Show Posts
Pages: [1] 2 3 ... 6
1  Using Arduino / Displays / Re: AIUTO - HELP WITH lcd shield for arduino mega (HY-TFT280_262K) on: June 05, 2014, 08:04:35 am
Instructions are on their web page for MEGA and UNO
2  Using Arduino / LEDs and Multiplexing / Re: Phi_prompt on: June 04, 2014, 01:13:57 pm
I'm pretty sure you need the correct back pack on your LCD for that library to work. It's a NICE back pack. :-)

Look on
3  Using Arduino / LEDs and Multiplexing / Re: How to debounce two buttons and LED? on: June 04, 2014, 10:06:55 am
There is a bounce library.

With three total inputs and outputs, one could use interrupt pins and either rising or falling; they only happen for one cycle.
4  Using Arduino / LEDs and Multiplexing / Re: 8x8 LED matrix with the MAX7219 on: June 04, 2014, 10:01:30 am
Check out the ones on adafruit that include the I2C back pack.
5  Using Arduino / Displays / Re: JoyStick with LCD display sketch on: May 24, 2014, 09:19:40 pm
I can't try your code because I don't have a joystick and my display has a back pack.

What do you think about adding some code to see if the joystick moved and only writing to the screen if something changed?

6  Using Arduino / Displays / Re: Looking for e-paper display on: May 24, 2014, 08:58:09 pm
You may have already seen the Adafruit display? Looks like you would really have to know a lot more than I do to use it.
7  Using Arduino / Installation & Troubleshooting / Re: Power Issues on: May 20, 2014, 11:14:58 am
Just an update.

I used a surplus power supply, that I'm guessing is from a computer. My project worked great; no power issues.
The power supply used is an Artesyn NFN40-760. I ran the RC servo and the common anode RGB LEDs off of the 5V output and ran the Arduino MEGA off the 12V output.

Next I was going to try a 12V choke on my 12V wall pack and see if that fixes my problem as well.
8  Using Arduino / Installation & Troubleshooting / Re: Power Issues on: May 18, 2014, 04:05:44 pm
Thanks, Grumpy,
I'll give it a try.
9  Using Arduino / Installation & Troubleshooting / Power Issues on: May 18, 2014, 03:11:25 pm
I'm using a generic MEGA. My project runs fine off the USB port but when I use a 12v 2A wall wart, the MEGA turns on and off.

The project uses a RC servo, a 20x4 LCD, 3 LEDs, 2 RGB LEDs, an Adafruit MP3 board, 5 pushbutton switches, 2 50mA sensors.
I could try running some of the devices on a separate 5V power supply and not off the MEGA.

So far, I've tried using a different MEGA, using a different wall wart. Checked the wall warts under load to another 12V device and was getting 12.1V.

My thought was that the USB port is limited to about 500mA and the project should work fine with a wall wart.

I guess I could try a third MEGA and see if the problem is the same.

Just wondered if the experts here have an idea?

10  Development / Other Hardware Development / Re: Proto Board Dimensions needed: DXF - PDF - PCB-ST on: March 05, 2014, 01:27:40 pm
Another approach is to use the free version of Eagle. Then use the Eagle files that are in the products area of this website for your Arduino.

Once you are in the Eagle file, you can print to your PDF printer.

If you google arduino uno dimensions; you will find various dimension schematics. There are different versions of the boards, and sometimes the mounting hole arrangements changed, so double check.

11  Using Arduino / Project Guidance / Re: Counting Pulses on: February 06, 2014, 02:51:49 pm
Without understanding your problem completely...

Can you use an interrupt pin and increment a counter each time your sensor is FALLING or RISING?

As far as your sketch goes, what if you declare:
unsigned long count = 0;
12  Development / Other Hardware Development / Re: Arduino PCB Shield Design Tips on: January 15, 2014, 11:13:20 am
This is a link to another thread.

There is a video there, might help explain what my project is.

You can see my PCB has resistors, capacitors, a reset button, power block and mostly connectors.
Connectors are generic arduino male and female and some polarized, male, shrouded board to wire connectors.

Could I buy something like this assembled? In a small quantity (25). If yes, where? It's a simple shield and really just used to simplify and make a wiring mess more reliable. Then it could be all surface mount resistors! Then it is really a question of what is my time worth to solder all those pretty striped things... It takes about an hour for me to solder a shield.

Even if some of it assembled would be worthwhile. For example those smooth, striped, colorful tubes of resistance. So, question is, what on my PCB is a problem for assembly businesses?
13  Using Arduino / Programming Questions / Re: Copy a STRUCT record to SD ? on: January 13, 2014, 09:52:45 pm

My question was off topic. I just thought you are PaulS - after all. And I don't know about hair or lack of such.


That last & did help my sketch to compile and I was able to save something to SD. And as you said, reading such a binary file was not something I can easily do.

I'm not sure how to mark this thread solved?

Thanks !!!
14  Development / Other Hardware Development / Re: Arduino PCB Shield Design Tips on: January 13, 2014, 09:41:05 pm
That picture doesn't look like a shield. It looks like a standalone PCB. But I can't see the bottom.

Doesn't really matter for this topic though, it looks like you know what you're doing.

Same can be said for greynomad's board, yikes! That is "heavy duty".

15  Development / Other Hardware Development / Re: Arduino PCB Shield Design Tips on: January 12, 2014, 07:59:14 pm
Hire a professional
I second that, given that I'm one of those professionals smiley

Trouble is everyone seems to think because electronics is fun the "professional" should design the Steve Jobs wannabe's project for the love of it.

If I'm going to work for naff all I'll work on my own dream.


I'd enjoy reading your tips! If I came to you for a shield, what could I do that would help you? What experiences have you had with Arduino PCB shields that you can share? Is there somewhere on this site (or elsewhere) where one can contact professionals for their services?
Pages: [1] 2 3 ... 6