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1  Topics / Home Automation and Networked Objects / Re: How to dispense laundry soap on: October 04, 2012, 08:27:23 am
Look into finding a dosing pump. I use them to keep proper levels of calcium, alk in my aquarium automatically, they are quite accurate.
2  Using Arduino / Microcontrollers / Re: Burning Arduino UNO Bootloader with AVR Dragon and AtmelStudio on: October 04, 2012, 08:23:00 am
It really shouldn't matter weither you use it as a due or uno, that specific chip is on both the r3 uno and the due. If your Arduino software on your computer is outdated it may not know that the new uno also uses that chip.

But for your case it really shouldn't matter.
3  Using Arduino / General Electronics / Re: Stuck copper in PWM on: October 03, 2012, 12:15:49 pm
Absolutely remove the plastic housing, the housing usually will have a "U" shaped contact in it and it likely will not come out the top of the socket.
Grab the whole header, and gently wiggle back and forth with a slight upward force. They usually will come off/ go back on quite easily.
4  Using Arduino / General Electronics / Re: pwm for 3w led driver not dimming on: May 10, 2012, 07:50:01 pm
I assume you are doing the same thing as I did for my LED aquarium lighting. I used the arduino to drive a set of 4 Meanwell Eln-60-48p pwm drivers.

Most LED drivers take a 10V pwm signal to power them, (the one's popular in the aquarium trade anyway) the arduino only outputs a 5V pwm signal and you will need a few components to ramp that up. It is a quite simple circuit, and I have schematics of mine, if you would like to see them see them send me an e-mail at

But for your problem when you are outputting a 0 to the pwm output on the arduino there should be a constant 0V, which would dim the drivers to 0 regardless of the signal level. I'd assume there is an issue with the code, wiring, or what pin you are using on your arduino.

Could you post your code?
5  Using Arduino / Installation & Troubleshooting / Re: Arduino Uno cannot upload on Arch Linux on: January 16, 2012, 07:13:31 pm
You might want to try blacklisting the xhci_hcd module.
There are instructions here
use the modprobe.conf method, you will have to reboot after you blacklist it.
6  Using Arduino / Installation & Troubleshooting / Re: Arduino Uno cannot upload on Arch Linux on: January 11, 2012, 10:00:52 pm
Yes mine works fine. It is part of the UUCP group too.
dmesg on connect:
[  232.556919] usb 1-1.5: new full speed USB device number 5 using ehci_hcd
[  232.643491] cdc_acm 1-1.5:1.0: ttyACM0: USB ACM device
So mine uses the ehci_hcd where yours tries to use the xhci_hcd for some reason.
my lsusb:
Bus 001 Device 006: ID 2341:0010
is the same as yours, it looks like it is trying to use a different module for the usb, probably due to you having a different chipset. There are several people that are having this problem also (google: arduino xhci_hcd).
It seems that the module shites itself after about 5-7 seconds for most people, which looks to be true in your case according to the timestamps from dmesg.

One person said this helped, adding rwx permissions to the lock directory (note on arch it is at /run/lock not /var/lock)

Upon further reading it seems to be an issue with all usb 3.0 devices and the xhci_hcd module. There is a patch in the works aparently and should come around sooner than later.

Until then what is the output of "lspci | grep USB" on your system
7  Using Arduino / Installation & Troubleshooting / Re: Arduino Uno cannot upload on Arch Linux on: January 11, 2012, 10:54:07 am
Oh, my bad I didn't see that there the first time I read it.

Are you a part of the tty group??
8  Using Arduino / Installation & Troubleshooting / Re: Arduino Uno cannot upload on Arch Linux on: January 10, 2012, 05:56:21 pm
I'm an arch linux user here myself.
To get my board (uno non-smd) working with linux I had to update the arduino firmware there is a known problem with linux and the old firmware.
I suggest you check there first and see if your board is one of the affected.
9  Using Arduino / Installation & Troubleshooting / Problem after Atmega8U2 update on UNO on: January 10, 2012, 05:16:40 pm
I am having a problem after I have updated the firmware on my Arduino Uno (non-smd).

I followed this guide to update the firmware on my UNO, because I was having problems talking to it from my linux machines. I have a non-smd version of the UNO, so I had to solder the 10K resistor to the underside of the UNO.

I didn't notice the problem until the power went out, the UNO is installed as a controller for my aquarium, mainly to control light levels via PWM LED drivers.

When the power is reset to the system, the arduino does not boot back up properly (the light's don't turn on). My code has a good bit of diagnostic output, so my next step is to fire up the serial monitor to find out what is going on... When I do this, the arduino resets as normal whenever you connect over serial, and it boots up normally (lights come on, normal serial i/o). This is making it quite difficult finding out why it is not booting properly.

Did anyone else experience anything like this? I designed this to easily recover and continute operation after a power failure (RTC, setable values saved in EEPROM, etc), and it not booting nullifies all that.

I should mention that I left the 10K resistor on the bottom side of the arduino, I could not find any information on if I should leave or remove it after the upgrade so it's still there.

I really don't think my code has anything to do with it, but if someone would like to prove me wrong you can find it here: I would appreciate it greatly.
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