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61  Forum 2005-2010 (read only) / Troubleshooting / Re: capacitors for controlling DC motors? on: September 15, 2010, 08:55:22 am
For the same gearbox, I built an h-bridge then switched to this board http://www.solarbotics.com/products/k_smd/.

I switched to save bread board space. The separate pcb for each motor is more elegant, though pricey.

You might consider it, if your wiring gets unwieldy.

62  Forum 2005-2010 (read only) / Troubleshooting / Re: greyed serial port on: June 11, 2010, 09:29:22 pm
Are you saying from the Arduino IDE menu, when you select Tools, Serial Port, all the choices are grayed out?

For windows 7, 64 bit, download and install http://www.ftdichip.com/Drivers/VCP.htm

I had windows 7, 64 bit, so I'm not sure if this applies to the 32 bit version. I recall installing the drivers under windows XP and mac OS X too.
63  Forum 2005-2010 (read only) / Troubleshooting / Download problem with Ardweeny on: May 20, 2010, 11:32:16 am
I got this with my Ardweeny:
avrdude: stk500_getsync(): not in sync: resp=0x00
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51

It would happen with both Mac and PC (w/System 7 Home Premium).

It was fixed by removing the Ardweeny from the breadboard  smiley

This kit involves soldering pin strips to the ATmega328 pins. I guess the stretch from the breadboard broke some connections. I'm not sure what else it could be as the breadboard had no other connections.

Also, I had to install the FTDI drivers on System 7. This seems to only be required by some System 7 users. In programing environment, no serial ports were listed. Under Device Manager, Ports (COM & LPT), it should list USB Serial Port (COM3 or some other port). Right clicking on USB Serial Port should say it is working properly. If it shows up under another heading and right-clicking says no driver installed, then driver installation is required.

64  Forum 2005-2010 (read only) / Troubleshooting / Re: Arduino Duemilanove with Vista can't Upload Sketch on: February 03, 2009, 10:09:10 pm
Not exactly.

I have a diecimila, a duemilanove, and a spare AVR.

diecimila - works
duemilanove - can't upload
duemilanove with spare AVR - can't upload
----
Since diecimila works, failure is probably due to duemilanove incompatibility or duemilanove hardware failure.
----
If RX and TX lights are controlled by FTDI chip, then FTDI chip failure sounds likely.
-----
MProg hung. Couldn't kill from task manager. Vista !#$@s
Drivers installed in November. Have reinstalled before.
Maybe its FTDI. Maybe its Vista. Maybe its driver.
AdaFruit says they will replace board.
Time to let it go.  >smiley-sad
Thanks for the help westfw. smiley-wink
65  Forum 2005-2010 (read only) / Troubleshooting / Re: Arduino Duemilanove with Vista can't Upload Sketch on: February 02, 2009, 10:21:34 pm
Uploading with upload.verbose on:
-v -v -pm168 -cstk500v1 -P\\.\COM4 -b19200 -D -Uflash:w:C:\Users\Andrew\Documents\Arduino\test_blink\applet\test_blink.hex:i



avrdude: Version 5.4-arduino, compiled on Oct 11 2007 at 19:12:32
         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/

         System wide configuration file is "C:\dev\arduino\arduino-0012\hardware/tools/avr/etc/avrdude.conf"

         Using Port            : \\.\COM4
         Using Programmer      : stk500v1
         Overriding Baud Rate  : 19200
avrdude: ser_open(): setting dtr
avrdude: Send: 0 [30]   [20]
avrdude: Send: 0 [30]   [20]
avrdude: Send: 0 [30]   [20]
avrdude: Recv:
avrdude: stk500_getsync(): not in sync: resp=0x00
avrdude: Send: Q [51]   [20]
avrdude: Recv:
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51

avrdude done.  Thank you.
-----------
Sounds like same issue as "Re: avrdude: not in sync again"
-----------
Swapped ATMEGA168, downloaded and got some error message.

66  Forum 2005-2010 (read only) / Troubleshooting / Arduino Duemilanove with Vista can't Upload Sketch on: February 01, 2009, 10:31:00 am
IDE reports:
Binary sketch size: 1124 bytes (of a 14336 byte maximum)

avrdude: stk500_getsync(): not in sync: resp=0x00
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51

---------
Arduino IDE is 0012 Alpha.

Uploading works properly with a diecimila. I have two and can just swap them.

LED lights with both boards follow:

Arduino Diecimila with Vista
On power up, the PWR LED goes green. The L LED blinks irregularly for about 3 seconds, goes on for about 1/2 second and then executes the previously loaded sketch.

Blinks 3 times rapidly, goes dark for about 15 seconds, resumes the last loaded sketch.

