Show Posts
Pages: [1] 2 3 ... 72
1  Using Arduino / Project Guidance / Re: Interfacing the EZ Antenna Tracker with arduino. Suggestions? on: April 16, 2014, 07:38:53 am
What are these satillite recievers you mentioned? I remember looking at the digi m10 satillite module but it is being produced anymore.
This is not an endorsement, just an example.
This OrangeRX 8ch DSMX compatible receiver has connectors for two additional satellite receivers to increase connection resilience.  Satellite receivers for that one could be this, this, or this.

Similar modules probably exist for FrSky too, which has inbuilt telemetry.  You mentioned you have the Spektrum transmitter though.

Cheers ! Geoff
2  Using Arduino / Project Guidance / Re: Interfacing the EZ Antenna Tracker with arduino. Suggestions? on: April 16, 2014, 06:26:48 am
I'm currently using a spectrum rc transmitter and reciever. However if I want over 6 channels I'm going to have to pay a fortune
Hi Walter - that's true if you go for a genuine Spektrum.  8 channel Orange DSMX or other compatible can be bought even with a couple of satellite receivers favourably priced with Spektrum 4ch.

My only reason for suggesting telemetry rig (or, swap to FrSky with telemetry in transmitter/receiver) is I think you could do it simpler & cheaper than trying to stretch the range of the XBee.

Cheers ! Geoff
3  Using Arduino / Project Guidance / Re: How to program a CAN-BUS arduino shield to control the car's headlights? on: April 14, 2014, 07:25:42 pm
Ok I got it, thank you all for your efforts I really appreciate that. I will now begin to work on the relay thing and hope it works smiley-grin
No need to hope - it's sure to.

All the best with your project - Geoff
4  Using Arduino / Project Guidance / Re: Bluetooth SMD Module RN-42 Project on: April 14, 2014, 01:48:52 am
Hi,

The bluetooth module is a serial device.  Presuming you connect it to the Arduino's hardware RX/TX pins (bluetooth TX-Arduino RX & RX-TX) you can transmit data from the Arduino out the bluetooth module using standard Serial library commands like write, print & println.  If you use IO pins other than D0 & D1 then you'd use software serial, and those related commands will do the job.

There's a fair bit of info about if you google the topic.  I see this youtube video by Kevin Darrah talks through the various IO connections on that RN-42 module when he used it to setup a standalone Arduino for programming over bluetooth.

Note that module uses 3.3V logic so you'll need to make sure you have some translation circuitry in the middle so your 5V Arduino doesn't harm it. 

Cheers ! Geoff
5  Using Arduino / Microcontrollers / Re: [Q] Firmata on ATTiny85? on: April 12, 2014, 07:19:46 pm
Or go back to the Arduino Pro Mini.  It's the same width and 3mm longer than Digispark (comparing them side by side on my desk here with a ruler) and has a full ATmega328P.  Its' self-contained with power regulation, requires no assembly aside from headers if you want those, and it's cheap.

Easy as. Geoff
6  Using Arduino / Project Guidance / Re: How to program a CAN-BUS arduino shield to control the car's headlights? on: April 12, 2014, 08:48:58 am
could you please tell me more about the MOSFETs method you are talking about ?
Hi

What I meant was you can use a logic-level MOSFET to control the kind of power needed to be switched for your headlight circuit.  That would be best I think if you're completely rewiring your car's lighting circuit.  Another way would be to activate the existing headlight relay on the trigger side using a transistor or MOSFET.  That method will be better if you're keeping the existing driver controls for lighting intact.

Perhaps if you describe what you're looking to achieve it will help zero in on the better solution?

Geoff
7  Using Arduino / Project Guidance / Re: Arduino-NFC-Android on: April 12, 2014, 03:54:39 am
Hi

What you're suggesting isn't difficult over Bluetooth if you're looking to write an app yourself.  Bluetooth is just serial communications - and that's something that's both natively supported on Arduino and available via emulation if you don't want to use the hardware ports.

Cheers ! Geoff
8  Using Arduino / Project Guidance / Re: Arduino mega midi controller on: April 12, 2014, 03:09:05 am
Hi

I'm not so surprised you've gone a long time without a response to this question.  There's just so much info on Arduino and MIDI out there, and so much scope in what you might want to achieve.

Suggest you start with these two tutorials here and here from the Arduino reference pages to get the concepts then a google search of Arduino MIDI project will show what heaps of other folks have done with theirs.

All the best with your project, Geoff
9  Using Arduino / Project Guidance / Re: Bluetooth SMD Module RN-42 Project on: April 12, 2014, 03:03:50 am
Hi,

Can you provide a link to the particular RN42 module you're using?

