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1  Using Arduino / Displays / Re: I'm creating a project with lcd. on: June 14, 2013, 06:50:49 pm
Thank for your reply Don,

I know that using a potentiometer is an option. this is how must of the examples are drawns.
Just wondered if there IS a way to do it in code, rather then a potentiometer.. that was my Q smiley


2  Using Arduino / Displays / I'm creating a project with lcd. on: June 14, 2013, 01:26:50 am
I create a control for my wife's yogurt incubator, nothing fancy, basic dallas temp prob + lcd + relay.
I already had a working version that was my first Arduino project ...and electronic project
I found this great post ....
http://andybrown.me.uk/wk/2010/11/28/lcd-backlight-and-contrast-manager/
And had it all wired up and working well on both my arduino duemilanove and on my home made arduino duemilanove.
Since I wanted to have only the Tmega328 omn aboard (with the few extra parts) I soldered it all on a pcb (diy) and when I tried to get it to work for the first time it went CRAZY ... flickering and so on .. to the level it lost the bootloader ...
So I started to de-bug and since I'm new to all of this it took me a while,
Making a long story short I found this post back at the end of the above post
"This will eventually damage the Arduino. You need a resistor on the contrast circuit otherwise every time the Arduino drives the pin low, it is shorting that cap to ground. Inrush current into the AVR will be large (but brief). Eventually that port pin will likely die"
So I ended up cutting the capacitor out and soldering a 4.7k resistor the ground, placing the background at nice readable but not to bright state.
So my Q' is
1. is the resistor is the right answer ?
2. if so can some one (pretty please) show me in a drawing how it should be connected (I'm new .. but I learn fast from examples ..) and what should be the value of that resistor.

Once I get the project done (maybe be even with the contrast feature) I will post it on the exhibition part of the forum.

thanks in advance.
Tal.


3  Community / Exhibition / Gallery / Re: ZORK for the Arduino on: July 14, 2012, 06:01:08 am
After endless attempts I gave up on the TVout and revert back to the GLCD.
So here is a version with paging (up to 6 at the moment).
It will only work on Mega 2560 (memory).
I'm going to work on a better "scrolling" interface, to make it smoother and not "page" blocked.
Code attached.
Would love to hear some feedback
4  Community / Exhibition / Gallery / Re: Fast 130ms Ping Pong Robot on YouTube on: July 12, 2012, 11:07:25 pm
Great job ! smiley
5  Community / Exhibition / Gallery / Re: Yaw Control Of Race Car on: July 07, 2012, 10:52:08 pm
Very nice ! smiley
6  Community / Exhibition / Gallery / Home brewed Arduino Duemilanove on: July 05, 2012, 02:57:31 am
After doing some projects on several arduino boards, I felt ready to try and use only the AT328P chip.
I found this great post:
http://itp.nyu.edu/physcomp/Tutorials/ArduinoBreadboard
And this led to some ebay ordering and that’s the first step:



Then I thought to my self, hey it will be cool to have a proper board to place the chip into. So started to plan one, and here is the process and the end result.






First test of "Blink"



Testing the D 2 --> 13 by making a "running light".
I also tested the A0 5 by placing a potentiometer and setting the speed of the
running light by reading the interval from the analog pin






The Aref pin is wired next to the 5V pin, and "short" by a jumper.

I added a ON/Off Switch.
Both of the build in LEDs: Power and Pin13, has a jumper, so you can disconnect them.
The chip was bought with an Duemilanove bootloader
7  Community / Exhibition / Gallery / Re: Hors Piste Tokyo - LED Immersion on: July 04, 2012, 12:53:40 am
GREAT work !!
Impressive clip, just shared it …
 smiley
8  Community / Exhibition / Gallery / Re: ZORK for the Arduino on: June 22, 2012, 09:55:21 pm
That was a very interesting challenge and I'm happy to say I got a BETA version.
Mega 2560 (only!!) , SD Card reader, PS2 connector and keyboard, TV out and screen = azipM2560.
It's far from being perfect but I got it to work, I even added the logo



in the near future list is to get the page scrolling up to work which won't be that hard since I got some of the logic from the receiver version I coded. probbly by the ned ofthe weekend.
The kb is "acting" strange; I can guess it has to do with the interrupters of both the SD and KB libraries. I'm not that knowledgeable in C, but I like learning new things
Hope you like it
Code attached in rar file

