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46  Community / Exhibition / Gallery / Re: Magnetic levitation on: September 23, 2013, 06:49:13 am
Nice project! I've always considered creating my own. Where can I find one of the large coils? Would a speaker work once the back paper is pulled off?
47  Using Arduino / Microcontrollers / Re: 328P micros possibly damaged, initialization failed, rc=1 on: September 23, 2013, 06:43:58 am
After working on the board the next morning I discovered another hardware issue on the power supply that was causing the problem. I removed the three micros with a hot air tool to another board and they work fine.

Mike
48  Using Arduino / Microcontrollers / Re: 328P micros possibly damaged, initialization failed, rc=1 on: September 22, 2013, 04:36:38 am
It sounds like it may still be possible to recover them after all. That's great! I'm using 8Mhz resonators right now.
49  Using Arduino / Microcontrollers / 328P micros possibly damaged, initialization failed, rc=1 on: September 21, 2013, 08:10:02 pm
I may have damaged a few 328P micros while trying to get bootloaders in using a AVRtinyISP through the IDE. After going through three brand new 328P I discovered that I has a 10Meg pull up resistor in the reset line instead of a 10K. When programming in the bootloader with 10M resistors in place I could start installing the bootloader but it would give an error message at the final stage. Now that the proper 10K is in place when I try and put in a fresh bootloader I get an immediate error message of initialization failed, rc=1. Is there an easy way to save these micros? I've also tried programming in a blink sketch directly, without any bootloader at all but I get the same error message.
50  Using Arduino / Project Guidance / Re: Burning the Bootloader with Arduino v1.0.1 on: September 20, 2013, 06:35:17 am
A while ago I started making my own Arduino derivatives and had success burning bootloaders into different Atmel chips. Check out https://sites.google.com/site/0miker0/Designing-your-custom-Arduino-Board

Mike
51  Products / Arduino Yún / Re: Places to buy in the US? on: September 12, 2013, 06:18:02 am
I signed up on the Adafruit site to be notified when they are in stock which hopefully will be very soon. 
52  Topics / Product Design / Re: PCB manufaturers in Canada on: September 12, 2013, 06:15:39 am
For work projects I use http://www.apcircuits.com/ which does cheap prototype boards but has expensive shipping. For my hobby designs I also use oshpark but getting it though customs up here takes 3-4 weeks.

Mike
53  Using Arduino / Microcontrollers / Re: Faster i2c speed? on: August 31, 2013, 03:47:08 pm
All delays have been removed and the display is i2c which I believe is slower than SPI. I found something of interest here: http://forum.arduino.cc/index.php/topic,16793.0.html
Faster i2c was just an idea and a possibility for a quick fix.
54  Using Arduino / Microcontrollers / Faster i2c speed? on: August 31, 2013, 07:47:35 am
I have an 8Mhz 328P with an animation on a small i2c display working pretty slow. I thought I could speed it up slightly by adding the line TWBR = 12, 2 or 24 to the void setup(void) under wire.begin(); but the animation speed is always exactly the same. Overclocking for test purposes is fine.
55  Using Arduino / Storage / Re: Anybody need memory cards? on: August 28, 2013, 11:30:15 am
I could grab 10pcs or so but 600 pcs is pretty crazy.
56  Development / Other Hardware Development / Re: Leonardo clone circuit check on: August 23, 2013, 05:22:33 am
I have pin33 connected directly to ground but your goes through a 10k resistor. Not sure if it matters so you should check the data sheet. I think it has something to do with the bootloader on power up. Other then the VUSB to ground mentioned way back your schematic looks good. Sorry for leading your post in a different direction but it's started some interesting discussions.
57  Development / Other Hardware Development / Re: Leonardo clone circuit check on: August 22, 2013, 08:55:27 am
Thanks for the feedback CrossRoads. I've updated the schematic with the 22R D+ & D- resistor values as well as changing the 10K i2c pullup values to 4.7K.
I've read that others have overclocked the 32u4 @ 16Mhz with good results. The only reason i'm doing this is because I use the default Leonardo bootloader and program blank chips using the USBtinyISP. If I ever figure out how to tweak the frequency then I'll give it a try along with a modified PID/VID.

About the SPI SS line. Right now SPI only talks to the SD card. Should the SD_CARD_CS line on the SD card holder be connected to the 32u4 pin 8 PB0(SS/PCINT0) ? Right now I can read and write to the SD card so I must have the SS line configured as an output.

S2 is just a simple pushbutton so I have the 10K pull down as used in all the simple button examples. http://arduino.cc/en/tutorial/button

Mike
58  Development / Other Hardware Development / Re: Leonardo clone circuit check on: August 22, 2013, 07:24:40 am
Looks good to me.
59  Development / Other Hardware Development / Re: Leonardo clone circuit check on: August 22, 2013, 06:41:14 am
This is my 32u4 working at 3.6v connected to a 5v usb connector. it works fine so far but feel free to make any comments CrossRoads on how it can be improved.
60  Development / Other Hardware Development / Re: Leonardo clone circuit check on: August 21, 2013, 02:23:46 pm
I've done two working designs using the 32u4. One is like yours with Vcc @5v and other one split up. The USB parts @5v and Vcc @ 3.3v. Just send let me know if you're interested in the other schematic.
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