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16  Community / Exhibition / Gallery / Big Clock LCD Display (with extras) on: February 26, 2013, 08:36:31 am
Here's a small Big Clock LCD Display I worked on, so I could display some agenda stuff, have alarms, etc ...



Gear used:

- Arduino nano (coded for the old ATMEGA168, but works with the new ATMEGA328 too)
- RT Clock + EEPROM
- Big 20 x 4 LCD Display
- Ultrasonic Sensor Module
- Buzzer

I will post the code and also links to each part I used after this.

The device is a custom clock with agenda and special alarms. Up to 50 events in the alarm, with option of recurring events, simple reminders and daily alarms. The ultrasonic sensor allows you to switch off an alarm, or display the entire agenda-events. The LCD will display a BIG Time, small Weekday/Day/Month (its all done in Day/Month format, sorry) plus the next event in the agenda. (if its a fixed-day event, not a daily event) The unit is programmed via serial, so its always connected to my PC. But when my PC is offline, it will still work since its totally self-contained. (serial use is just to set clock and events/alarms)











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BIG LCD

http://www.ebay.com/itm/20x4-Big-Number-LCD-Module-HD44780-Yellow-LED-2004G-A2-/320480796436?pt=LH_DefaultDomain_0&hash=item4a9e24df14

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RT (Real Time) Clock + EEPROM

http://www.ebay.com/itm/1PCS-I2C-RTC-AT24C32-DS1307-Real-Time-Clock-Module-for-arduino-AVR-PIC-51-ARM-/121069360260?pt=LH_DefaultDomain_0&hash=item1c304bd484

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Arduino Nano (this has a better chip)

http://www.ebay.com/itm/mini-USB-Nano-size-V3-ATmega328P-AU-Micro-controller-board-Arduino-compatible-/321018756276?pt=LH_DefaultDomain_0&hash=item4abe357cb4

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Ultrasonic Module

http://www.ebay.com/itm/1pcs-HC-SR04-Ultrasonic-Module-Distance-Measuring-Transducer-Sensor-for-Arduino-/110954970893?pt=LH_DefaultDomain_0&hash=item19d56e7f0d
17  Using Arduino / Project Guidance / Re: Arduino UNO Pinout Diagram on: February 14, 2013, 04:23:33 pm
Thank you so much for this!!!   smiley-cool
18  Using Arduino / Audio / Re: New library for PWM playback from SD cards: SimpleSDAudio on: January 26, 2013, 05:40:45 am
I'm loving this, already using it in a solar-powered project.

Now, maybe I'm daydreaming, but I would love to be able to output AM Radio Modulation instead of audio.  smiley-twist

http://dangerousprototypes.com/2011/10/05/am-sofware-radio-using-arduino/

Code:
http://dangerousprototypes.com/forum/download/file.php?id=5107&sid=9ed56f436c83604b287f75ec73f11146

19  Products / Arduino Due / Re: VGA output on: November 07, 2012, 02:04:31 pm
Superb!
20  Using Arduino / Audio / Re: Arduino due - 32 bits ? on: September 28, 2012, 10:07:35 am
I just hope it isn't too expensive, now with the Raspberry Pi filling eBay and such...
21  Using Arduino / Audio / Re: Arduino due - 32 bits ? on: September 28, 2012, 10:02:22 am
Yeah! Thanks bud!  smiley-mr-green
22  Using Arduino / Audio / Re: Arduino due - 32 bits ? on: September 28, 2012, 09:24:31 am
What happened to the Due? Any release date yet?
23  Using Arduino / LEDs and Multiplexing / Re: Help me chose the right LED? 4 x 4 square grid with acrylic top on: September 10, 2012, 12:30:15 pm
Here's some white leds, they are 20kmcd (20000mcd) which is much nicer. I could just use the frosted-white acrylic or maybe try some blue, red, green, yellow, and see what looks nicer. ;-)

http://www.ebay.com/itm/200-pcs-5mm-Straw-hat-white-LED-Wide-Angle-Light-lamp-/120757955281?pt=LH_DefaultDomain_0&hash=item1c1dbc2ad1
24  Using Arduino / LEDs and Multiplexing / Re: Help me chose the right LED? 4 x 4 square grid with acrylic top on: September 10, 2012, 12:22:55 pm
Hummm, I'm also wondering on using white-leds, as they have better mcd, and just check if the acrylic supplier have other frosted colors. ;-)
25  Using Arduino / LEDs and Multiplexing / Re: Help me chose the right LED? 4 x 4 square grid with acrylic top on: September 10, 2012, 12:15:30 pm
Here's a 8000mcd one (100lm) which is nice, BUT, its too pricy, and I don't get how I can solder it, will I require some special PCB? Why so much current compared to the other ones?

