Show Posts
Pages: 1 ... 3 4 [5] 6 7
61  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Increase servo angle on: May 29, 2009, 03:58:00 pm
They all have a "hard stop" on one of the gears, first you'd have to remove that with a hand file or something.  Then you'd have to replace the position sensor (usually a pot) with something that could read the additional angle - that won't be so easy to do.

If I were to do it, I would mount the pot external to the servo case, and use some gears to reduce the post travel relative to the servo horn - but that might add a lot of play and jitter.

There are RC "winch servos" for RC sail boats, but I think they are just a continuous rotation servo.

Are you looking to increase a linear deflection, or an increased rotation of what you want to move?
62  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: If someone asked you how "fast" an ardui on: May 25, 2009, 09:21:21 pm
Bumping this thread...

So then, how mush faster is an Arduino Mega?  (Just trying to wrap my head around the relative speeds of things.)
63  Forum 2005-2010 (read only) / Frequently-Asked Questions / If someone asked you how "fast" an ardui on: March 21, 2009, 12:52:36 am
If someone asked you how "fast" an arduino is.........what would you compare it to?  Say you were talking someone not familiar with microprocessors in general.

Could it be **roughly** compared to some computer of the past?  Say an early 8088?  An old Atari/Commodore/Timex Sinclare/ect...?

64  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: arduino and sensor needed/ will pay on: May 15, 2009, 09:30:54 pm
A trip to the hardware store could build the same thing:
(but it will be more fun with the arduino)


[size=24]+[/size]

[size=24]+[/size]




65  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: looking for a silent servo on: May 15, 2009, 10:26:00 pm
Could a stepper motor and a rubber band/pulley set up be used?
66  Forum 2005-2010 (read only) / Frequently-Asked Questions / Good (college) programming lectures class online.. on: May 07, 2009, 10:28:26 pm
I was looking for a quick refresher in C and found this.  Specifically they are programming in gcc - but most of the ideas translate to the arduino.  It doesn't go into the detail that my classes did, but the teacher is really great!

Let me know if you find other lectures that might be nice!

http://www.youtube.com/view_play_list?p=6B940F08B9773B9F&search_query=unsw%20engineering&page=1

Also  if anyone wants to follow along -  the class notes and things are here:  http://mahler.cse.unsw.edu.au/webcms2/course/index.php?cid=2032
67  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Noob question: How do I pick the right board? on: April 22, 2009, 01:37:55 am
I'd actually recommend starting with a Basic Stamp if you don't have any experience programming.  Stamps are a bit easier to program on.

Stamps have a lot of good educational tutorials on their web site http://www.parallax.com/

The down side to that that they cost more up front($80? vs $30), and if you blow it up, it cost MUCH more for a new chip ($40 vs. $5) for the arduino.
68  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: playing sound files? on: April 19, 2009, 09:08:18 pm
Some car alarms have the sound generator built into the horn.  All they need is 12v.  That would be quick and easy.

Or do you want to customize the sound?
69  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: What do the two caps connected to the crystal do? on: April 20, 2009, 05:25:35 pm
Thanks - both posts were helpful.
70  Forum 2005-2010 (read only) / Frequently-Asked Questions / What do the two caps connected to the crystal do? on: April 18, 2009, 09:16:51 pm
What do the two caps connected to the crystal to ground do?

(C2 and C3 as seen here:  http://www.arduino.cc/en/uploads/Main/Arduino-Diecimila-schematic.pdf

The schematic calls for two 22pF caps.  If I wanted to breadboard/"one-off" an arduino clone, do I need to stick to that exact value?
71  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Can I do this? LCD+Arduino = fast moving display? on: April 16, 2009, 11:06:25 pm
Well, I assume the graph is made by using custom characters on a basic character LCD.  I think I'll try out the new I2C LCD's and see if that can do what I am wanting.
72  Forum 2005-2010 (read only) / Frequently-Asked Questions / Can I do this? LCD+Arduino = fast moving display? on: April 13, 2009, 11:17:55 pm
I wanted to read a sensor and display it's value as a bar graph on a LCD.

Something like this, but it doesn't need to be quite as fast.  But should be able to do a full sweep in, say 1/2 a second.

[media]http://www.youtube.com/watch?v=CGrBxH7qL94&feature=related[/media]

I've seen some work with arduinos and LCD's and most of them look quite slow. (nothing like the video above)

So, questions:

1.) Is there anything to gain by using a hd44870 compatible controller?  Or should I be looking at something else?

2.) Will I be able to have the speed/fps/refresh rate that you see above?  Is that a function of the uC?  Or the LCD?

Thanks!  I'm ready to buy, I just wasn't sure what I should be looking at getting.
73  Forum 2005-2010 (read only) / Frequently-Asked Questions / Part for bread board jumper wires? on: April 19, 2009, 08:21:09 pm
I wanted to make up some of my own custom length solderless breadboard jumper wires.

Anyone know where I can buy ends like this?


74  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Language Reference manual - Hard Copy on: March 28, 2009, 06:08:29 pm
Nice link florinc,  Thanks!
75  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Traffic Simulator on: March 21, 2009, 12:56:59 am
Hmmm - I'd be concerned with 10 small cars in a small area all pinging out ultrasound that you might get some interference in there somewhere.

Anyone know what they use during robot "battle bots" competitions?

What if all the cars could talk over IR - and each one would have a time slot when it could ping, one at a time?
Pages: 1 ... 3 4 [5] 6 7