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1  Topics / Device Hacking / Re: Unknown LCD Display --HELP-- on: October 10, 2013, 02:13:28 pm
if the dvd player had composite video in it would have been more use but the lcd panel on its own is scrap
2  Using Arduino / Displays / Re: Microtivity LCD diode on: September 22, 2013, 11:19:47 am
Im guessin they are hoping on the diodes 0.7v voltage drop to bring the 5v down to the 4.2v backlight voltage, it wont however limit the current if anything goes wrong
3  Using Arduino / Microcontrollers / Re: PIC uC on: July 30, 2013, 04:33:13 pm
The only thing that annoys me about arduino IDE is I couldn't fit a random blink candle sketch into an attiny13, it compiled over the 1k of attiny13 memory, however using asm it compiled to around 400 bytes.

theres a pic for every project but has a smaller community, arduino has a library for every project and a large community
4  Using Arduino / Microcontrollers / Re: Advantages of Arduino Uno over PIC18F4550 on: July 28, 2013, 03:55:46 pm
Well i know which one i'd go with, but the Uno is useful for quick prototyping and has a larger community, I do prefer MPLab overall as it's a one stop IDE covering the whole Microchip range, right now though im playing with rasp pi, GPIO's are limited but when combined with an atmega328 as an i2c slave it works well
5  Using Arduino / LEDs and Multiplexing / Re: LED sine wave via analog pin on: July 09, 2013, 02:05:59 pm
6 Led's, 60 degrees out of phase, showing only the top half of the sine wave, it would'nt be hard to show the negative side using bi colour leds

6  Using Arduino / Microcontrollers / Re: Uploading sketch to Xino problem on: June 11, 2013, 02:42:40 pm
2 things spring to mind, is the usb-ttl adapter real ftdi or cp2102, i have cp2102 and the reset pin on it is to reset the adapter not the arduino, also the pins on my adapter are labeled tx connect to tx and rx to rx, stupid i know.

one simple way to test the adapter is to short tx & rx together open a terminal on your puter and see if anything comes back when you type
7  Using Arduino / Microcontrollers / Re: ATMega 328 Breakout Board on: June 10, 2013, 01:38:09 pm
I have 2 of these, right price, I like them for the 5 pin power and uart connector
http://www.ebay.co.uk/itm/K011-XINO-Basic-for-Atmel-ATMEGA-AVR-lowest-cost-Arduino-compatible-kit-/321138392983?pt=UK_Computing_Other_Computing_Networking&hash=item4ac556ff97

The xrf carrier boards plug straight into it
http://www.ebay.co.uk/itm/K012-XBBO-XBee-XRF-BlueBee-RFBee-break-out-board-NOW-added-new-features-/221233258481?pt=UK_Computing_Other_Computing_Networking&hash=item3382879ff1
8  Topics / Device Hacking / What you least expect to find in a multimeter? on: May 21, 2013, 03:48:28 pm
An infrared usb interface?

I have this meter, a N56FU from maplin



it has a usb interface to transfer data to pc



I.ve had this meter for a while and never investigated the insides, i was expecting the usual adc's but not this



It's an infrared usb interface, has the usual cp2102 serial to usb chip but why infrared? Then it occured to me that being optically isolated should the meter go boom the pc connected to it won't, I thought this was clever, simple but clever.



I have no plans to hack this meter, it's a pretty good bit of budget kit, pointless post but I thought i'd share it
9  Using Arduino / Networking, Protocols, and Devices / Re: Thumbs way down for Arduino WiFi shield. Read before you buy on: May 13, 2013, 02:03:20 pm
Yay open source,

If time was taken to design and produce a reliable product someone else will rip it off and sell it cheaper, so, an idea is had, rushed into production with the idea of clearing up loose ends later with updates and bug fixes.

What is arduino anyway, it's really just the IDE, the boards are just carriers for the Atmega range of chips with the pins broken out into a standard form factor.

"Arduino" the concept should be for even the greenest of noobs to plug in the lcd shield and it work first time, even that doesn't happen with too many 3rd parties making shields with their own libraries and pinouts.
10  Topics / Device Hacking / Re: help with datasheet on: May 11, 2013, 07:39:10 am
Forget the black "mound" but the other chip you mention is a H-bridge, how about some pictures if possible,

I've stripped a Big Trak http://www.bigtrakxtr.co.uk/ to use a robot base, it was easier to strip it right back and just use the drivetrain than try to reverse engineer the electonics
11  Using Arduino / Motors, Mechanics, and Power / Re: Problem Trying to Make 2 Servos Sweep Only Once on: May 11, 2013, 06:50:00 am
glad you got it working, yes anything is possible if you put your mind to it.
If you don't need slow motion servo's do away with the for() and just set pos to 180 for one button state and 0 for another state
12  Using Arduino / Motors, Mechanics, and Power / Re: Problem Trying to Make 2 Servos Sweep Only Once on: May 10, 2013, 06:16:05 pm
Hi,
the code you have posted works ok for me, servo's travel 180 degrees then return and stop, pressing the button while the servo's are traveling has no effect for me, so i ask how you have connected the button?

I have 10k resistor pulling up pin two and a button connected to 0v and the other side connected to pin 2 so when the button is pressed it pulls pin 2 down
13  Topics / Device Hacking / Re: i2c communication / Has anyone hacked a Tesco's £1 AM/FM Sports Radio on: April 16, 2013, 01:08:30 pm
Hi All,

I don't have much experience with i2c and would be most gratefull if someone could answer this question

when writing to one register I do this?
Code:
  Wire.beginTransmission(id);
  Wire.write(0x06);    // reg to write to
  Wire.write(0x00);    // highbyte
  Wire.write(0xb5);    // lowbyte
  Wire.endTransmission();

when writing to a number of registers one after the other I do this?
Code:
 
unsigned int testFM[]=
{
0x80, 0x00,  // Reg 0x00
0x10, 0x80,  // Reg 0x01....
... code cut to save space .....
0x00, 0x00,  // Reg 0x27
0x44, 0x00,  // Reg 0x28
0xff  //end
};

  int i=0;
  Wire.beginTransmission(id);
  Wire.write(0x00);   // start at address 0
  while(testFM[i] != 0xff)
  {
    Wire.write(testFM[i]);      // send highbyte
    Wire.write(testFM[i+1]);  // send lowbyte
    i+=2;
  }
  Wire.endTransmission();

Thanks
14  Topics / Device Hacking / Re: Has anyone hacked a Tesco's £1 AM/FM Sports Radio on: April 08, 2013, 01:16:44 pm
@ seadanzig,
Not really, i've had alot of family commitments and been unable to tinker with it, but tonight i did buy another radio because the chip on the first one was covered in silicon gunk, this one isn't.

The chip is marked BK1088 and the datasheet is http://aitendo3.sakura.ne.jp/aitendo_data/product_img/radio/BK1088/BK1086-88%20Datasheet%20v1.0.pdf

So i will be studying that tonight and hopefully make a bit of progress over the next few days
15  Using Arduino / Installation & Troubleshooting / Re: Arduino IDE SLOOWWW while verifying on: April 04, 2013, 04:04:56 pm
Times i have had this problem it ended up that is it was after installing a bluetooth device, I disabled bluetooth and the problem went away, installed it and the problem came back, something to do with ports
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