Subject:
|
Re: Poor man's Tachometer
|
Newsgroups:
|
lugnet.robotics
|
Date:
|
Tue, 31 Aug 1999 02:02:57 GMT
|
Original-From:
|
Brian B. Alano <alano@kiva*NoMoreSpam*.net>
|
Viewed:
|
790 times
|
| |
|
|
Laurentino Martins wrote:
> Hello,
>
> I'm probably not the first doing this, but since everyone has touch sensors I decided to improve a bit the usefulness of it.
> What you see in the gif (it's only 2K) it's a tachometer out of a touch sensor (CyberMaster) and a technic 8 tooth gear.
> Note: This is the ideal gear since the tooth are more spaced than the larger ones.
>
> There are two catches in this:
> 1.
> You must build it in a way that the gear never touches the touch sensor body (cyan) but firmly presses down the button with each tooth.
> What I've done is to create two rings about half the height of a plate that are introduced between the cross-axles and keep that distance always perfect (not shown).
Would sandwiching a rubber band in place of the 1/2 height rings give you enough spacing? A single white band could probably be wrapped around both of the cross-axles, and it would keep the Lego-purists happy.
I like your design--it's the most compact one I've seen. The EDGE detection gives me an idea. If the 8-tooth gear were replaced by some asymmetric part (I can't think of one), could it be used to determine direction as well as speed? I
vaguely recall some hurricane-shaped part--maybe not a Lego one, that might work. Even something comma shaped would do the job. Rotating in one direction, the "climb" to the edge would be swift and then drop gradually. In the other
direction, it would climb gradually then drop suddenly. Is this workable?
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
|
|
1 Message in This Thread:
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
Active threads in Robotics
|
|
|
|
|
|
