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151  Community / Gigs and Collaborations / Re: Paid Opportunity for Arduino Programmer (Datalogging and Sensor integration) on: April 19, 2014, 03:48:12 pm
I have already designed, built and delivered something very much like this for other clients this year.

When you say depth/pressure are you talking about liquid submersible or barometric air pressure.

All of this can be done on an Uno or pro mini if space is a factor. a simple tilt compensated compass will give you a good direction reading but for heading then a GPS is your best bet. You can get a simple external SD card reader and connect it directly to the Arduino through the SPI interface and use the default SS of D4. Your GPS will be UART and most IMUs are I2C. Thermometers based on the Dallas 1 Wire will take up another port ... but leaves lots of IO for other things like a LCD display or some status LEDs Etc.

I have sent you a PM fee free to get in touch.

Cheers Pete.
152  Community / Gigs and Collaborations / Re: Project - Will pay for completion on: April 18, 2014, 02:43:25 pm
OK so we are looking at the remote being quite small especial if you want 4 buttons on it. There are quite a few key fobs out there which are designed for the hobbies market that we can use for this.

The receivers from Adafruit like these 4 units at $4.95

Using a remote control like this at $6.95

The electronics and firmware are not too difficult to create most of it already done by the Adafruit remote and receivers but the mechanics of moving a rod 3 inches with a reasonable amount of power to move a book etc are more challenging.

I will do a bit more fishing for you.

What is your budget/timescale  for this. Feel free to send me a PM if you dont want this public.

Cheers Pete.
153  Community / Gigs and Collaborations / Re: Project - Will pay for completion on: April 16, 2014, 04:06:29 pm
I am interested, but i have a few question. How big/small can these devices be , what is the length of travel of the "rod". What distance are you wanting the remote to work over , how small should the remote be.

Check out a few of the other projects that I have worked on on my website If you think i can help you drop me a PM or an email and we can chat some more.

Cheers Pete.
154  Community / Gigs and Collaborations / Re: RJ45 - RS232 - MAX3232 - Arduino interfacing/communication on: April 12, 2014, 06:27:51 am
you need to be doing loopback test at each stage to be sure that the data flow is correct and that you have not somehow inverted the tx/rx lines in this chain.

I would start by looping the tx/rx on the ttl-> 232 level converter and setting up the Arduino to send data and then check to see if you are getting anything back on the same port. this can be done by using the softserial example in the IDE and using the soft port to connect to the converter and then use the serial monitor to send/receive data.

Once you have this working then extend the chain to the next point again making the end a loopback.

It should be noted that rs232 valid signals are either in the range of +3 to +15 volts or the range −3 to −15 volts with respect to the ground/common pin.  You say that the device you are connecting to is 24volts. I am presuming that this is the power supply and not the voltage levels of the serial interface. RS232 is a bipolar signal that swings BOTH sides of the 0v rail and not a single pole signal that only moves in one direction with respect to the 0v rail. I.E 0 to +24 volts.

I see also that your RJ45 end has a RTS control line . This may have to be driven if the device is dependent on hardware handshaking. I also note however that there seems to be no CTS control line.

Hope this helps.

Cheers Pete.
155  Community / Gigs and Collaborations / Re: Have a great idea. Need technical expertise and development. on: April 12, 2014, 06:01:53 am
I have built a twitter reader and LED matrix display system for another client using this combination (Arduino/Temboo).

I have sent you a PM with my details

Cheers Pete.
156  Community / Gigs and Collaborations / Re: Interesting project Arduino Serving tray on: April 12, 2014, 05:51:06 am
My question is ...

                       Why are you using a complex system with reflective steps on a rotating tray. Why not use a stepper motor with a single point on the tray that serves to specify a fixed point in the rotation (Home position).. Ohh and what do the "knight Rider" lights do.

Cheers Pete.
157  Community / Gigs and Collaborations / Re: Controlling a motor with iphone on: April 11, 2014, 05:35:07 am
HI Oli,

                      Check out my website for the sort of projects that I work on then drop me a MP or email if you want to take if further.


Cheers Pete.
158  Community / Gigs and Collaborations / Re: Arduino Uno-Can Bus Shield-WiFi Shield on: April 07, 2014, 02:26:22 am

I have already done what it is you are trying to do for another client of mine. I cannot give/sell you the code as they own it but i can create something like it for you if you want. Take a look at my website foe an idea of what sort of projects I have taken on and drop me an email/PM if yo want to take this further. I should ask firstly however is this for a one off or the start of something commercial.

