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Power from USB ? — Parallax Forums

Power from USB ?

Do any of the carrier boards accept power from the USB ?
As well as communicate with the P.C...... ?

Comments

  • Cluso99Cluso99 Posts: 17,942

    FWIW I power my boards from USB (a Dell desktop, but I have used laptops occasionally) and the same when I use the P2-eval.

  • PublisonPublison Posts: 12,044

    I do not think any of the BS2 boards can be powered by USB.

  • FWIW I power my boards from USB

    One connection to P.C. only ?
    I.E......Power and communication on the single USB cable ?

  • I do not think any of the BS2 boards can be powered by USB.

    The exception to that is the BASIC Stamp 2pe Motherboard:

    https://www.parallax.com/product/basic-stamp-2pe-motherboard/

    -Phil

  • PublisonPublison Posts: 12,044

    @"Phil Pilgrim (PhiPi)" said:

    I do not think any of the BS2 boards can be powered by USB.

    The exception to that is the BASIC Stamp 2pe Motherboard:

    https://www.parallax.com/product/basic-stamp-2pe-motherboard/

    -Phil

    Sorry Phil, I missed that one. And I own one!

  • Cluso99Cluso99 Posts: 17,942

    @hitsware2 said:

    FWIW I power my boards from USB

    One connection to P.C. only ?
    I.E......Power and communication on the single USB cable ?

    Yes, single USB/power to P1 and P2 boards. Don’t know anything about Basic Stamp boards. I often use the USB to serial CP2102 dongles which supply 5V on the header from the USB connection.

  • Thank You(s) ....
    What I need is something like this .......
    https://www.parallax.com/product/propeller-project-board-usb/
    With a Stamp ...

  • @hitsware2 said:
    Thank You(s) ....
    What I need is something like this .......
    https://www.parallax.com/product/propeller-project-board-usb/
    With a Stamp ...

    Take a look at the OEM Stamp components. The schematic for the Stamp is documented. And it would be an interesting exercise.

  • @"Buck Rogers" said:

    Take a look at the OEM Stamp components. The schematic for the Stamp is documented. And it would be an interesting exercise.

    I don't see anything there. Maybe could simply jump from the USB connector ,
    but perhaps the 5V isn't even connected to the boards ?

  • @hitsware2 said:

    @"Buck Rogers" said:

    Take a look at the OEM Stamp components. The schematic for the Stamp is documented. And it would be an interesting exercise.

    I don't see anything there. Maybe could simply jump from the USB connector ,
    but perhaps the 5V isn't even connected to the boards ?

    Did you look for the documents? They do publish them. It's the contents of the programming on the part we do not need to worry about. The idea was that you'd wire the 5V and Gnd connections to the regulator connections to the rest of the system. Although most of us run our boards on battery power, either 9V rectangular ones or in my case a pair of rechargeable batteries.

    Mascot not involved in this discussion.

    But why is there a crowd of bored mountain lions going from house to house in an area of LA?

  • Buck RogersBuck Rogers Posts: 2,045
    edited 2021-05-10 14:49

    @Publison said:
    I do not think any of the BS2 boards can be powered by USB.

    EDIT: Updated response.
    Indeed not. That's the one part of the USB standard not implemented completely here. However one board does use the entire USB connection as its methods of both power and programming.

  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,049
    edited 2021-05-09 03:43

    Indeed not. That's the one part of the USB standard not implemented here.

    Once again (!), see:

    https://www.parallax.com/product/basic-stamp-2pe-motherboard/

    It's a BS2 board that can be powered and programmed via USB.

    -Phil

  • @"Phil Pilgrim (PhiPi)" said:

    Indeed not. That's the one part of the USB standard not implemented here.

    Once again (!), see:

    https://www.parallax.com/product/basic-stamp-2pe-motherboard/

    It's a BS2 board that can be powered and programmed via USB.

    -Phil

    Hello!
    Phil I know about that one. But, however, he was asking about generic ones. Sadly according to the page it has become EOL.

    Mascot still asleep.

  • And now your response @"Phil Pilgrim (PhiPi)" your response is need of updating as I added to it what I recalled about the board that you remarked about.

  • Parallel C3 & C1 ?

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