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1  Using Arduino / Project Guidance / Re: light barrier for airplanes on: August 29, 2014, 12:48:44 am
Yes. Ultrasonic may work, but not using the cheap modules that you see listed on eBay

I have one of those modules and its range is only around 2m

These are supposed to be better 

http://www.ebay.com/itm/Imported-Arduino-SRF01-ultrasonic-distance-sensor-TTL-serial-/271294372649?pt=Radio_Control_Parts_Accessories&hash=item3f2a679b29

but I've not used on myself

Radar module looks cheaper

Thx for the link and yes the radar is still cheaper. However I know someone who has a MB7360 HRXL-MaxSonar costs around 100$. Very expensive but I give it a try to see if it works at all.

Andy
2  Using Arduino / Project Guidance / Re: light barrier for airplanes on: August 29, 2014, 12:28:23 am
Use a Doppler radar module

Search ebay on. Doppler radar module

There are some very cheap ones, but I think you need external hardware to condition the signal, I know this has been discussed before on this forum.

If you look further down on the eBay listing, there are some devices which are intended to be used as detectors for alarms, which mount to the ceiling, which look like they may fit the bill.

You would probably need to mask the viewing area that the module was detecting over, e.g by making a rectangular metal horn so the unit was only detecting over a narrow area

Note, this will take some experimentation before it would work, as I can see some possible issues with reflections in the horn.

Perhaps someone else on the forum has experience with radar that could advise on feasibility

Thx a lot didn't know that there are so small modules out there could be interesting!

How about Ultrasonic Range Finder are they fast enough to detect a 1m by 30cm object flying with 50km/h over it?

Andy
3  Using Arduino / Project Guidance / Re: light barrier for airplanes on: August 28, 2014, 06:01:40 am
Could you shine a bright light upwards (wide beam - not a laser) and have several photodetectors so that any one of them would detect a reflection from the airplane.

...R

yes could be possible but how does this handle the sunlight?

Andy
4  Using Arduino / Project Guidance / Re: light barrier for airplanes on: August 28, 2014, 05:35:05 am
I could make it solid like a U out of wood.

Andy
5  Using Arduino / Project Guidance / light barrier for airplanes on: August 28, 2014, 04:52:25 am
Hy

I got some pylons around 3 meters high and it is similar to redbull airrace where you fly between those pylons.
The time gets measured when you enter the circuit and when you got out through the same gate. The difference
then is the time you needed for the course.

Now I like to trigger the clock with a light barrier but how can you do that over 3 meters height? Since not
everyone is crossing the two pylons at exact the same height? With laser you would need several at different
height, sonar is probably to slow and wide??? What else exist out there?




Andy
6  Using Arduino / Networking, Protocols, and Devices / Arduino and the adf7012 on: June 13, 2014, 03:06:47 am
Hy there

Has someone already used a adf7012 togehter with an Arduino?

Thx
Andy
7  Using Arduino / General Electronics / Re: Instead of IR transmitter / receiver, wire directly? on: April 18, 2014, 06:31:33 am
I use a "small" Quadrocopter to do some aerial filming. It has two cameras on board.
The video Switch is there to get both Images in a PiP mode or switch between one or another camera over my Remote Control.
An Arduino is now sensing the values from the transmitter and sends the IR pulses to de Video switch.
This was a test flight with the video Switch:
https://www.youtube.com/watch?v=pu4scjeRMT4

Andy
8  Using Arduino / General Electronics / Re: Instead of IR transmitter / receiver, wire directly? on: April 17, 2014, 06:50:40 am
thx for the ideas.
The problem this device is flying smiley And the space for an IR LED and Receiver is just to small to fit in.

I will try to do it with a digital pin. Before I use the IRremote.h library to control the board with those commands:

#define MENU       0x4FB906F
#define MODE       0x4FB02FD
#define ENTER      0x4FB8877
#define ARROWUP    0x4FBF807
#define ARROWDOWN  0x4FB6897
#define ARROWRIGHT 0x4FBA857
#define ARROWLEFT  0x4FBD827
#define MODE1      0x4FB32CD
#define MODE2      0x4FB20DF
#define MODE3      0x4FB00FF
#define MODE4      0x4FB50AF
#define MODE5      0x4FB7887
#define MODE6      0x4FB708F
#define MODE7      0x4FB58A7
#define CH1        0x4FB38C7
#define CH2        0x4FB28D7
#define CH3        0x4FBF00F
#define CH4        0x4FB30CF

Andy
9  Using Arduino / General Electronics / Re: Instead of IR transmitter / receiver, wire directly? on: April 17, 2014, 05:29:46 am
can't use serial since the other device (video switch) has just an IR Receiver...

Andy
10  Using Arduino / General Electronics / Re: Instead of IR transmitter / receiver, wire directly? on: April 17, 2014, 02:25:31 am
hmm thx for the reply's.. Sounds a bit too complicated... But I will give it a try

Andy
11  Using Arduino / General Electronics / Instead of IR transmitter / receiver, wire directly? on: April 16, 2014, 06:13:57 am
Hy

I currently use an Arduino to control a device over an IR LED.
Is it possible to use two wires directly from the Arduino
output to the IR of the device and use the same code I used
before to control it via the IR LED?

Andy
12  Using Arduino / Sensors / MAX11200 ADC on: March 12, 2014, 02:31:43 am
Hy

I like to use the MAX11200 with an Arduino and like to ask if someone has already made a library for the Arduino.
Or can someone help me to get it working with an Arduino.

Thx
Andy
13  Using Arduino / Installation & Troubleshooting / Re: Upload sketch to Arduino Nano without USB (via ISP?) on: November 12, 2013, 05:26:07 am
You might be able to do a little basic troubleshooting if you have access to a digital multimeter. The USB +5vdc is isolated from the board's 5vdc bus by a diode D1. See if after you plug in the USB if you have +5vdc on the anode side of the diode but not on the cathode side which would indicate an open diode.

 As far as using the ISP method of programming the arduino board that is pretty simple using a hardware programmer or another arduino board running the arduinoISP sketch and then using the IDE's file menu option of upload sketch using programmer option.

Lefty

Hm ok I got an Open Diode....
What happens when I remove it?
Can I still use the Nano?

Andy
14  Using Arduino / Programming Questions / Re: How does define work? on: March 04, 2013, 06:41:22 am
thx a lot to all of you explaining me the problem and the difference among the const and define statement!!!

Andy
15  Using Arduino / Programming Questions / Re: How does define work? on: March 04, 2013, 05:44:37 am
wow thx a lot

so const is similair to define you still can't change the value after it is "defined" in the code?

Andy
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