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Re: FLIR Lepton - Low Cost Thermal Imaging Sensor

 by mikeselectricstuff ¦  Tue Sep 09, 2014 3:23 pm ¦  Forum: New Product Ideas ¦  Topic: FLIR Lepton - Low Cost Thermal Imaging Sensor ¦  Replies: 6 ¦  Views: 4766

Re: IAR compiler -> no hex file???

 by mikeselectricstuff ¦  Tue Dec 07, 2010 11:17 am ¦  Forum: Everything ARM and LPC ¦  Topic: IAR compiler -> no hex file??? ¦  Replies: 15 ¦  Views: 16103

The confusion may arise from the fact that answer depends on which version of IAR you are using. V.4x will produce a hex file if you specify in the linker options (linker-> extra output -> generate extra output file -> Intel-Extended). I have a feeling you may also need to override the default filen...

Re: Torrid time with syringes & solder paste.

 by mikeselectricstuff ¦  Sun Aug 01, 2010 3:52 pm ¦  Forum: PCB Design Questions ¦  Topic: Torrid time with syringes & solder paste. ¦  Replies: 7 ¦  Views: 1414

Different brands of paste seem to have wildly different shelf lives, I've found that EFD Solderplus last for years, others dry up in a coupel of months. With stuff that comes in syringes I suspect it also depends how good the rear seal is at keeping air out. I use stainless dispensing needles - thes...

Re: Simple "Shake" Sensor?

 by mikeselectricstuff ¦  Sat Jul 17, 2010 4:27 pm ¦  Forum: New Product Ideas ¦  Topic: Simple "Shake" Sensor? ¦  Replies: 5 ¦  Views: 2191

How low cost? Accelerometers are pretty cheap nowadays.
A piezo element with a weight on is another possible.

Re: strobing an Incandescent lightbulb

 by mikeselectricstuff ¦  Sun Jul 11, 2010 1:28 am ¦  Forum: SparkFun Product Questions ¦  Topic: strobing an Incandescent lightbulb ¦  Replies: 5 ¦  Views: 888

Ramp-up time will be faster, input current surges lower and lifetime much longer if you 'simmer' the lamp when 'off' - run it a low power just below where it emits significant visible light. This is a common facility on stage lighting dimmers. If using an SSR, all you need is a mains frequency refer...

Re: PSP LCD /ADXL345 Questions

 by mikeselectricstuff ¦  Mon May 31, 2010 3:16 am ¦  Forum: SparkFun Product Questions ¦  Topic: PSP LCD /ADXL345 Questions ¦  Replies: 5 ¦  Views: 1449

You really do need the backlight to see anything - generating it isn't exactly rocket science...
I wouldn't worry too much about the sequencing.


 by mikeselectricstuff ¦  Tue Mar 30, 2010 4:01 pm ¦  Forum: SparkFun Product Questions ¦  Topic: COLOR NOKIA E51 LCD IS FINALLY HACKED 240x320 Pixels ¦  Replies: 10 ¦  Views: 14948

Why waste time and money figuring out the interface for an unknown screen instead of just buying a known one with a datasheet? Because the 'unknown' ones used in high-volume consumer electronics are often available a lot cheaper and easier to get hold of as spares than ones that come with datasheet...

Re: FT2232 Breakout

 by mikeselectricstuff ¦  Thu Mar 11, 2010 3:24 pm ¦  Forum: New Product Ideas ¦  Topic: FT2232 Breakout ¦  Replies: 3 ¦  Views: 3384

FTDI already do DIP modules for most of their parts

 by mikeselectricstuff ¦  Fri Jan 29, 2010 4:05 pm ¦  Forum: New Product Ideas ¦  Topic: Is the Toshiba camera IR sensitive ? ¦  Replies: 3 ¦  Views: 977

er, exactly do you filter IR in software....?

There are some sensors/modules with the IR filter either on the chip or as a coating on a lens element, so not practical to remove.

 by mikeselectricstuff ¦  Tue Dec 22, 2009 4:41 pm ¦  Forum: Wireless/RF ¦  Topic: Bluetooth - pricing confusion ¦  Replies: 7 ¦  Views: 1587

If you're doing a 10-100K run you probably shouldn't be buying BT modules from Digikey & Mouser, or using them as a price gide. A specialist distributor can probably find something a lot cheaper for these volumes. Not sure you'll hit $5 though.

 by mikeselectricstuff ¦  Tue Dec 22, 2009 4:37 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Diffusing LEDs ¦  Replies: 11 ¦  Views: 2459

I've done a lot of experimenting with diffuser materials for this project amongst others. The thing that really works well is a plastic material with 'milkiness' distributed throughout its thickness, not just a surface finish, but not so dense that you lose lots of light. Polythene ( the sort of thi...

 by mikeselectricstuff ¦  Tue Dec 15, 2009 4:58 pm ¦  Forum: GPS ¦  Topic: Venus GPS - encapsulated in epoxy.... ¦  Replies: 23 ¦  Views: 7997

It won't just be the antanna that's the problem - Encapsulating any sort of RF device is a really bad idea. Even UHF tx/rx modules don't like it. The encasulant's dielectric properties mean that things like the stray capacitance of tracks and between coil windings will be different from their carefu...

 by mikeselectricstuff ¦  Tue Dec 15, 2009 2:58 am ¦  Forum: SparkFun Product Questions ¦  Topic: Faster PWM generators - anyone with experience? ¦  Replies: 7 ¦  Views: 1430

You can get higher frequencies at lower resolution, which is still generally adequate for PSU applications. If necessary you can also use cycle-to-cycle 'jitter' to increase the effective resolution at lower resolutions.
Read the AVR datasheet for details.

heads-up for UK people : GBP20 GPS unit with serial out

 by mikeselectricstuff ¦  Wed Dec 09, 2009 10:44 am ¦  Forum: GPS ¦  Topic: heads-up for UK people : GBP20 GPS unit with serial out ¦  Replies: 0 ¦  Views: 506

GPS Director GD-101 - £20 at Maplin until 24th Dec- serial data connection info here on my site

 by mikeselectricstuff ¦  Tue Sep 29, 2009 4:46 pm ¦  Forum: Everything ARM and LPC ¦  Topic: Can’t seem to program a target with J-Link ¦  Replies: 4 ¦  Views: 1568

Check that you have the correct pllup/down ( can't remember which offhand -check the on-chip debug section of the UM) on the RTCK pin ( J-link doesn't use it but the MCU uses it to enable debug functions, and I think it can do flaky things if left floating. Also check you have the latest J-Link driv...