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1336  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Suggest a Breadboard Arduino,Please! on: January 18, 2011, 08:31:15 am
Look at an arduino schematic for a clue.

ICSP programmers and the process is basically designed to connect directly to the AVR chip's pins.
1337  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: How to implement simple logic gates on: January 17, 2011, 09:12:17 pm
It still has it's place.  In fact, you can now buy Single Gate packages. (...Something you could not do when these TTL chips were created... I mean, the goal was to cram as many as you could because you needed them).

Example: M74VHC1GT00DFT1G Single 2-input NAND gate in SOT-353 package.

Why is this good?  With Micro-Controllers you might only need 1 maybe 2... and so there you go.

Not dead... just sleeping longer.
1338  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: USBtinyISP vs USBasp on: January 16, 2011, 09:01:28 pm
I love my USBtinyISP.  The kit isn't really that expensive.
1339  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Newbie - Powering Arduino in Public Setting on: January 14, 2011, 10:30:24 pm
I use a cheap "NITROPOWER" 9.6V Radio Control NIMH battery with an Adapter that fits the board.  Works Nice.
1340  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Slow download from Google Code on: January 14, 2011, 10:14:32 am
Yay... another headless body... wheee....
1341  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: PC Comunication on: January 14, 2011, 10:13:40 am
The Arduino is seen as a COM port to the PC when plugged in to USB.
1342  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Powering USB Boarduino on: January 14, 2011, 10:19:46 am
Well, the boarduino already has that connection.

With mine, I do just that... I have one of those nice breadboard plugin supplies and attach it and the boarduino 5V pin to the 5V rail on the breadboard.

Later on, you would just feed 5V to the 5V pin and move the USB power jumper.  The jumper would let you isolate the USB hardware.
The PWR solder-jumper is a bonus for advanced users, it allows you to run the USB Boarduino at a different voltage. It is by default shipped with a trace connecting the two jumper sides, which means that the AVR is running at 5V from the USB port. If you would like to say, run the AVR at 3.3v, you can cut the jumper with a sharp xacto/craft blade (check with your multimeter that it is no longer shorted) and then on the breadboard, connect the *VCC* pin to the 3v pin. This will run the board off of the FTDI chip's internal 3.3v regulator, which we should warn you can't supply more than maybe 50mA. Also, be aware that running a 16MHz AVR at 3.3v is considered 'overclocking'. We've never had a problem with it for hobbyist use but just be aware that this is outside the guaranteed performance of the microcontroller
1343  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Ultra brand spanking newb question on: December 22, 2010, 09:36:46 pm
May I ask a silly?

When you say "Installed arduino software", what exactly do you mean?

The Arduino IDE Software?  The communication drivers for the board?  Both?

I hope you meant both.  Arduino boards do need drivers installed before the system sees them, especially if is Windows is your platform.
1344  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Arduino or C++ on: January 12, 2011, 09:48:34 pm
So sue me... I always talk in analogy mode...

It's sort of like Microwavable Food.  Arduino is still "Food"  (I mean it is C)  but someone did a lot of work so all you have to do is pop it in the microwave and you have something.  You don't have to cut up smelly garlic and worry about burning your "shrimp scampi".  With Arduino you practically heat and eat.

It's quicker and can be more fun... unless you are a "C" chef. Few of us are but there are some here anyway.
1345  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: .:oomlout missing? on: January 12, 2011, 12:09:29 pm
BT cocking up? It's unheard of!

Hehe... I have personal reasons to understand where that's coming from.
1346  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: What Microcontroller blogs do you follow? on: January 12, 2011, 09:19:58 am
1347  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: piggybacked arduinos on: January 11, 2011, 01:19:46 pm
I'm going to stick by what I have said in the past.   The AVR chip is the BRAINS  not the MUSCLES.  You want MUSCLES, add peripherals...  Like transistors or driver IC's.

Why does everyone seem to have this idea that this simple little micro-controller can or should do everything without adding hardware... yet have a good  understanding that more hardware is needed when comparing and IPOD driving an earpiece and a 100W at home stereo driving massive speakers just baffles me.
1348  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: start stop code on: January 08, 2011, 04:52:22 pm
Think it out.

Set the LED based on a VARIABLE you set, not based on a button action...

Meaning... When you check for button state... set  a status variable... don't mess with pin state right away.

When all your button checking is done... only then check to see what you have....

1) Check to see if last button press and current button press are the same...
2) Based on item 1 for both buttons... No button presses... do nothing

3) Button1 press  mode=on

4) Button2 press mode=off

SET LED based on MODE

What I'm really trying to point out is:  Don't use this logic --> "ledState = digitalRead(ledPin);"
1349  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: Extending arduino cable on: January 07, 2011, 09:07:51 am
This might just be one of those situations where using RS232 is a good idea.

Worst case is that you might need to buy a USB-RS232 Adapter for the PC... but unlike USB... RS232 was designed for distance.
1350  Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: VU Meter- Earthling question.. i think? on: January 07, 2011, 09:49:32 am
Some notes:

1) Audio Line Level = +/- 0.447V Peak to Peak.  (yes, that is Plus and Minus voltage... something the Arduino input does not want to see.)
2) The Arduino input expects a voltage between zero and 5 volts for full scale reading.

When you TOUCH the input... you are creating a huge spike... that's why you might see it.

Things to try/research   1) Amplify 2) Use a comparator or Schmidt trigger  3) look at some frequency counter input circuits for ideas.
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