Search found 177 matches

by signal7
Tue Nov 16, 2010 9:42 am
Forum: SparkFun Site Questions/Comments
Topic: Post your SparkFun.com bugs and issues here!
Replies: 99
Views: 14488

Re: Post your SparkFun.com bugs and issues here!

Don't know if you've noticed, but the RSS feed for Sparkfun news appears to be repeating the same article again and again in Google reader. I've now seen the announcement leading to this forum post at least 3 times, along with the AVR treasure chest, etc.

Thanks - great work on the site, too.
by signal7
Tue Jul 21, 2009 5:07 am
Forum: SparkFun Product Questions
Topic: SNES controller ports? Where are they???
Replies: 4
Views: 1087

They might be custom manufactured. If you watch the parts procurement class, towards the end they talk about custom parts procurement. Apparently it's very common. For example, it's very difficult to buy a 3 inch usb extension, but there are products that ship with them. If the quantity needed is la...
by signal7
Tue Jul 21, 2009 5:01 am
Forum: SparkFun Product Questions
Topic: How to catch a bike theif?
Replies: 18
Views: 4642

Krogoth wrote: The easiest solution, period, would be to invest in a bike lock? :P
Yeah - so long as you don't have one of those locks that can be opened with a Bic pen.... or a combination lock with only 3 numbers ranging from 0 to 9. Both of them will only give you a false sense of security.
by signal7
Tue Jul 21, 2009 4:56 am
Forum: SparkFun Product Questions
Topic: Stepper motor sweetness...>>>!!!!>>>!!!!!
Replies: 5
Views: 3219

I know you mentioned you're aware that subroutines would be better. I would add that subroutines are better because they make the design process easier and the resulting code would be much easier to read/understand. It's good that you commented the code, but ... subroutines would help a lot. :)
by signal7
Tue Jul 21, 2009 4:46 am
Forum: SparkFun Site Questions/Comments
Topic: AVR Stick not working
Replies: 8
Views: 3469

By 'AVR stick' are you referring to the AT90USB demo kit? Can you post more details of which product you're using?
by signal7
Tue Jul 21, 2009 4:40 am
Forum: SparkFun Site Questions/Comments
Topic: Wall adapter for Arduino USB
Replies: 3
Views: 1038

It may depend on what version of the board you have, but I typically use a 9 or 12 volt supply. The on-board voltage regulator needs a higher input voltage than the actual microcontroller does to operate properly. I only use the 5VDC adapter when I'm working on a design that lacks a voltage regulato...
by signal7
Tue Jul 21, 2009 4:32 am
Forum: BatchPCB
Topic: Have I been waiting unusually long for my order
Replies: 15
Views: 6604

I'll assume for a moment that you don't work for the company that produces LPKF Plotters. The question that you raise is how many boards could I order from an external source with the money that would be required to purchase the LPKF plotter? For the average hobbyist which frequents these forums, th...
by signal7
Tue Jul 21, 2009 4:22 am
Forum: PCB Design Questions
Topic: Lipower "B" and "C" terminals
Replies: 6
Views: 1300

I assume you're talking about the lillypad version of the LiPoly charger. Unfortunately, the schematic and the board markings don't seem to match up... or at least I don't see a correlation. You'll have to take a close look at the wiring on the board (probably with a multimeter) to figure out exactl...
by signal7
Tue Jul 21, 2009 3:56 am
Forum: AVR Microcontrollers
Topic: Cable length limitation with ADC
Replies: 5
Views: 1386

To flesh out Leon's curt response, you can actually make the cable as long as you would like, but you will need to put a low pass filter on it near the microcontroller. As Leon said, you'll have a problem picking up noise and at the same time you'll want to pay attention to the nyquist frequency lim...
by signal7
Fri Jul 10, 2009 4:40 am
Forum: SparkFun Product Questions
Topic: Help with Bluetooth Door Lock
Replies: 2
Views: 1438

In any serial communication, garbage generally indicates a baud rate mis-match. The blueSmirf modules don't automatically detect what baud rate is being used, so it has to be set to a specific value. If your mcu is communicating at 9600 and the blueSmirf is still at the default 38400 it would explai...
by signal7
Fri Jul 10, 2009 4:24 am
Forum: SparkFun Site Questions/Comments
Topic: Arduino and Servo
Replies: 9
Views: 2599

PWM is commonly used for LED fading: http://arduino.cc/en/Tutorial/Fading Some minor modifications to that example should get you going - or - at the very least, the example sketch should give you some ideas of how to adapt your example to using analogWrite() instead of the servo library. At the lea...
by signal7
Fri Jul 10, 2009 4:13 am
Forum: PCB Design Questions
Topic: MAX1555 Schematic
Replies: 4
Views: 2559

Looks right to me. Please don't take it as a stupid question, but is it possible your battery is already fully charged? Otherwise, I'm not sure why it wouldn't work.
by signal7
Fri Jul 10, 2009 4:00 am
Forum: AVR Microcontrollers
Topic: Arduino vs Encoder Ke-204
Replies: 1
Views: 804

Without an internal schematic of the device, it's hard to say if you need to use resistors or not. If there are current limiting resistors on the diodes in the device, then you probably don't need them. As for GND, Vcc doesn't do a much work without it - so yes, you'll need to hook up GND to the cir...
by signal7
Wed Jul 08, 2009 5:04 am
Forum: SparkFun Product Questions
Topic: All-Hardware USB Password Manager
Replies: 20
Views: 3924

One thought: would it be possible to use software to select which password is to be entered? The reason I bring it up is because moving parts tend to be the weakest portion of any electronics product and software control would make it less prone to breakage by the end user. Of course, if that limits...
by signal7
Wed Jul 08, 2009 4:56 am
Forum: SparkFun Site Questions/Comments
Topic: Arduino and Servo
Replies: 9
Views: 2599

If it's not a power related issue, I would guess that the servo isn't getting a changing PWM signal. An oscilloscope, if you have one available, would show if the Arduino is doing the right thing or if you have a defective servo. I haven't done it with an Arduino, but you might try manipulating the ...