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 by riden ¦  Thu Dec 01, 2005 3:01 pm ¦  Forum: SparkFun Site Questions/Comments ¦  Topic: Poll : Shipping for Intl and US customers ¦  Replies: 18 ¦  Views: 9812

As a U.S. customer living near Chicago, USPS priority packages almost ALWAYS arrive before UPS ground and the cost is cheaper. Another advantage is that I can get my package on Saturday.

Other's mileage may vary, but I definately would want a USPS option for my orders.

 by riden ¦  Fri Oct 28, 2005 8:19 am ¦  Forum: New Product Ideas ¦  Topic: Offering PICs with bootloaders already programmed ¦  Replies: 2 ¦  Views: 1827

Check the pic section, the 16F88 has the option of having the bootloader burnt in. Thanks for the pointing this out. The thought did cross my mind when I posting my previous message that maybe, somewhere on the site, I could order a PIC with the bootloader on it. I will say, in my defense, that I m...

 by riden ¦  Fri Oct 28, 2005 8:08 am ¦  Forum: SparkFun Product Questions ¦  Topic: my projects ¦  Replies: 7 ¦  Views: 4769

my goal is to build a 25MHz generator to beat my 12MHz wavetek but then to extend that design to use some of the monster 100MHz+ DDS engines from AD and see if I can get above the 50MHz range. I don't really have the background to deal with the RF issues involved in outputting clean signals at 100M...

Offering PICs with bootloaders already programmed

 by riden ¦  Thu Oct 27, 2005 8:11 pm ¦  Forum: New Product Ideas ¦  Topic: Offering PICs with bootloaders already programmed ¦  Replies: 2 ¦  Views: 1827

It would be nice if SparkFun would offer PICs with the Screamer boot loader already programmed into it. That way, a customer can download the Screamer PC client and be able to download their programs into the PIC without having to have a PIC programmer. I know it would be a hassle to have to deal wi...

 by riden ¦  Thu Oct 27, 2005 7:57 pm ¦  Forum: SparkFun Product Questions ¦  Topic: digital chess/scrabble clock ¦  Replies: 1 ¦  Views: 2046

I don't think using a PIC or other microcontroller for this project is an overkill by any means. You could built a timer using discrete components (digital counters and LED display instead of LCD) but the wiring using a PIC and LCD will be drastically simpler and use far less components. If you don'...

 by riden ¦  Thu Oct 27, 2005 7:42 pm ¦  Forum: New Product Ideas ¦  Topic: Graphical LCD Carrier Board back light inverter chip? ¦  Replies: 7 ¦  Views: 3513

It does the job quite nicely. Just remember that the version having the built in inductor is a QFN package. I glued my chip upside down to the back of the LCD and carefully soldered the connections dead-bug style. Better fabricators than I would have designed a PC board and properly attached the dev...

Function generator

 by riden ¦  Thu Oct 27, 2005 7:36 pm ¦  Forum: SparkFun Product Questions ¦  Topic: my projects ¦  Replies: 7 ¦  Views: 4769

I'll be watching with interest your progress on the function generator project! What is the maximum frequency that you would like to generate? I've built a couple of function generators using software only synthesis. My top range using a PIC was about 65KHz and over 200KHz using a low end AVR chip. ...

 by riden ¦  Thu Oct 27, 2005 12:59 pm ¦  Forum: New Product Ideas ¦  Topic: Graphical LCD Carrier Board back light inverter chip? ¦  Replies: 7 ¦  Views: 3513

If you are looking for an inverter to drive an EL panel, I've used the Durel 355B device. The QFN package requires ZERO external componets as it has the inductor built into the tiny package.

http://www.rogerscorporation.com/durel/ ... 052A03.pdf

 by riden ¦  Tue Aug 30, 2005 6:48 am ¦  Forum: SparkFun Product Questions ¦  Topic: Water level detection ¦  Replies: 9 ¦  Views: 6623

I can think of a few factors that could influence the approach taken. 1) Is it permissible to have a sensor come in contact with the liquid whose level you're measuring? If you're measuring water levels in a lake, for instance, it would okay to insert a sensor in the liquid. However, in a food proce...

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