Arduino Duemilanove with Vista
On power up, the PWR LED goes green.
The L LED
 blinks once quickly
 is off for about 1 second
 blinks 3 times, 3 times, 3 times, 2 times over about 3 seconds
 goes dark for about 1/2 second
 blinks rapidly forever.
The TX and RX lights blink 3 times.

Pressing reset causes the L LED to blink rapidly forever.
The TX and RX lights stay dark.

I'm guessing the rapid blinking is the last uploaded sketch running.
------------
Does the rapid blinking of the LED on reset indicate a problem with the bootlegger?
67  Forum 2005-2010 (read only) / Troubleshooting / Arduino Diecimila won't Download sketchs on: November 12, 2008, 11:38:08 pm
I've used my Arduino Diecimila for several weeks, but now it won't download a sketch from my Vista PC.

Here is what happens"
1) On power up:
    power led goes on.
    tx and rx blink for a couple of seconds, then go dark
2) On upload sketch:
 tx and rx blink for 10-20 seconds, then go dark
 L blinks
 No errors on PC, but nothing works.
3) Upload again,
 L continues to blink
PC reports "Problem uploading board"
avrdude: stk500_getsync(): not in sync: resp=0x00
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51

How is this debugged? Should board be replaced or bootloader reprogrammed? Is it worth replacing ATMEGA168 chip rather than whole board?
68  Forum 2005-2010 (read only) / Development / Re: Persistence of vision question on: December 24, 2010, 10:04:11 am
Look at the pic: http://www.ladyada.net/images/spokepov/make/cutled.jpg

The row of LEDs facing down has been inserted. You can't see the LEDs, but you can see the leads which are ready to be soldered and clipped. The row of LEDs facing up go in the top row of circles.

And the parts lists says 60 high intensity LEDs. Each row has 30.

This also answers your question about row positioning. It apparently does not matter if you shift the row parallel to the spoke.


69  Forum 2005-2010 (read only) / Development / Re: Persistence of vision question on: December 23, 2010, 08:43:19 pm
The horrible one I made was visible during daylight, but much more dramatic at night. The pics of SpokesPOV look light dusk and dark.

I'm sure AdaFruit spent some time seeing which LEDs mounted at which angles worked best. I think she put 2 rows of leds, one facing right and one facing left: http://www.ladyada.net/make/spokepov/make.html

This has less info, but sounds like the same general idea:
http://www.hokeyspokes.com/faquestions.htm

Are you making a pcb? Do you make them yourself or send them out?
70  Forum 2005-2010 (read only) / Development / Re: Persistence of vision question on: December 23, 2010, 08:02:21 am
Right, but it's $99 a wheel. That's $400 just for my kids bikes.
71  Forum 2005-2010 (read only) / Development / Re: Persistence of vision question on: December 22, 2010, 01:41:48 pm
An arduino with 8 LEDs is easy. The hard part of doing a project like SpokePOV or Hokey Spokes is supporting more LEDs and synchronizing multiple spokes.

Synchronizing multiple spokes is needed to obtain persistance without spinning so fast. Supporting 25-30 LEDs is difficult because of the wiring. How do you wire an atMega, 4 8-bit latches and ~30 leds without a PCB? The wiring gets a bit messy.

And you can't ignore cost. With three spokes per wheel, you are looking at 6 spokes per bike. I've got 4 bikes.

Some kind of open source pcb, group buy is needed...
72  Forum 2005-2010 (read only) / Development / Re: swarm , find position of robots on: November 08, 2010, 02:01:28 pm
codeRobo,

What are you thinking of making? A friend of mine was thinking of making a simulator for bee attacks.
73  Forum 2005-2010 (read only) / Development / Re: swarm , find position of robots on: November 08, 2010, 01:55:31 pm
Encoders or dead reckoning should prove accurate to 20%. The big disadvantage is that slippage won't be picked up. You might consider something like this for direction (but not distance): http://www.pololu.com/catalog/product/701 I don't think there is a cheap solution. :-[
74  Forum 2005-2010 (read only) / Development / Re: Breadboard Arduino + Nokia 3310 LCD shield on: November 08, 2010, 01:46:17 pm
It sounds like your home built Arduino is working properly. I assume it does something like send serial diagnostics to your computer or lights an led to confirm this?

Make sure you have the right pin. It's easy to mess up the mappings when they are not labeled on the pcb. You could connect an led and download a sketch to blink it real quick. I'd also try another pin just in case their is an issue with that one and check connectivity on all lcd connections with voltmeter.

But to answer your question about bread board wiring, we really need a picture of it (or a schematic). Can you post a pic?
75  Forum 2005-2010 (read only) / Development / Re: simplest Radio link on: September 25, 2010, 11:23:48 pm
Infrared can work 30 ft plus. Try a better led and receiver. For 360 degree support, you may want multiple leds and receivers. There are several threads on this forum discussing this.

Have you made any progress on the ultrasound portion? What parts were you thinking of using?
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