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What type of voltage division?
Kartman - that's a cool site. An Amazing amount of work there in reverse-engineering the boxes back to schematics. Not to mention the code.
Wednesday, 10 January 2007 - 18:31
buffering analog input
Ossi: Yup - Vcc is key here. Power input to the whole device is heavily filtered. You can see the schematic of the power input section HERE. Kartman: Point taken on the TVS. I...
Wednesday, 10 January 2007 - 14:54
buffering analog input
Doh. My Bad. I just realized I posted an old schematic portion with an error - it was a PNG capture I had done ages ago. The GainB resistor doesn't go to GND, it goes to Vcc (...
Tuesday, 9 January 2007 - 21:14
buffering analog input
Take a look at the Linear LT1991 series of opamps. They have built-in precision resistors, and you can set the gain just by pinning the inputs in various ways. They have a nice...
Tuesday, 9 January 2007 - 16:19
DIY OBD-II for alfa156
x_eleman - Posting two identical messages one after another, and with such a profound lack of detail will do nothing but get you ignored. What is hex_can protocol ? What circuit...
Tuesday, 9 January 2007 - 15:06
Neat project I was asked to do
A couple of years ago I did a similar project to the Sparkfun one, though nowhere nearly as large or as cool. Rather than lightbars, I used individual high-brightness LEDs,...
Tuesday, 9 January 2007 - 04:34
Corrupt filesystem on my AT90USBKey
I'd be a little more worried as to why the data was corrupted ... I can think of several reasons, none of them good. 1) Bollixed up transfer of data to drive - programming side....
Friday, 5 January 2007 - 20:24
Implementing UI on an LCD - lost in translation
Have a look at the source for the AVR Butterfly. They do a very nice implementation of a state-machine driven interface. Umm, finding said source is an exercise left to the...
Friday, 29 December 2006 - 20:06
STK500X
I must say I really like the look of the Circuit-ED boards. They have everything on them, including the kitchen sink. USB, Char LCD, graphics LCD, SD/MMC, CF card, RS232, RS485...
Tuesday, 26 December 2006 - 17:23
In car use of the AVR
Look at the RBO-40. I've used them before and they work well. A rock solid combination is a couple of inductors for both +12V and GND, then the RBO-40, then a couple of ferrite...
Tuesday, 19 December 2006 - 03:48
build my own LCD matrix
Those Sparkfun boards are really nice. But boy are they expensive ... You could probably do it a lot cheaper doing it yourself. For example, Ebay item 230064013165 Looks really...
Sunday, 17 December 2006 - 02:02
STK500X
Buy a Dragon and get a free STK500 ... Look at the Webinar thread in the Off-Topic forum for details.
Friday, 15 December 2006 - 19:24

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