Show Posts
Pages: 1 ... 9 10 [11] 12 13 ... 22
151  Community / Gigs and Collaborations / Re: need help with code for controlling a hydraulic press mode on: May 03, 2014, 08:10:48 am
Also you need to have some de-bounce on the counter pin if it is a mechanical switch or you will count the contact bounces as well giving false readings.
152  Community / Gigs and Collaborations / Re: Shirt-folding Robot -- Paid Guidance Wanted on: April 29, 2014, 03:22:52 am
Hello Henry,

Rather than trying to get an individual to do this why not just ask for advice here on the forums. There are a lot of people (like myself) who offer free advice and design ideas. I also charge for my time if you have a commercial product and require more than just a response in the forums.

I see this as having several parts. You have the mechanics of the folding machine. The drive for the mechanics. Then you have the control of the system. You will also be wanting to put some feedback into the system to be able to control it effectively. Then you would be well advised to also have some sort of safety systems in place like emergency stops etc.

Now you have the basic parts of the project identified you can start t think about the details. like how it is to be controlled. I.E. what is the Human Interface. Then you have to start sourcing parts to control and monitor the system such as motor controllers, switches to test for movement limits and positions and emergency stops etc.

Have a think about this a bit more and then come back here with some specific questions and I am sure you will get plenty of good advice.

Cheers Pete.
153  International / Français / Re: Demande d'information : arduino + motor shield on: April 25, 2014, 11:35:24 am
La réponse facile est "OUI"

The simple answer is "YES"

Cheers Pete.
154  Community / Gigs and Collaborations / Re: Need a program for Pulse Width Measurement with 1 microsecond resolution. on: April 21, 2014, 02:27:01 pm
Sure I can help you with this but first try taking a look at this http://interface.khm.de/index.php/lab/experiments/arduino-frequency-counter-library/ this library will count frequencies of up to 8 Meg on a 16 meg 328 MCU assuming a 50% duty cycle

you can get your 1 meg out using a divider on the Xtal for the MCU.

Cheers Pete.
155  Community / Gigs and Collaborations / Re: Paid Arduino Design and Development Contractor Position on: April 21, 2014, 02:05:25 pm
Hi,

I can help you with this project . I have taken a lot of "ideas" from concept through prototyping into production. I can offer custom PCB solutions as well as small (< 500) production runs. The only down side it that despite have a good USA based client list I live in and work from France.

If you think this is not a show stopper them please take a quick look at my website WWW.EmbeddedAT.com you will see there some of the types of projects I take on and the level of support and services that I can offer.

Please feel free to contact me at any point if you have any questions or simply just want a chat about your options.

Cheers Pete.
156  Community / Gigs and Collaborations / Re: Arduino Uno-Can Bus Shield-WiFi Shield on: April 20, 2014, 11:27:09 am
HI ... Is this still alive .. did you fine some one to work with yet ?

One option available to you is to set up the WiFi as an adhoc network and then you can navigate directly using any wifi enabled device to it and a webpage delivered by the device. If your webpage is then smart you can use httpgets to refresh the data on the page without the need to refresh the whole page. This is the basis of Jquery but i cut down simpler for that fit with the arduino single socket model.

Cheers Pete.
157  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.
158  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 http://www.adafruit.com/products/1096 4 units at $4.95

Using a remote control like this http://www.adafruit.com/products/1095 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.
159  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 WWW.EmbeddedAT.com If you think i can help you drop me a PM or an email and we can chat some more.


Cheers Pete.
160  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.
161  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.
162  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.
163  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.

                      WWW.EmbeddedAT.com

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

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.
165  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  ( http://www.ebay.co.uk/itm/271444747312 ) devices for a few $ and the BLE->UART bridges ( http://www.ebay.co.uk/itm/251310285396 ) 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  ( http://www.ebay.co.uk/itm/231191125386 ) 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 ( http://www.ebay.co.uk/itm/261395201974 ) to the Pro Mini. This same cable will serve as the programming interface for the Pro Minis during firmware development.

Cheers Pete.
Pages: 1 ... 9 10 [11] 12 13 ... 22