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 Robotics / Handy Board / *19 (-10)
  Some quest. for details
 
Hi there, last week I've got my HB up and running and it works very fine. I've been playing around with it IC and some questions came up. I hope they are not too boring: - I don't know exactly in which manner sleep() works. It looks like being a mix (...) (29 years ago, 5-Feb-96, to lugnet.robotics.handyboard)
 
  Re: resistors w/motors?
 
At 1:43 PM 2/4/96, Jeffrey Keyzer wrote:>> (...) How about using some power zener diodes to drop the voltage: |----[-power diode+]----[+zener diode-]------| L293D ----| |------| | |----[+power diode-]----[-zener diode+]------| | | [motor] | | (...) (29 years ago, 5-Feb-96, to lugnet.robotics.handyboard)
 
  3V motors w/handy board
 
Perhaps it would be best if first I could find a solution to this problem - What's the best way to drive 3V motors with the handy board? If I can solve this, I can really broaden my horizons as to the types of things I can use with the handy board. (29 years ago, 5-Feb-96, to lugnet.robotics.handyboard)
 
  Re: hmph
 
(...) Be careful. Cheap RC cars tend to use 3v motors that want to draw a fair bit of current. Expensive RC cars use motors in a better voltage range for the HB (.e.g, 8.4 or 9.6v), but they draw serious current (5 to 10A easy). -F (29 years ago, 5-Feb-96, to lugnet.robotics.handyboard)
 
  Re: resistors w/motors?
 
(...) The problem with that solution is that the motors are driven bidirectionally - a regulator wouldn't work when the polarity it was given was reversed. (29 years ago, 4-Feb-96, to lugnet.robotics.handyboard)
 
  resistors w/motors?
 
I'm curious - can I limit the voltage to a motor by putting a resistor in series with it? What are the pros and cons of this solution? I have a bunch of low voltage (3V) motors that I'd like to be able to use with the handy board, but giving them (...) (29 years ago, 4-Feb-96, to lugnet.robotics.handyboard)
 
  Re: hmph
 
(...) That's a definite possibility. However, I'm looking more for something that has a tread-type drive system, though two independently driven wheels is fine. That allows me to simplify steering the robot, so that I can rotate it at a point. (...) (29 years ago, 4-Feb-96, to lugnet.robotics.handyboard)
 
  Re: hmph
 
(...) How about buying a $15 RC car from radio shack and adding a $15 servo to do the front steering? I haven't tried it. I'm using RC-10 cars and they're GREAT. Independent suspension, hispeed, good traction... but several hundred dollars. -- (...) (29 years ago, 4-Feb-96, to lugnet.robotics.handyboard)
 
  Re: HB died - HELP
 
Keith, You may have shorted something out while connecting up the battery. I've seen this before, and parts do fry if you connect them to 9.6v. If while you had the battery ground lead connected, you just brushed the +v lead onto some pins, that (...) (29 years ago, 4-Feb-96, to lugnet.robotics.handyboard)
 
  HB died - HELP
 
HELP . . . My HB has stopped going into bootstrap mode. Hope someone out there can help!!! The HB had been working fine. I was having fun with IC, and I finally got around to the Fuse and Battery final assembly (Part 6 of the assembly instructions). (...) (29 years ago, 4-Feb-96, to lugnet.robotics.handyboard)


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