Comments for Cerulean

Comment on k8055 control from php in Linux by Alexander

Alexander — Thu, 16 Jun 2011 14:01:18 +0000

This website was of great help to me: http://www.robert-arnold.de/cms/en/2010/10/zugriff-fur-nicht-root-user-auf-usb-board-k8055-unter-ubuntu-9-10-erlauben/

I could not (apparently because I have a newer kernel version) get usbfs working. I now have the device showing up in the terminal with “mount”

Comment on Arduino and Load cell by lijuan

lijuan — Wed, 15 Jun 2011 03:41:26 +0000

Hi Chrlilje,

Thank you for reply.
- I used 0-5kg load cell from digital scale. Is that an issue for the sensitive reading? what range load cell is the best choose?
- Where should i put the resistor to compensate the offset and what value i should choose for the resistor?
- If the circuit is working, is the same as normal digital scale?

Comment on Arduino and Load cell by lijuan

lijuan — Wed, 15 Jun 2011 02:20:53 +0000

Hi chrlilje,

- Thank you for reply. Because this is the first time i used load cell. I am not familiar with this part. How should i compensate the offset on my load cell. I got the load cell from digital scale, so i don’t have any datasheet about the load cell. Is your load cell have the same problem too?

- I measure the voltage coming out of the bridge when it is not loaded, the voltage is the same. If this circuit is working, is the load cell working same as the digital scale? is it give very precise value?

Thank you.

Comment on Arduino and Load cell by chrlilje

chrlilje — Tue, 14 Jun 2011 08:49:38 +0000

Hi lijuan
- You problem is probably that you have an offset on your load cell.
And you need to compensate for that.

Measure the voltage coming out of the bridge when it is not loaded.
- You should have the same voltage compared to ground on each of the two. – If not, you have to add a resistor to balance the voltage.

Comment on Arduino and Load cell by lijuan

lijuan — Tue, 14 Jun 2011 03:46:00 +0000

Hi,
I got some problems about this project. I got a load cell from digital scale, and i used arduino nano 3.0 to connect the circuit. I follow the circuit connected. But my circuit is not working so well. it is not sensitive at all. I didn’t use your program to test, i write a simple analogread program to test the analog read. I must use a lot of pressure, then i can get the value. it seems didn’t amplifier. So i really need some help. Please reply me as soon as possible. Thank you so much.

Comment on Arduino and Load cell by lalantha

lalantha — Fri, 06 May 2011 06:46:44 +0000

hi
i need to measure applied load of caster wheel tyre
100 kg- 350kg,
tyre is small so we have to use small strain gauge
dimension of strain gauge
length <15mm, width<8mm width<3mm . how I select stain gauge and how i buy

Comment on Spider zapper – Bug zapper by chrlilje

chrlilje — Sat, 30 Apr 2011 08:50:48 +0000

sorry, I don’t remember.
never came around to build the thing.

Comment on Spider zapper – Bug zapper by Chris Jones

Chris Jones — Sat, 30 Apr 2011 05:46:55 +0000

Hey, what is the AC voltage going into the circuit?

Comment on Arduino and Load cell by Another Use For Loadcells « mike estee

Another Use For Loadcells « mike estee — Sat, 30 Apr 2011 00:00:34 +0000

[...] searching around the web today I stumbled upon this great article by Christian Liljedahl about his adventures getting loadcells to work with the arduino. I [...]

Comment on k8055 control from php in Linux by Rick

Rick — Thu, 14 Apr 2011 05:12:13 +0000

Christian,

An old post, but thanks for the concise information! I just picked up the k8055 and you had the info I was looking for to get this working correctly in Linux.