H/W connecting and libraries-

** SD CARD **
CS - D53
DI - D51
CLK - D52
DO - D50

** PS2 mouse **
Data - D2
CLK - D3
You can find information here
http://www.arduino.cc/playground/Main/PS2Keyboard



** TV - OUT **
Video - D29
Sync - D11
You can download the library (fonts included) & schematics here:
http://code.google.com/p/arduino-tvout/
ONE NOTE: I had to change the "static void inline sp" to "sptvout" since is z-types has an SP void as well. You will need to apply the change to the TVout.h and TVout.cpp (drop me a line if you want the revised version I got).

Wish list for next versions:
* Pages for scroll up/down - in the near future since I got this code ready from the azip-reciver that I build before.
* Show Courser while typing.
* Show sand watch while "thinking" (reading from sd).
* Check kb presence on load (not just init)
* get the Save/Load to work?
* Start menu to allow change of font size (not sure it's doable)
* Start menu to choose game (I-II-III) - again not sure it's doable.
* check KB issues (interrupters?)


9  Community / Exhibition / Gallery / Re: grovercam.com Interactive website on: June 11, 2012, 07:45:46 am
Very cool, It immidatly got me thinking of makeinf one for our cats smiley
Great post !
10  Community / Exhibition / Gallery / Re: star wars blaster with arduino on: June 11, 2012, 01:00:33 am
Very Cool !!
Would love to see the comlete project smiley

11  Community / Exhibition / Gallery / Re: LPD8806 LED strip project on: June 06, 2012, 10:10:22 pm
Very cool !!!!! smiley

Would love to see the code when u post it, I defently know whats the next thing I'm orderign from ebay smiley-wink
Can you be kind and post a link to a simlir product that u used, like the piazo pickups and the led strip ?
Thanks for sharing smiley
12  Community / Exhibition / Gallery / Re: ZORK for the Arduino on: June 06, 2012, 12:57:19 am
code attachd ...
13  Community / Exhibition / Gallery / Re: ZORK for the Arduino on: June 06, 2012, 12:56:00 am
Thank you for your kind words Louis.
Since the text is longer then what the glcd screen can show on one page, I added pages (up to 6 – memory limitation), you can use the Page up / Down to move between them. Also if you are not on the CURRENT page and try to type (something else then pgup/pgdown) the screen will "jump" back to the current screen.
The Backspace is working as well so you can fix a typo if u made one.

Connect a ps2 keyboard to the Arduino. GLCD screen, and then connect between the arduino that has the SD card (the brain) and this one using the Tx/Rx (pin 0/1). Note when doing so TX  RX and RX  TX  so digt1 will go to digit2 on the other board and digt2 will go to digit1 on the other board.

I can not pass the code here as well (lenght limitation of the post) ... so I will post it in a new reply,
would love to hear comments/suggestions:

14  Community / Exhibition / Gallery / Re: ZORK for the Arduino on: June 04, 2012, 12:23:30 pm
It took me for ever …. But I made it.
The original plan was to use one arduino with TV-out and PS2 keyboard.
Due to lack of space and other tons of issues I ended up building a computer side, with GLCD (the TVout interrupters drove the serial communication crazy) and a PS2 keyboard using the PS2Keyboard library.
This way all I needed to do is to connect the 2 arduinos with RX/TX lines.

Some photos …






I still need to work on it a bit, to make the delete work for example…
But except that its working great.
I ordered a new MEGA2560 and I will try to put them all on the same board with the TV-out (since I can then cancel the Serial communication).

15  Community / Exhibition / Gallery / Re: ZORK for the Arduino on: May 29, 2012, 08:23:09 am
Your the best!! I missed the "line ending to Newline" ...
That is soooo cool ....
Defently will be great if it can be outputed on the TVout library ...
I will take a look and see if I can find a way to do it ....

Way to go smiley
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