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Help building range unit — Parallax Forums

Help building range unit

ArchiverArchiver Posts: 46,084
edited 2001-07-18 21:01 in General Discussion
Hello,

I'm fairly new to Basic stamps and even electronics as a whole, but
my latest project (converting my old RC tank w/shorted out circuit
board into a high-speed all-terrain robot) is coming along quite
well. I have the LCD dislpay for feedback, switches and pushbuttons,
the microcontroller, and the motors are already built in. My motor
control and voltage regulator chips should hopefully be here in a few
days. that leaves one thing: range detection and obstacle
avoidance.

A while ago I purchased 2 Radio Shack infrared modules (276-137b) and
have found them useful for basic proximity detection at a set
distance. I believe they can be modified, however, by soldering a
wire directly to the infrared detector inside of the unit. Does
anyone have experience with changing these devices into range sensing
units?

I also noticed that Radio Shack has ultrasonic transucer senders and
recievers on their web page for $5 each. does anyone know how to use
these in a range sensing system?

If there are any other reccomendations for sensors I would really
like to know. I basically would like to have my robot to detect at
least 8 feet ahead, and have a 90* sweep using a stepper motor or
servo.

Thanks!

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2001-07-17 20:53
    A great place to start is the Acroname website
    http://www.acroname.com/index.html
    They have many differant sensors for robots that will run with the basic
    stamps. They also have working basic stamp code examples for each sensor
    they sell. click on the link that says SENSORS under the "Our products" window.
    I would recommend the Devontech Range sensor. It is an excellent sensor and
    will pick up narrow obstacles that many other sensors will not.

    At 07:44 PM 7/17/2001 -0000, you wrote:
    >Hello,
    >
    >I'm fairly new to Basic stamps and even electronics as a whole, but
    >my latest project (converting my old RC tank w/shorted out circuit
    >board into a high-speed all-terrain robot) is coming along quite
    >well. I have the LCD dislpay for feedback, switches and pushbuttons,
    >the microcontroller, and the motors are already built in. My motor
    >control and voltage regulator chips should hopefully be here in a few
    >days. that leaves one thing: range detection and obstacle
    >avoidance.
    >
    >A while ago I purchased 2 Radio Shack infrared modules (276-137b) and
    >have found them useful for basic proximity detection at a set
    >distance. I believe they can be modified, however, by soldering a
    >wire directly to the infrared detector inside of the unit. Does
    >anyone have experience with changing these devices into range sensing
    >units?
    >
    >I also noticed that Radio Shack has ultrasonic transucer senders and
    >recievers on their web page for $5 each. does anyone know how to use
    >these in a range sensing system?
    >
    >If there are any other reccomendations for sensors I would really
    >like to know. I basically would like to have my robot to detect at
    >least 8 feet ahead, and have a 90* sweep using a stepper motor or
    >servo.
    >
    >Thanks!
    >
    >
    >
    >
    >
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    Sincerely
    Kerry
    Admin@M...
    WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
    Kerry Barlow
    p.o. box 21
    kirkwood ny
    13795
  • ArchiverArchiver Posts: 46,084
    edited 2001-07-17 21:17
    I don't know how I missed that sensor when I went to that web page a
    little while ago! That fits my specification perfectly! It's small,
    should mount easily on a stepper motor for rotation, and
    inexpensive! Thanks, i'll probably order one next week.

    If there's any other reccomended sensors, I would still appreciate
    the input, though this sensor looks really good!


    --- In basicstamps@y..., Kerry Barlow <admin@m...> wrote:
    > A great place to start is the Acroname website
    > http://www.acroname.com/index.html
    > They have many differant sensors for robots that will run with the
    basic
    > stamps. They also have working basic stamp code examples for each
    sensor
    > they sell. click on the link that says SENSORS under the "Our
    products" window.
    > I would recommend the Devontech Range sensor. It is an excellent
    sensor and
    > will pick up narrow obstacles that many other sensors will not.
  • ArchiverArchiver Posts: 46,084
    edited 2001-07-18 21:01
    I'd just like to check on this. Is there any way I could use
    ultrasonic transudcers alone (without the board) with some form of
    oscillation (555-timer circuit or crystal) and BASIC Stamp code,
    maybe using the RCTime command? I know the kits don't cost much and
    would be more efficient, but I want the transmitter to be placed a
    few inches away from the reciever, and I definitely don't want to
    start desoldering a pre-made board. I'll use a pre-made one if
    necessary, but i'd prefer to have the scanning part as small as
    possible. Thanks!
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