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Re: Velocity measuring

 by skimask ¦  Fri Jul 02, 2010 11:09 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Velocity measuring ¦  Replies: 8 ¦  Views: 714

phalanx wrote:May I ask what kind of vehicle has no axles or wheels but is capable of navigating hilly terrain?
Serious question... I'm just curious because nothing is coming to mind.
-Bill
The Human Vehicle! :)

Re: Prototyping PCB ???s...gotta be a simple answer somewhere...

 by skimask ¦  Fri Jul 02, 2010 11:06 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Prototyping PCB ???s...gotta be a simple answer somewhere... ¦  Replies: 15 ¦  Views: 1663

With 8-bit PICs the 64 MHz is divided by four, so the relevant frequency is 16 MHz. The signal edges are nothing to do with the frequency, and depend on the switching characteristics of the transistors used in the device. And again, I agree 100%...normally. But...That bit of EMI you get while runni...

Re: Prototyping PCB ???s...gotta be a simple answer somewhere...

 by skimask ¦  Fri Jul 02, 2010 4:36 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Prototyping PCB ???s...gotta be a simple answer somewhere... ¦  Replies: 15 ¦  Views: 1663

@leon - Normally I'd agree 100%. This particular project won't have much in the way of multiple signals per 'bus' on any of the PICs. Shouldn't have to worry about it much. At least I've got a 'scope so I can take a look at the lines and see if anything funny is going on. @esklar81 - I tried wire-wr...

Re: Prototyping PCB ???s...gotta be a simple answer somewhere...

 by skimask ¦  Fri Jul 02, 2010 6:24 am ¦  Forum: SparkFun Product Questions ¦  Topic: Prototyping PCB ???s...gotta be a simple answer somewhere... ¦  Replies: 15 ¦  Views: 1663

Ok, thanks for the link. I found the 'lost' board that I've got a bunch of. Turns out it was the "Vectorbord CircBord 3677-6". Looks like they run $22+ each nowadays. Can't believe I paid that much for this pile of boards...although they have lasted me for 10+ years. So...with the 30ga wire...You're...

Prototyping PCB ???s...gotta be a simple answer somewhere...

 by skimask ¦  Thu Jul 01, 2010 11:43 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Prototyping PCB ???s...gotta be a simple answer somewhere... ¦  Replies: 15 ¦  Views: 1663

When I started, I used those solderless breadboards for building stuff. Works great until you try to run a PIC or whatever at multi-Mhz...then they hit a wall... I switched over to using something like this: http://www.protostack.com/index.php?main_page=product_info&cPath=1_2&products_id=1&zenid=mbc...

Re: Storing generated power to light Luxeon I & III?

 by skimask ¦  Sun Jun 27, 2010 10:46 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Storing generated power to light Luxeon I & III? ¦  Replies: 6 ¦  Views: 663

What is your generator capable of producing under normal 'biking' conditions? No regulator, no nothing, except the diodes of course, and a couple of fairly high value caps to smooth everything out? If it was me, I'd design the circuit as a sort of series power circuit. The generator powers the batte...

Re: Audio Analyzer and EL Wire Project

 by skimask ¦  Sat Jun 26, 2010 10:48 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Audio Analyzer and EL Wire Project ¦  Replies: 15 ¦  Views: 2620

My two big questions would be: 2. What kind of algorithm would I have to implement on the arduino? I am sure that there are popular ones out there for audio analysis. FFT or DFT. http://en.wikipedia.org/wiki/Fast_Fourier_transform http://en.wikipedia.org/wiki/Discrete_Fourier_transform The math isn...

Re: Storing generated power to light Luxeon I & III?

 by skimask ¦  Sat Jun 26, 2010 10:43 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Storing generated power to light Luxeon I & III? ¦  Replies: 6 ¦  Views: 663

Four 1 Farad capacitors currently provide me with a little under a second of quickly fading light. They work perfect for smoothing the current during steady riding. But it seems capacitors release their charge in decreasing voltage. Is there any way to steady their output at a constant rate? 1 Fara...

Re: Handheld Console Project

 by skimask ¦  Wed Jun 23, 2010 9:34 pm ¦  Forum: SparkFun Product Questions ¦  Topic: Handheld Console Project ¦  Replies: 6 ¦  Views: 757

--> Should I use this screen ? Im fairly sure it'l fit my needs but have never used a LCD before. anyone have any experiences with it? Thanks alot! I've got that screen running on my scanner thing. http://www.youtube.com/watch?v=7sUVMn4OJ58 Check that video plus the other 4 if you want to see the L...

Re: GPS Speedometer

 by skimask ¦  Wed Jun 23, 2010 8:46 pm ¦  Forum: GPS ¦  Topic: GPS Speedometer ¦  Replies: 10 ¦  Views: 6669

Buy one of those big ol' 4 inch tachometers, pull the front face and needle off, make your own front face, put it all back together and mount it IN the dash panel. Then drive the ignition input with 12v pulses which vary in accordance to your speed and controlled with an MCU of some sort. http://www...

 by skimask ¦  Tue Feb 23, 2010 7:05 pm ¦  Forum: Wireless/RF ¦  Topic: How do I...? real time data display over the internet ¦  Replies: 16 ¦  Views: 2263

This is where I got the idea/method/question... http://www.youtube.com/watch?v=LjM5eeBeVv4&feature=related (skip ahead to about the 4:30 mark and watch how quickly the tach updates on the iPhone) I assume this is a fast wifi connection because it's a dedicated AdHoc connection which has nothing else...

How do I...? real time data display over the internet

 by skimask ¦  Sun Feb 21, 2010 10:52 pm ¦  Forum: Wireless/RF ¦  Topic: How do I...? real time data display over the internet ¦  Replies: 16 ¦  Views: 2263

Trying to figure out how to display data on a webpage in 'real time'... Either I don't know what the method is called, or I just plain don't know how to do it... Here's the scoop... I've got some accelerometers connected to a PIC and a NanoWiReach Wifi module. The accelerometers measure tilt and suc...

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