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Easy Program Needed - Will Pay $ — Parallax Forums

Easy Program Needed - Will Pay $

spinefan03spinefan03 Posts: 10
edited 2010-08-18 00:24 in Propeller 1
I have a little programming needed and at the moment do not have the time or knowledge to do (aka, figure it out) on my own.

I have led drivers that have pwm modulation built in so I need a simple program that reads a potentiometer and outputs pwm for multiple channels.

This is all the information I have for the pwm requirements

"
PWM terminal has an input voltage of -0.3V~6V. When set to logic high the device active fully operational. If set to low or left floating the device will turn off current output
"

"
The minimum time of PWM-based adjustment is less than 20uS and the maximum dimming ratio is up to 500:1. If high ratio is needed, recommended dimming frequency is below 55Hz. If not, 2Hz is available
"

I would like the smoothest dimming possibility with the max amount of channels that the prop can handle easily
(assuming two pins are needed per input-output pair, 15 channels)

Let me know if you are interested and what you would expect for compensation of this project. There will also be other programming needed later if capable.

Thanks, Ryan.

Comments

  • Luis DigitalLuis Digital Posts: 371
    edited 2010-08-17 08:11
    Hello,

    Ryan's proposal sounds interesting. Someone has contacted you?

    A forum for these requests could be interesting. The consultants page is fine, but seems not to have much visibility, but a few months ago I was hired to work 30 days. :)
  • spinefan03spinefan03 Posts: 10
    edited 2010-08-17 10:17
    no, no contact yet.

    If there was already a forum made for this type of inquiry, I must have overlooked it and apologize for that.
  • RS_JimRS_Jim Posts: 1,768
    edited 2010-08-17 10:36
    I noted a post from Microcontroled that he was looking for work. Why don't you send a PM to him about your project. It looks like it might be right up his alley.
    RS-JIM
  • Luis DigitalLuis Digital Posts: 371
    edited 2010-08-17 12:17
    spinefan03 wrote: »
    no, no contact yet.

    If there was already a forum made for this type of inquiry, I must have overlooked it and apologize for that.

    Personally I see no problem in asking for help here. It is common to ask for help and offer payment, said there should be a special forum, like a newspaper classified.

    I also commented that there is a page of consultants, but apparently people do not visit, or think we charge too expensive. :)

    http://www.parallax.com/Support/Consultants/tabid/382/Default.aspx

    As noted, Microcontroled is in search of work.
    http://forums.parallax.com/showthread.php?t=124911

    I am also available, but I do not speak English.
  • spinefan03spinefan03 Posts: 10
    edited 2010-08-17 12:29
    Luis Digital wrote: »
    I am also available, but I do not speak English.

    I have never claimed to speak English either.
  • mparkmpark Posts: 1,305
    edited 2010-08-17 13:34
    I don't understand. You want the Propeller to output a PWM signal to a device that has PWM modulation built in? What does that even mean? (I guess I'm disqualifying myself from the job here.)
  • bdickensbdickens Posts: 110
    edited 2010-08-17 13:59
    Wow. Someone read my mind. I was wondering how to engage someone to take a project that I have been tinkering with, and harden in for general use.

    I didn't even know the page existed. Thanks for surfacing that
  • LeonLeon Posts: 7,620
    edited 2010-08-17 14:06
    I don't understand why the OP wants PWM outputs from the Propeller, when the drivers already have it, either. He probably means that he wants to control the PWM with the Propeller, which doesn't need the Propeller to generate PWM. Details of the driver chips would be helpful.
  • Luis DigitalLuis Digital Posts: 371
    edited 2010-08-17 15:58
    Leon wrote: »
    I don't understand why the OP wants PWM outputs from the Propeller, when the drivers already have it, either. He probably means that he wants to control the PWM with the Propeller, which doesn't need the Propeller to generate PWM. Details of the driver chips would be helpful.

    Leon, I use this chip TB62752, has PWM, but needs a PWM signal to control brightness.

    I think he has something similar.
  • Luis DigitalLuis Digital Posts: 371
    edited 2010-08-17 16:08
    spinefan03 wrote: »
    I have never claimed to speak English either.

    His words made me laugh. :)

    I am going to contact if there is no problem.
  • spinefan03spinefan03 Posts: 10
    edited 2010-08-17 17:36
    Unfortunately, I don't really know what I'm talking about (why I've decided someone else should do this)

    I have an led array and the drivers for them. The driver has 4 pwm inputs to control the 4 Leds in each array. I could build a small circuit using 555 timer to control the signal for me by using a potentiometer. I am not actually using the power from the chip as power for the LEDs. The 555 circuit causes 2 problems.

    1. Each "channel" will require a seperate circuit so 30 timer circuits verses 2 propeller chips.

    2. The 555 circuit will always be analogue only and does not have the ability to program "scenes" in a later application
  • LeonLeon Posts: 7,620
    edited 2010-08-17 23:31
    What are the drivers?

    This is like pulling teeth!
  • spinefan03spinefan03 Posts: 10
    edited 2010-08-18 00:24
    http://www.sure-electronics.net/download/CD-001-015_Ver1.2_EN.pdf

    this is the only information I have. All relevant info I was able to find in this document I posted previously. The manufacturer has been of little help as the consultant has never met the guy downstairs putting the pieces together. You get the support for the product you pay for, but when it still costs you $1000 for parts, you get the most bang for the buck available.
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