http://www.ebay.com/itm/50pcs-1W-Red-LED-Without-board-Star-HIGH-POWER-100LM-140-light-DIY-S-/390408239164?pt=LH_DefaultDomain_0&hash=item5ae624f83c
26  Using Arduino / LEDs and Multiplexing / Help me chose the right LED? 4 x 4 square grid with acrylic top on: September 10, 2012, 12:05:36 pm
Guys, please, I'm building a 4 x 4 LED square grid. So, I will build a 25 cm x 25 cm box with 3 separations horz. e 3 vertically. So, in total, we will have a 4 x 4 square grid. (16 squares)

Each square will have a red led. On top, a white-frost acrylic, so now I need to figure out which led will be best. So I get good illumination and also a good view angle, so it just don't show a red dot, but an uniform red square.

Here are some leds from eBay, if you find better ones (only eBay) please let me know, ok?

http://www.ebay.com/itm/100-pcs-5mm-straw-hat-Red-LED-Wide-Angle-20000MCD-/120496125516?pt=LH_DefaultDomain_0&hash=item1c0e20f64c

http://www.ebay.com/itm/100-pcs-Red-5mm-straw-hat-LED-Wide-Angle-Light-Lamp-Free-Shipping-/170842661548?pt=LH_DefaultDomain_0&hash=item27c70422ac

http://www.ebay.com/itm/100Pcs-5mm-Flat-Top-RED-LED-Wide-Angle-Light-LED-/260520802647?pt=LH_DefaultDomain_0&hash=item3ca83ff957

This leds I already have here, but the V.angle are terrible.
http://www.ebay.com/itm/100-pcs-5mm-Red-LED-Lamp-Ultra-Bright-Free-Resistor-EMS-/160557816658?pt=LH_DefaultDomain_0&hash=item2561fddb52

Thank you for any advice.

Best Regards, WilliamK
27  Using Arduino / Project Guidance / Re: 16 Touch Sensors - its working [code] but I wonder ... on: September 08, 2012, 06:04:11 pm
Well, I will be building the prototype soon, it will handle 16 ultra bright LEDs, so one sensor per LED. I will check some nice screws this week, to see something I like. ;-) Once I have something nicer to show, I will post pictures.
28  Using Arduino / LEDs and Multiplexing / Re: Super Bright Red Led - BC547B Transistor, but which Resistors? on: September 06, 2012, 12:21:21 pm
I'm using the CapSense Library and a 16ch Analog Multiplexer. I had to mess with the code around a bit, in order to get only true positive touches.

http://arduino.cc/forum/index.php/topic,121508.0.html

As soon as I have the first prototype ready, I will post about it.  smiley-mr-green
29  Using Arduino / LEDs and Multiplexing / Re: Super Bright Red Led - BC547B Transistor, but which Resistors? on: September 06, 2012, 12:04:29 pm
Ok, here's the final deal, a friend also helped me out with the math.  smiley-mr-green

I will drive 2 x 74HC595 in series, so I can get 16 outputs.
Them I will drive those 16 outputs directly to 2 x ULN2803A

On each output of the ULN2803A, I will put a 100 ohm resistor + UB LED. (2.3Vf 20ma)

In my tests it works perfectly. And if I want a second LED to make it more bright, I just put another 100 ohm resistor and add in parallel.

Now I need to get some White-Frost Plexy to test how this will look like.

Here's something some guys did that are similar to my idea. But I plan on using RED-Only LEDs (Ultra Bright) and a 4 x 4 pattern instead.

http://e2e.ti.com/group/microcontrollerprojects/m/msp430microcontrollerprojects/447779.aspx

The difference is that in my project, each square will be touch-sensitive. ;-)
30  Using Arduino / LEDs and Multiplexing / Re: Super Bright Red Led - BC547B Transistor, but which Resistors? on: September 05, 2012, 03:39:21 pm
Maybe I'm not explaining things right or I just got lost.  smiley-red smiley-eek-blue

Anyway, as I asked, can't I just use 2 x ULN2803 chips and 8 pins from the Arduino?
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