On Fri, Jan 7, 2011 at 4:59 PM, Walter Bender <[email protected]>wrote:
> On Fri, Jan 7, 2011 at 4:54 PM, Martin Langhoff > <[email protected]> wrote: > > On Fri, Jan 7, 2011 at 4:32 PM, Rafael Enrique Ortiz Guerrero > > <[email protected]> wrote: > >>> is there a standard-ish Arduino robot + sensots kit I can buy? I don't > > ... > >> No that i know, best shot for now is hacking or working with > >> handmade analogue and digital sensors, like the ones used for turtle-art > >> sensors. > > > > Hmmm. Looking at the NXT, and the little I know of Arduino, it's clear > > that to work in a user-friendly manner in something like TA, you have > > to make some assumptions about which sensor goes into each input; > > which motor to which controller, and how to pair up the tachometers > > with the right motor. > > > > That is because in a graphical programming environment, you want to > > offer "easy" sensor and motion blocks. To make that happen, you need > > those assumptions. > > > > For a full-blown programming env (C, python, etc), where users are > > expected to have variables, and can call functions with many named > > parameters, it's ok to use "raw" input/output ports. It's up to the > > user to "map" those using variables or constants. > > > > So for example, in the case of NXT, if you are going to use the > > graphical NXT-G you have to put the right sensor in the right port, > > same with motors. So NXT-G has a "read distance sensor" block that > > you can put in an if condition. And "run left motor" block. And "run > > both motors forward, synchronized via tachometer". > > > > Those blocks make it easy and fun and that's where I think we need to be > headed. > > > > So I'd strongly suggest (for an initial implementation) settling on an > > arduino set that has a couple of sensors, and 2 motors with > > tachometers. Light-color sensors are great because you can get started > > with "follow the border of the thick black line" programs. > > > > If we go that way, we can have various "modes", matching the robot and > > motor/sensor configurations -- NXT, various Arduino models, etc. > > > > This has a conceptual basis that one might follow in order to know which and what sensors to use, and which projects to implement http://wiki.laptop.org/go/Education_and_Psychology Looking at various of the basic robotics projects that a children can make > I think we have a pretty good handle on auto-detecting the NXT. If we > can do the same for Arduino, we can have the appropriate palettes just > appear when needed all from one codebase > > If someone wants to override the simple assumptions above, they have > the option of using a Python block and/or jumping into the code > itself. For the former, we could bundle in some examples. > We had some examples working with turtle art and arduino http://wiki.sugarlabs.org/go/Development_Team/Arduino#Turtle_Art should be easy to complement those.. > -walter > > > cheers, > > > > > > > > m > > -- > > [email protected] > > [email protected] -- School Server Architect > > - ask interesting questions > > - don't get distracted with shiny stuff - working code first > > - http://wiki.laptop.org/go/User:Martinlanghoff > > > > > > -- > Walter Bender > Sugar Labs > http://www.sugarlabs.org >
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