . . . if I'm reading this correctly it indicates that one of the itty-bitty cables between my Ren-c & Grinch is "faulty"? The one to Grinch in?

    If that is the problem then it will be the cable from Grinch "Out" to Ren-C "From 595 Out".
    RavingLunatic
    Not just a username but a state of mind

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