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USB Controllers

Discussion in 'Electronic Basics' started by trickyrick, Oct 27, 2007.

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  1. trickyrick

    trickyrick Guest

    Can some one give me a little info about usb controllers I have being
    looking on the net and Im not sure what I should be looking for
    I want to control about 8 relays through my USB port and would also
    need some kind of software program that comes with it.
    Has anyone purchase anything like that lately
  2. John Larkin

    John Larkin Guest

    Just google <usb relay controller> for a bazillion hits.

  3. Are you talking about having a stand-alone controller that communicates to the PC via USB (i.e., your actual control software is on the end of the USB line), or just an I/O device that communicates over USB, (i.e., your control software resides on the PC)?

    If the latter, such as National Instruments USB6501, then look at page 6-12 of the follow PDF for the type of information you should be looking for:

    -> over voltage protection
    -> Max current/power
    -> pull-up resistor availability
    -> signal level (TTL?)
    -> thru-put (how fast can you switch the attached relays
    -> isolation (depending upon what load your relays are attached to,
    it's likily that you'll need an external power supply and thus
    will want some isolation from the PC.

    I've used NI's USB6501 to switch transitors connected to two lamps that pulled 110mA each. I was using the USB to power the lamps and couldn't do much more with the 0.5amp USB current limit. (LEDs were not bright enough).
  4. Don McKenzie

    Don McKenzie Guest

    May be something you like at:
    has a module that hooks up to an 8 relay module for a ready built solution.


    Don McKenzie

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    Serial OLED uses standard micro-SD memory cards.
  5. trickyrick

    trickyrick Guest

    Thanks Guys for the input
    I like the Elexol EtherIO24 Module and the Elexol I/O24 Accessories
    Relay Output Board
    and there are other's but my problem would be operation these. There
    are sites that talk about visual baisc and other programs.
    I was looking for a complete package with software.
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