Search found 296 matches

by SOI_Sentinel
Wed Oct 19, 2011 9:29 pm
Forum: Arduino
Topic: Checking bootloader on a Fio
Replies: 0
Views: 326

Checking bootloader on a Fio

I got a Fio plus Xbee shields for wireless bootloading with my free day funds, and was planning to use it (finally) for a Halloween project. I followed the wireless tutorial to the letter but could not get a connection to work. I have verified that the Xbee boards work in loopback, so i began to que...
by SOI_Sentinel
Tue Apr 19, 2011 10:13 am
Forum: Arduino
Topic: Arduino Fio Bootloader check?
Replies: 0
Views: 637

Arduino Fio Bootloader check?

Hi, I'm trying to get a FIO to bootload over V1 XBee modules. I've looped back the serial signal from the TX/RX pins temporarily to test, and I do get the serial stream back strongly. I have checked the Sparkfun, Adafruit, and Arduino versions of the wireless bootloading instructions, and they check...
by SOI_Sentinel
Mon Apr 18, 2011 9:20 pm
Forum: New Product Ideas
Topic: Low Resolution Thermopile based cameras
Replies: 1
Views: 2459

Low Resolution Thermopile based cameras

I was looking into thermal vision cameras (single point servoed and 1x8 arrays) and ran across these guys: http://www.heimannsensor.com/products_imaging.php They make analog/SPI thermopile image sensors. The 8x8 gives 70fps, the 32x31 does 18fps. Cost in reasonable (to stock) quantities starts aroun...
by SOI_Sentinel
Tue Apr 12, 2011 3:13 pm
Forum: SparkFun Product Questions
Topic: Future Embedded Camera Questions
Replies: 2
Views: 360

Re: Future Embedded Camera Questions

Depends. The originally went for about $20 from Digikey. I found a surplus sales guy in Ireland via Ebay (I'm in the US, so "one or two chips" is not exactly cheap) who had put up a lot of 28 in their storage tray for 49 euro plus 8 euro shipping. I don't know what his current pricing is, but he tol...
by SOI_Sentinel
Tue Apr 12, 2011 9:07 am
Forum: SparkFun Product Questions
Topic: Future Embedded Camera Questions
Replies: 2
Views: 360

Future Embedded Camera Questions

Hi, I was at one time working on schematics for an embedded Kodak KAC 9630 126x96 monochrome pixel imager to interface to most (if not all) microcontrollers. Unfortunately, they discontinued that part a while ago now. I liked it for several reasons: 8 bit data bus up to 10MHz clock up to 580fps up t...
by SOI_Sentinel
Wed Apr 06, 2011 7:43 am
Forum: SparkFun Product Questions
Topic: HelP; Pulse power via supercap and coin cell.
Replies: 4
Views: 528

Re: HelP; Pulse power via supercap and coin cell.

It's been a few days, so time for an update: Coin cell on/off switch: I might be able to do something like this AC switch, but without having a 3mA drain from a (rather interesting) opto isolator: http://www.irf.com/technical-info/appnotes/an-1017.pdf I also found some useful, simple notes on using ...
by SOI_Sentinel
Mon Apr 04, 2011 10:38 am
Forum: SparkFun Product Questions
Topic: HelP; Pulse power via supercap and coin cell.
Replies: 4
Views: 528

Re: HelP; Pulse power via supercap and coin cell.

Yeah, that's what I was afraid of. Most coin cell type supercaps I've seen have an ESR of 30 ohms, so they would be problematic. Everything up through startup the coin cell can handle without support. Basing the PIC off a PIC24F32KA301. Idle long term(let's say 10s cycles): radio: 0.5uA worst case, ...
by SOI_Sentinel
Sun Apr 03, 2011 5:38 pm
Forum: SparkFun Product Questions
Topic: HelP; Pulse power via supercap and coin cell.
Replies: 4
Views: 528

HelP; Pulse power via supercap and coin cell.

Working on a little project with a PIC24 XLP, accelerometer, and an RM22 radio. Now, I'd LIKE to let it packet transmit at full power, but run it off a coin cell. Under unused conditions, the battery would be disconnected. By applying a 3V voltage between A and B, this would charge the supercap. Onc...
by SOI_Sentinel
Fri Sep 18, 2009 8:03 am
Forum: SparkFun Product Questions
Topic: Scanning Laser
Replies: 0
Views: 460

Scanning Laser

I've got a friend who works with a Romer arm and a Sharkscan laser scanner. Nice equipment. Made me think if I could duplicate part of it. I know camera systems are fairly simple these days, but I don't know if they can achieve the same accuracy. What I was thinking of doing was using the mirror and...
by SOI_Sentinel
Tue Sep 15, 2009 8:37 am
Forum: SparkFun Product Questions
Topic: Thought Experiment: Optical rangefinder
Replies: 15
Views: 4334

Wasn't expecting this thread to actually be dredged up, but the other thread is more for nuts and bolts while this was a theoretical discussion. manton: I think we were doing a return energy calculation. Assuming we could gather finite energy, the return would be 1/r^4. Now, "some" APD's can detect ...
by SOI_Sentinel
Mon Sep 14, 2009 11:01 pm
Forum: SparkFun Product Questions
Topic: Rangefinder parts
Replies: 0
Views: 460

Rangefinder parts

Ages and ages ago I had an ongoing discussion here about doing a laser rangefinder. I haven't had time to revisit it, but I decided to do some digging now that I'm older and wiser. Original discussion here: http://forum.sparkfun.com/viewtopic.php?t=4147 I've got schematics for an old TI optical phas...
by SOI_Sentinel
Thu Dec 13, 2007 8:37 pm
Forum: SparkFun Product Questions
Topic: Trying to understand how Laser Range Finders work
Replies: 163
Views: 60630

Interesting schematic. I actually bought an old TI Optoelectronics book a while ago because it has an IR LED/photodiode phase based discrete rangefinder schematic from a camera. I'll have to dig it up again.
by SOI_Sentinel
Wed Dec 12, 2007 5:00 pm
Forum: SparkFun Product Questions
Topic: Newbie help on selecting a PIC
Replies: 15
Views: 3835

Hmmm... I think they're thinking of the Lantronix XPORT as the ready to go solution. 10/100 ethernet in serial out (with a LITTLE configuration) in a DIP format, including ethernet jack. The Wiznet part also works, but you have to get a dev board or be willing to solder TQFP parts. Back to PICs. Mic...
by SOI_Sentinel
Mon Dec 10, 2007 4:44 pm
Forum: SparkFun Product Questions
Topic: Trying to understand how Laser Range Finders work
Replies: 163
Views: 60630

Better eye than me. Hmmm... other ideas will have to draw me back to the drawing board then.
by SOI_Sentinel
Sun Dec 09, 2007 7:55 pm
Forum: SparkFun Product Questions
Topic: Looking for cheap programmable PLC thing
Replies: 6
Views: 1941

And industrial hardware also requires software to program. The DL105 is NOT a free SW environment IIRC.

Given he's into electronics, I'd consider an Arduino and a Protoshield. Then he can build his own interface electronics.