Geoff
10  Using Arduino / Project Guidance / Re: Arduino Uno, Seeed Studio CanBus Shield-WiFi Shield on: April 12, 2014, 03:02:45 am
Hi,

A quick scan over the documentation on those two sheilds (I presume you mean this CAN bus and their new fi250 WiFi shield) they've covered themselves in glory for summarising the pins haven't they.  They're not even up at sheildlist.org.  Nevermind.

It appears the CAN bus shield uses the SPI interface, therefore on a Uno that's pins 13, 12, 11 as well as a chip select pin which in their example code seems to be D8.  The WiFi sheild uses serial for communication and they recommend the hardware port, therefore D0 & D1 so there's no clashes there.  So in answer to your first question, if my presumptions are correct the two shields will live happy together on your Uno.

As for the phone application it's pretty straightforward to construct apps for Android on several free sites.  I like the MIT App Inventor but you may find others you prefer.

If you are going to interface with a phone, WiFi probably wouldn't be my first choice but that's up to you.  MIT's app inventor has support for Bluetooth but not WiFi as far as I recall.  Other alternatives might do so.

I wouldn't write yourself off for doing this yourself.  This is far from rocket surgery - and you sound like you've got a firm grasp of the harder part of the project already.

Cheers ! Geoff
11  Using Arduino / Project Guidance / Re: Interfacing the EZ Antenna Tracker with arduino. Suggestions? on: April 12, 2014, 02:44:07 am
Hi,

If you're suggesting encoding the GPS info down the audio link of your FPV downlink then I presume you already have this on your robot?  If not, dedicated telemetry transmitters are typically cheaper than FPV downlinks, and operate at full RC transmitter range.  If you're not married to the xbee then you could consider upgrading the whole thing to RC radio (FASST/Spektrum/FrSky/whatever).  That would boost your range without the cost of an antenna tracker.

Interfacing to RC radio is not something I've done - but it might be worth a bit of a google.  Many of the digital transmitters are ATmega328P (or even less) based...so the interfacing to the transmitter modules won't be beyond an Arduino.

Geoff
12  Using Arduino / Project Guidance / Re: Using a keypad and to initiate a fingerprint sensor on: April 12, 2014, 02:20:44 am
Hi,

As you say, you've only got it calling getFingerprintIDez() the once at the end of starPressed().
Code:
  Serial.println("Waiting for valid finger...");

getFingerprintIDez();
To get it to hang about repeating that scan for 20 seconds, you could do something like this:
Code:
  Serial.println("Waiting for valid finger...");
  unsigned long timeNow = millis();
  while (millis() - 20000 < timeNow) getFingerprintIDez();
That should get you on your way smiley

All it does is stores the value of the millis() timer then stays in a loop repeating getFingerprintIDez() until millis() progresses 20,000 ticks past the stored start time.

Cheers !  Geoff
13  Using Arduino / Project Guidance / Re: IR Remote functionality on: April 12, 2014, 01:53:35 am
Hi,

There's heaps of info available right from the source of your boards.  Aside from the tutorials on those product pages, they have this very good article about iR communicaton with Arduino.  If you're still up for more reading, there's also a heap of goodness at Adafruit that takes you right from the very basics.

All the best with your project - Geoff
14  Using Arduino / Project Guidance / Re: How to program a CAN-BUS arduino shield to control the car's headlights? on: April 11, 2014, 09:51:56 pm
Hi,

Are you sure your car controls its headlights using CAN bus?  I'd heard of bulb failure detection using CAN bus so are you sure your car has that capability to tap into?  If your car doesn't have an OBD-II connector is it new enough to be running a CAN bus system?  If not, a simpler method using MOSFETs to control the headlights is possible.

Cheers ! Geoff
15  Using Arduino / Project Guidance / Re: Google drive + Wifi shield on: April 11, 2014, 09:45:31 pm
Hi,

I can see where the article might create a bit of confusion as the Processing environment (running on the PC) uses the same terminology in a lot of cases (eg calling programs "sketches") as the Arduino environment.  There's a good reason for that being Arduino's IDE and programming language while a flavour of C, is actually developed from Processing.  If you load Processing you'll immediately feel at home in the very familiar looking IDE as a consequence smiley

That article is not talking about anything on the Arduino that I can see.  It mentions a previous article where sensor readings from a light sensor are reported serially to the PC into Processing.  From that point, the story is all about setting up Processing on your PC to write to a spreadsheet on Google drive, not doing so directly from Arduino.

Java libraries aren't useful in your Arduino sketch, so you'll need to do all those steps on a connected PC.  Alternatively you could do it with a small embedded system like a Raspberry Pi attached to your Arduino to keep the size & power consumption down.

Hope that makes senses, cheers ! Geoff
Pages: [1] 2 3 ... 72