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nice little h-bridges — Parallax Forums

nice little h-bridges

Graham StablerGraham Stabler Posts: 2,510
edited 2011-10-07 06:26 in Propeller 1
Any suggestions for particularly nice h-bridges for interfacing to the propeller, currents less than an amp are fine. Something without much external circuitry preferred. No size limits, SMT is OK.

Thanks

Graham

Comments

  • RobotWorkshopRobotWorkshop Posts: 2,307
    edited 2011-10-06 10:24
    You could try the L293 or TI754410 H-Bridge chips. You can double up the TI chips if you need a bit more current capacity.
  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2011-10-06 10:25
    These should work okay with the Propeller:

    -Phil
  • Graham StablerGraham Stabler Posts: 2,510
    edited 2011-10-06 10:31
    Thanks RW and Phil,

    The Vishay part looks great, actually the selection seems much better than I remember when I looked in the past, feel a bit silly asking now. Possibly it was because I was trying to find ultralight stuff.

    Graham
  • Beau SchwabeBeau Schwabe Posts: 6,568
    edited 2011-10-06 15:15
    Graham Stabler,

    The Vishay part was the driver of choice for many prosthetic hands to control Open Close and Rotation in our designs 15 years ago. For 1Amp you can't beat it, but you might want to put a metal slug to dissipate the heat if you run close to 1 Amp for long periods.
  • M. K. BorriM. K. Borri Posts: 279
    edited 2011-10-07 00:21
    I swear by the L298 most of the time. The rest of the time I swear at it.
  • Graham StablerGraham Stabler Posts: 2,510
    edited 2011-10-07 00:38
    I did think about the "classics" but they seem so big these days, plus I don't need such large drive voltages.

    The Vishay chip looks excellent and there is a slightly newer version that allows switching rates up to 500khz. I'll be using them well below the rated current so I fairly happy they will do the job and should be rather neat.

    Cheers,

    Graham
  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2011-10-07 03:43
    Solarbotics has a nice little L298 board. The pins are not really suitable for a DIY as they are not a .1 grid. Still, at less than an amp, it may just be easier to build from scratch with four MOSfets.

    Then there is this...
    http://www.parallax.com/Store/Accessories/MotorServoControllers/tabid/160/ProductID/66/List/1/Default.aspx?SortField=ProductName,ProductName
  • LeonLeon Posts: 7,620
    edited 2011-10-07 04:37
    I've got some DIL8 Sanyo LB1630 chips for use with 3V motors (up to 400 mA). No external parts are required.
  • Graham StablerGraham Stabler Posts: 2,510
    edited 2011-10-07 05:08
    That's a handy little chip, DIL too but I think I'd like potential (no pun intended) for a slightly higher drive voltage, though at the moment it is far from decided.

    Graham
  • LeonLeon Posts: 7,620
    edited 2011-10-07 06:26
    It's actually obsolete, although they are still available. The replacement is surface-mount only. I intend to use them with the 3V motors supplied with the Tamiya motor/gearbox kits.
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