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Re: affordable RF hacking

 by tones ¦  Thu Nov 17, 2011 11:24 am ¦  Forum: Wireless/RF ¦  Topic: affordable RF hacking ¦  Replies: 5 ¦  Views: 1045

That's useful. I see a few Arduino libraries have been written for the nRF24L01+, so trying to get those running with a few Sparkfun breakouts might be a good place to start. Then I could eventually work up to building a custom nRF24L01+ circuit with a cheaper microcontroller and a direct connection...

affordable RF hacking

 by tones ¦  Wed Nov 16, 2011 11:44 pm ¦  Forum: Wireless/RF ¦  Topic: affordable RF hacking ¦  Replies: 5 ¦  Views: 1045

I've done a lot of Arduino projects but have never worked with RF before. I'm just starting to learn and am trying to figure out what kinds of parts to get. Most of what's been written recently seems to focus on the XBee/ZigBee world. This looks both fantastically powerful and basically unaffordable...

Re: hacking a .05" pitch component into a .1" pitch breadboard?

 by tones ¦  Tue Sep 06, 2011 9:37 am ¦  Forum: SparkFun Product Questions ¦  Topic: hacking a .05" pitch component into a .1" pitch breadboard? ¦  Replies: 7 ¦  Views: 2784

Instead of using a 2x3 connector, I was thinking I'd just strip the ribbon cables and insert them into the breadboard individually.

Good news though -- I contacted Bourns and they offered to send me a few free samples of their prototyping connector cables. So, problem solved.

Re: hacking a .05" pitch component into a .1" pitch breadboard?

 by tones ¦  Mon Sep 05, 2011 2:58 pm ¦  Forum: SparkFun Product Questions ¦  Topic: hacking a .05" pitch component into a .1" pitch breadboard? ¦  Replies: 7 ¦  Views: 2784

Good idea. I was hoping not to damage the component in the process. But I guess the ribbon cable can be desoldered later.

Re: hacking a .05" pitch component into a .1" pitch breadboard?

 by tones ¦  Mon Sep 05, 2011 9:19 am ¦  Forum: SparkFun Product Questions ¦  Topic: hacking a .05" pitch component into a .1" pitch breadboard? ¦  Replies: 7 ¦  Views: 2784

Thanks for the reply!

Bourns.com was down earlier today, but appears to be back online now. The datasheet is here:
http://www.bourns.com/pdfs/em14.pdf

Unfortunately the pins are quite short, only .048" (1.22mm). So I don't think it's possible to bend them in the way you suggest.

hacking a .05" pitch component into a .1" pitch breadboard?

 by tones ¦  Mon Sep 05, 2011 7:17 am ¦  Forum: SparkFun Product Questions ¦  Topic: hacking a .05" pitch component into a .1" pitch breadboard? ¦  Replies: 7 ¦  Views: 2784

I've recently purchased a Bourns EM14 rotary encoder to play with: http://goo.gl/1PpR5 The 6 pins are spaced at .05", instead of the .1" that I'm used to. Consequently, the component won't fit into any of my breadboards or interconnects. I'm trying to figure out the best way to jack this component i...

Re: 7219 LED Driver + Darlingtons ??

 by tones ¦  Wed Mar 23, 2011 10:34 pm ¦  Forum: SparkFun Product Questions ¦  Topic: 7219 LED Driver + Darlingtons ?? ¦  Replies: 2 ¦  Views: 376

Placed inverters on the Darlington inputs and things began running smoothly.

Re: Eagle: Moving many parts without "cant perform" error

 by tones ¦  Mon Mar 21, 2011 12:39 pm ¦  Forum: PCB Design Questions ¦  Topic: Eagle: Moving many parts without "cant perform" error ¦  Replies: 5 ¦  Views: 2661

"Zoom to fit"! Brilliant.

Re: 7219 LED Driver + Darlingtons ??

 by tones ¦  Sun Mar 20, 2011 3:52 pm ¦  Forum: SparkFun Product Questions ¦  Topic: 7219 LED Driver + Darlingtons ?? ¦  Replies: 2 ¦  Views: 376

OK OK I posted too soon. I've figured out basic ULN 2803 operation. It's sending my LEDs garbage though. I'm guessing that's either because it's too slow to multiplex, or because of the signal-inversion issue I've seen mentioned elsewhere. (Apparently the 7219 activates a DIG by setting it low, wher...

7219 LED Driver + Darlingtons ??

 by tones ¦  Sun Mar 20, 2011 2:45 pm ¦  Forum: SparkFun Product Questions ¦  Topic: 7219 LED Driver + Darlingtons ?? ¦  Replies: 2 ¦  Views: 376

So. I've got a nice circuit designed with an Arduino controlling a Maxim 7219 LED driver, which in turn is multiplex-controlling 64 LED clusters. But! My LED clusters are going to draw more current than the 7219 can provide. So I think I need to use the 7219 to drive some sort of transistor array ca...

Re: Eagle: Moving many parts without "cant perform" error

 by tones ¦  Sat Mar 19, 2011 4:28 pm ¦  Forum: PCB Design Questions ¦  Topic: Eagle: Moving many parts without "cant perform" error ¦  Replies: 5 ¦  Views: 2661

Ok I'll try to find a three-button mouse.

You're right, I was just moving them out of bounds. Looks like I need to pay attention to whether my grid is set to inches or mm too.

Thanks!

Eagle: Moving many parts without "cant perform" error

 by tones ¦  Sat Mar 19, 2011 3:40 pm ¦  Forum: PCB Design Questions ¦  Topic: Eagle: Moving many parts without "cant perform" error ¦  Replies: 5 ¦  Views: 2661

I'm designing a board in Eagle to help with an Arduinome-like device -- 64 button/light components which need to be connected for col/row led/button multiplexing. My schematic is finished, with nets to make sure all the right bits connect up. But I'm running into a big roadblock when designing the b...

nm

 by tones ¦  Sat Dec 05, 2009 8:48 pm ¦  Forum: SparkFun Product Questions ¦  Topic: nm ¦  Replies: 4 ¦  Views: 480

aaha! the answer is: soldering.

connectors / crimp pins

 by tones ¦  Sat Dec 05, 2009 8:26 pm ¦  Forum: SparkFun Product Questions ¦  Topic: connectors / crimp pins ¦  Replies: 3 ¦  Views: 459

Hey, I've got some of the Sparkfun polarized connectors -- headers, housings and crimp pins. I'm not sure how to correctly crimp and install the pins though. Can anyone point me to some help with this?

=T=