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[on:]

Hi Everyone

I have a project which is space sensitive and basically requires only one analog input. The device should however be automatically recognized (as in, I dont want to worry "which com port is it" as I have to do with Arduinos)

I like the teensey, becouse rumor has it I cen let it emulate a USB device: http://www.pjrc.com/teensy/

I like this formfactor a *lot*: http://www.phidgets.com/products.php?category=0&product_id=1011

Both of these products feel overkill for my needs though.

What I want to do is basically create an additional scroll-wheel for moving through contents, such as a website. It should have the form-factor of a flash-drive, or usb dongle.

Any suggestions?

Thanks

P.

[Reply #1 on:]

Can you just plug in one of the little laptop wireless mouse kind of thing?
Best buy shows 157 different models, here's an inexpensive one.
http://www.bestbuy.com/site/Dynex%26%23153%3B+-+Wireless+Optical+Mouse+-+Gray/2380794.p?id=1218323850772&skuId=2380794

[Reply #2 on:]

hm. I would actually like to directly attach a potentiometer to my computer. I am sure there are some hacks which will have the same effect, but I want to figure out how to do it my (maybe more complicated) way:

take some analog sensor (i.e. potentiometer) --> connect it to some type of A/D converter --> connect it via USB to a computer --> have the computer recognize the device as the scroll wheel of a mouse

In the end I want a little USB dongle, with a twistable nob, which I can just plug into my laptop and scroll through text.

(and yes, its a gross oversimplification of what will be going on.)

Is this clearer?

Any suggestions?

[Reply #3 on:]

as far as i know teensy uses an atmel chip that has built in usb support

for your project you need to look at some usb implementations for atmel
vusb http://www.obdev.at/products/vusb/index.html
usbtiny http://dicks.home.xs4all.nl/avr/usbtiny/

hope this helps

[Reply #4 on:]

I'm a big fan of the Teensy.  I have several and they have served me very well.

Given the fact that you are building an HID device, the Teensy is a very good choice...

http://pjrc.com/teensy/usb_keyboard.html
http://pjrc.com/teensy/usb_mouse.html
http://pjrc.com/teensy/td_keyboard.html
http://pjrc.com/teensy/td_mouse.html

The price is certainly reasonable ($16).  And, the Arduino IDE enhancements are a nice bonus.

[Reply #5 on:]

I remember seeing this a long time ago. Looks like it supports hid, so im sure you could emulate a scroll wheel. http://yveslebrac.blogspot.com/2008/10/cheapest-dual-trace-scope-in-galaxy.html

[Reply #6 on:]

thats pretty sweet. thanks for the link, bilbo :-)