Cheers Pete.
159  Community / Gigs and Collaborations / Re: Feasibility and hardware design on: April 05, 2014, 12:37:29 pm
If you are only going to be wanting to go about 5 meters then why not simply go down the BLE route or even the NF low power transmitters ... you can buy the NRF  ( ) devices for a few $ and the BLE->UART bridges ( ) for about $7.

The BLE->UART bridge will not require any libraries and there a a few out there for the NRF devices.

Connect them up to a few Arduino Pro Minis  ( ) and you have a solution for < $50 for 3 nodes with a forth node  built up using the same combination and can be the bridge back to the PC using a USB->UART bridge ( ) to the Pro Mini. This same cable will serve as the programming interface for the Pro Minis during firmware development.

Cheers Pete.
160  Community / Gigs and Collaborations / Re: GPS-LCD Speedometer on: April 05, 2014, 11:29:31 am
Go read the examples that come with the Tiny GPS library that i pointed you at a few posts back. It will demonstrate how to extract the params from the NMEA strings that you need into variables. then , depending on the LCD library that you have you can "Print" to it like any other streaming device. you will also be able to clear the display and set the curser position.... this is really a very simple task if you do a bit of reading ..
161  Community / Gigs and Collaborations / Re: Paid project - help needed - tweeting accelerometer / gyro on: March 21, 2014, 06:46:32 am
Hi Stephen,

If you are still looking for help/direction on this then i can offer you some.

Take a quick look at my website for similar projects that I have worked on for other clients

I have just completed a twitter feed reader that puts tweets up on a matrix display scrolling them for reading. This uses a 3rd party twitter news feed  creator that does not require SSL. This system communicated through the GSM network, BLE and WIFI.

Cheers Pete.
162  Community / Gigs and Collaborations / Re: Wanted: Legitimate Arduino Programmer - Arduino -> XBEE on: March 21, 2014, 06:34:46 am
I have sent you an email

Cheers Pete.
163  Community / Gigs and Collaborations / Re: GPS-LCD Speedometer on: March 21, 2014, 06:28:38 am
If you use the TinyGPS ( library there is a ground speed option there that uses the NMEA string $GPVTG to calculate the Ground Speed
The sentence is broken up like below if you prefer to decode it yourself

Track Made Good and Ground Speed.


eg1. $GPVTG,360.0,T,348.7,M,000.0,N,000.0,K*43
eg2. $GPVTG,054.7,T,034.4,M,005.5,N,010.2,K

           054.7,T      True track made good
           034.4,M      Magnetic track made good
           005.5,N      Ground speed, knots
           010.2,K      Ground speed, Kilometers per hour

eg3. $GPVTG,t,T,,,,N,,K*hh
1    = Track made good
2    = Fixed text 'T' indicates that track made good is relative to true north
3    = not used
4    = not used
5    = Speed over ground in knots
6    = Fixed text 'N' indicates that speed over ground in in knots
7    = Speed over ground in kilometers/hour
8    = Fixed text 'K' indicates that speed over ground is in kilometers/hour
9    = Checksum

The actual track made good and speed relative to the ground.

x.x,T = Track, degrees True
x.x,M = Track, degrees Magnetic
x.x,N = Speed, knots
x.x,K = Speed, Km/hr

Hope this help a little

Cheers Pete.
164  Community / Gigs and Collaborations / Re: Position from encoders? Need help, will compensate! on: February 26, 2014, 05:24:16 pm
In a former life I used to be a toolmaker, so yes CMM is familiar to me.

I can "probably" help you with your coding requirments if you would like to expand on them a bit more.

Cheers Pete.
165  Community / Gigs and Collaborations / Re: Paid or collaboration assistance needed with an NRF24 project in London, UK on: February 14, 2014, 04:27:07 am

I am based in France but from the UK originally with a large UK based client base.

I have worked with these devices in the past . Most specifically on a prototype system for a USA based client that manufactured occupancy lighting systems for rest rooms "Tooshlights". Their system used the radios to report the sate of the booth back to a web based server system that was able to be viewed through a web interface to let clients know where there where vacant booths.

I have also just completed a project with a UK client to use these to send tweets from a twitter feed to multiple LED matrix displays in a venue.

Please take a look at my website and take a look at the projects that I have been involved in. If you think that I have the skills that you require then drop me a message here or at my email address (found on the website)

Cheers Pete.
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