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5221  Community / Bar Sport / Re: EMP - faraday cage on: June 16, 2011, 04:59:40 pm
Put your valuable electronics in a metal box and bury it in the back yard  smiley-mr-green
5222  Using Arduino / Project Guidance / Re: Using an LCD display w/menu instead of tons of knobs/switches.... on: June 16, 2011, 03:44:59 pm
Using an LCD and keypad is not hard at all. Once you wire them right (looking at your site you are quite mechanically and electrically inclined so no problem).

The hard part is to write some code that does the menu, input values or select from a list of functions for each input to map to, but, that can all be done with libraries such as the phi_prompt library, which I wrote.

Check out this post and videos:,62021.0.html

FalconFour has used my library to do several of his projects. Here's one:,62955.0.html

Thanks for mentioning the Phi-1 shield. BTW, I have updated the Phi-1 shield design and released Phi-2 and phi_prompt library to support the software side;) But as you can see from FalconFour's project, you can make the library work even without the shield, although using the shield makes things easy, and encourages me to write more codes and update libraries more often;)
5223  Using Arduino / Displays / Re: LCD visibility on: June 16, 2011, 03:33:49 pm
My experience is similar. One addition, the black/white character on blue back drop works very nicely under bright sun light with no back light but is impossible to see indoors without the back light on.
5224  Using Arduino / Displays / Re: Melabs 16*4 LCD on: June 15, 2011, 11:53:58 pm
Do you mind using parallel interface LCDs? They're not that hard to use at all.
5225  Using Arduino / Displays / Re: LCD Display Question on: June 15, 2011, 02:28:41 pm
All is possible. I would suggest an HD44780-compatible 20X4 character display for simplicity. Don't have to be serial displays as they cost more. For entering numbers and such, you need a keypad or several discrete tactile switches acting as up/down/left/right/ok/esc. Everything else is software issue. Please read this post. It's a User Interface library I released specifically for what you asked for, changing things with keypad and seeing them update on LCD.,62021.0.html
5226  Community / Bar Sport / Re: Your latest purchase on: June 15, 2011, 02:22:58 pm

Judging from the picture I might have got the exact same one a while back. Pins are not laid out compatible with RBBB or minis and I had to get a little plug (mine didn't have it like pictured on the page you linked to) for it. I haven't figured out a way to do auto reset yet so I just push reset on the RBBB. Now I got a USB bub V2 (more expensive) from moderndevice I'm using the new one.
5227  Community / Exhibition / Gallery / Re: Alarm clock from Atmega328 and 7-segment display on: June 15, 2011, 01:38:48 pm
I made different clocks back in college - transformer to get voltage down to a rectifiable voltage to make DC, dividing down the mains to make 1Hz.  One design had 60 LEDs in an outer circle for minutes, 12 in an inner circle for hours. Learned about switch bounce on that one too.
I still have the board for it, covered in dust in a box, chips pulled out for a later project.
The mix of hardware/software that uCs bring to the table make things a lot easier to bring to completion without a big pile of chips.

The frequency may not work in all parts of the world (50/60Hz difference) smiley

BTW, did you do Charlie-plexing on the 60 LEDs?
5228  Community / Gigs and Collaborations / Re: need some major help with project... on: June 15, 2011, 12:47:41 pm
Please use the "code" button when posting your code. Look at the picture attached. The "code" button is boxed in red.
5229  Using Arduino / Displays / Re: LiquidCrystal lib – use analog A1 & A2 pins on: June 13, 2011, 05:09:54 pm
Thanks liudr,
Perfect, will give it a shot tonight - (I have a LM34 temperature module input on A0) hence using the A1 & A2, but cheers for the reminder just in case!


It was worth checking/mentioning smiley

Reply back if you have any trouble.
5230  Using Arduino / Displays / Re: Starting LCD 20x4 on: June 13, 2011, 05:07:30 pm
I don't think I can read anything from this out-of-focus image. Try one more time.
5231  Using Arduino / Displays / Re: LiquidCrystal lib – use analog A1 & A2 pins on: June 13, 2011, 03:11:12 pm
Use digital 14-19 for analog 0-5. So you should say:

LiquidCrystal lcd(12, 8, 7, 16, 15, 4);

Have in mind analog pins also start from zero like digital ones so your A1 is the second analog pin.
5232  Using Arduino / Displays / Re: LCD Brightness via PWM? on: June 12, 2011, 11:52:56 am
1) Let's trim off the excess lead on the soldered pins. They look almost touching on another at places.
2) Back light is really bright. What resistor did you use?

I find my blue display with white letters sluggish and impossible to read without back light I wonder if it's the same with yours. I typically go with green or yellow display with black letters now.
5233  Topics / Education and Teaching / Re: Starter Sets: Electronic Bricks, Online Manual available on: June 10, 2011, 01:37:41 pm
Add an arduino for upwards compatibility to later stalk cat or mailman.

I have thought about making a mailbox robot to sing and offer the mail man a gift card around X-mas. I just didn't get a house yet smiley
5234  Using Arduino / Displays / Re: Sparkfun 3.3v LCD with arduino??? on: June 10, 2011, 01:31:08 pm
OK I understand. Can you return it for a swap then? What you proposed could work but you will spend too much time trying to make it work or worse damage the lcd or arduino. I would save some money to buy a 5V while trying to return or sell the 3.3V lcd if I were you.
5235  Using Arduino / Displays / Re: eblock lcd issue on: June 10, 2011, 10:56:02 am
The document says 3.3V supply. Have you used it successfully with other microcontrollers?
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