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31  Forum 2005-2010 (read only) / Interfacing / CD22M3494 Crosspoint switch on: December 11, 2007, 03:10:06 am
This seems to have possibilities
http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=CD22M3494E-ND

With one 7 bit word input to this it will turn on or off one of 128 switches. It could route signals as intended. It could be used as a matrix to drive low current devices or with add on components drive higher current devices.  It's intent is to route signals but it can do more.

Last price on them was $5 and this style of IC seems to be going away which is a pity. smiley-sad

I think the reason is because of devices like this
http://gamma.octopart.com/Lattice_Semiconductor__ISPGDX160A-7Q208.pdf

32  Forum 2005-2010 (read only) / Development / Re: LCD4Bit code to support 4 lines on: December 27, 2007, 08:25:40 pm
Your explanation is less confusing mem.
33  Forum 2005-2010 (read only) / Development / Re: (Help) Computer vs Arduino on: December 09, 2007, 09:11:19 am
http://processing.org/

This works well and it's free. You can also you Flash and Max of which I have no clue.

I tried one of the examples and it's pretty cool. You can send a value from say a pot or a button to processing and have it do something. In one of the examples it changes the color of a window but it could post that value to a web page or make a blog entry or operate locally in many ways.
34  Forum 2005-2010 (read only) / Troubleshooting / Re: I received my arduino Uno today... :( on: October 13, 2010, 02:55:50 am
Based on the fanboi dogpile on Moogie for his blog post I will be viewing my recent purchase of an Uno and Mega with a critical eye.

I despise the fanboi dogile in that blog post almost enough to return the product unopened and use the extra money to buy non-arduino branded boards sans fanaticism.
35  Forum 2005-2010 (read only) / Troubleshooting / Re: arduino mega power trouble on: October 16, 2010, 05:02:03 am
The latest Mega has 47uf at 25v, round can surface mount. I've PM'd you with an offer to send you some that will work. 100uf 25v or 50v should do.

Regulator IC4 and IC5 on the Mega have a max 20V input so unless you exceeded that you're ok. If the board you have has some lesser part as they did with the capacitors they may be fried.  




36  Forum 2005-2010 (read only) / Troubleshooting / Re: Homebrew LED Christmas Lights on: October 03, 2009, 07:18:34 pm
I've used an SSR (solid state relay) with the arduino and LED xmas lights. Make sure the SSR can handle the load. I used 25 amp ones which are serious over kill.  

This is using a string rated at 120VAC.

With with a serial in parallel out shift register string I can control several hundred of these.
37  Forum 2005-2010 (read only) / Troubleshooting / Re: Did I Kill My Diecimila? on: December 20, 2007, 07:34:01 pm
Have you fixed it? If not was that replacement chip one that had a Decimilla bootloader on it?
38  Forum 2005-2010 (read only) / Troubleshooting / Re: pressing reset button required to start progra on: November 25, 2007, 08:50:44 am
Please let us know what it is and have a look at the code.

There is a design defect with the NG running stand alone. Pin 13 will blink then it looks as if it locks up.

You need a 10k resistor to the RX pin (D0) and ground or the noise makes it listen for the USB constantly. It will work find if the USB is hooked up.

I have a proto board and stuck one in D0, and ran it to ground. I'll eventually get one permanently installed.

39  Forum 2005-2010 (read only) / Troubleshooting / Re: Diff. in burning sketch from IDE and direct on: November 25, 2007, 08:40:18 am
Arduino pin 13 goes to atmega168 pin 19 as well as the ICSP pin 3. I assume something in the programmer is drawing down the current. Try changing to an unused digital pin or unplugging the programmer as suggested and powering it up.
40  Forum 2005-2010 (read only) / Troubleshooting / Re: QT401 slider touch conversion on: November 25, 2007, 10:30:13 am
I don't really understand what you said.
41  Forum 2005-2010 (read only) / Troubleshooting / Re: AVR chip by itself on: November 25, 2007, 10:23:04 am
http://www.ladyada.net/make/boarduino/

If you make it yourself it's very cheap and you can pop a chip in and go. You'd need to swap the chip into an full Arduino or buy the extra cable to program it.

42  Forum 2005-2010 (read only) / Troubleshooting / Re: Diecimila on: November 25, 2007, 09:49:21 am
I tried it and you're correct. I used pin 5 and it's fine digitally, the minute it gets a analogWrite it will never go completely off even if I set it to zero with analogWrite

BUT
Try this:

In setup set the offending pins as outputs. analogWrite doesn't care

When ever you need a zero digtalWrite(pin,  LOW);

I just tried this and it worked. I tried setting the internal pullup on and off with no effect so I'm not sure why those pins are acting up.

43  Forum 2005-2010 (read only) / Troubleshooting / Re: Toasty Diecimila on: November 25, 2007, 08:44:04 am
I'll remember that about Make. It's pretty disappointing that they'd not support it. I hope the Arduino folks will.
44  Forum 2005-2010 (read only) / Troubleshooting / Clean and shiny Re:No Serial communication on: July 11, 2007, 02:57:50 am
Make an additional power supply that takes the automobile power and cleans it up.

http://www.elecfree.com/electronic/power-filter-regulator-circuit-with-lm1084/

That's a pretty good circuit, you can leave out the relay and it's control circuitry unless you have a need for it. As well as some of the other connectors and wires.


http://cache.national.com/ds/LM/LM1084.pdf

I really like the specifications of that part but you can use about any three terminal regulator fixed or adjustable that's within the Aruduino's recommended voltage and current rating. Just setup an adjustable one properly and you're set.

45  Forum 2005-2010 (read only) / Troubleshooting / Re: Reset Problem when USB is disconnected on: June 24, 2007, 04:57:49 pm
Oh, that's something to make sure people know or put a jumper and resistor on for the next revision. I had the same issue and was worried I'd not be able to use my Arduino standalone.

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