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1  Community / Workshops and Events / FM Transmitter Hacking Workshop in Brooklyn, Feb. 21 on: February 09, 2011, 02:28:19 pm
I'm very pleased to announce a fun workshop at the Dumbo Arts Center in a few weeks.

Come and get on the air!

http://www.dumboartscenter.org/Education.html

and www.exitrip.org for more info about the project.


2  Forum 2005-2010 (read only) / Syntax & Programs / Re: nop questions... on: May 30, 2008, 06:46:29 pm
thanks!

I hadnt even made it through half the datasheet!!!!
3  Forum 2005-2010 (read only) / Syntax & Programs / nop questions... on: May 29, 2008, 05:44:39 pm
__asm__("nop\n\t");

this command turns the whole controller off?

and could someone point me to a reference containing the exact number of machine cylces a port manip command takes...

I have a bunch of other questions but I'll take this project one step at a time...

Thank you very much for your help....  
4  Forum 2005-2010 (read only) / Troubleshooting / Re: Switch to DC adaptor corrupting Flash? on: August 25, 2009, 11:02:17 am
Thanks to all.  I'm using Vin and just posting sloppily.  I'll try scaling back the resistor and maybe move the ON switch between the dc converter and board.

Edit:  The changes do seem to protect the flash, but the project still hangs after one sample, which I bet is software........  many thanks.
5  Forum 2005-2010 (read only) / Troubleshooting / Switch to DC adaptor corrupting Flash? on: August 24, 2009, 04:34:06 pm
So i have a 328 smt board analog-reading 6 pots, 4 outs to a L298 to relays, and a "wave shield".  I'm just using a wall wart power supply.  Between the 12vdc and Vcc is a empirical ~100[ch937] resistor because the regulator was getting quite hot.  I upload the code and it works swell, with or without the external power (relays and L298).  I then unplug the usb and "reboot" on DC to a very reproducible crash.  After the hang, the device will no longer work until i re-upload the program again.  What is the problem?  I wouldn't think its the code.  Is there a current surge during boot that the resistor fatally limits?  Extra caps at Vcc -> ground don't help.  The output (on a scope) of the power supply looks normal.  
Do I really need a zener et al?  I am missing something as the avr eats it so easily; everything else is triple checked.  Any advice is much appreciated.  Thanks in advance.
6  Forum 2005-2010 (read only) / Development / changing the crystal on: June 10, 2008, 06:43:35 pm
Seeing as  I cant find an earlier post  that answers my questions.............

I want to use a 14.@#$% crystal for video purposes...
I know very little about crystals................  but have a good grasp on DC theory......
Will I need to adjust the values of the accompanying caps?

Or more generally, how closely are the caps tuned?

Should their  [5 * (timeconstant)]  be tuned to the crystal?

Should should their 5 * .707 * (timeconstant) be the crystal freq.?

etc.

etc.    could some one even point me to a resource?  as I cant really dig a good explaination up....

thanks
7  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: "Group-buy" for parts and components on: July 11, 2008, 11:15:14 am
I would definitely be interested in a high-power and/or RGB LED bulk order.  calculate me in for atleast a couple hundred.

Ed.
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