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1  Development / Other Hardware Development / Re: 2.4 Ghz Wireless camera Receiver on: December 24, 2013, 12:14:13 pm
Thank You  smiley
How to find it? I didn't found any technical details about it. smiley-sad
2  Development / Other Hardware Development / 2.4 Ghz Wireless camera Receiver on: December 22, 2013, 11:58:57 am
Hi,
I have a wireless camera, similar to this model (http://www.ebay.com/itm/CA-Mini-Wireless-Nanny-Micro-Camera-Transmitter-with-Receiver-Full-Kit-/181283993849) . I lost the receiver module, is there any way to make a receiver for the camera transmitter. I have found that it is a 2.4Ghz communication. Does a similar models receiver or a 2.4Ghz video receiver satisfies the need??
Thanks  smiley
3  Topics / Product Design / Interfacing PIR module for security system on: July 23, 2013, 07:43:33 am
Hello All,
I'm planning to make a security system in my home with PIR modules and Arduino. I want to place PIR module at all the sides of home. My doubt is can we run the wire connection for these PIR module to different positions of my home through the electrical wiring pipes?? so that i can put a single controller for all the sensors.Is there any interference problem?? Is there any chance to get my circuit damaged. All the sensors are running at 5V with the power supply circuit near the controller.

Thank You
4  Development / Other Software Development / Re: Smartcard access library on: July 18, 2013, 01:50:42 pm
Ya Angus, you really helping me a lot....I'll surely update you the progress.....
Thank you
Prem
5  Topics / Product Design / Interfacing with a Telephone line on: July 16, 2013, 09:01:58 am
Hi everyone,

I need to dial a number through telephone lines and send some DTMF frequently through the telephone line to the dialed number with a microcontroller. Is there any single chip telephone IC available which can be easily interfaced with arduino, just like the old dial up modem which i can dial number from a PC. Help me to get the simplest and cost effective way to do this.

Thank You
Prem
6  Development / Other Software Development / Re: Smartcard access library on: July 14, 2013, 10:54:03 am
Hello Angus,

Thanks for your replay, i was checking the things you said. You explained things very nicely. This library works perfect for SIM cards, Thanks a lot.....  smiley smiley
without any interfacing IC you said, i'm able to connect the sim card directly to the arduino and getting the ATR response. I'm attaching the screenshot plz check it, is that working correctly??
I have some doubts...
I want to read the complete phone book and the messages stored in the sim card and save in a memory card(not needed to display as characters in the mmc file just want to dump as a cache)and then write this to another sim card. Is it possible with this library?  how to access the phone book and the message stored location in the sim card?? and which function is used to write thing to the sim card?
7  Using Arduino / Interfacing w/ Software on the Computer / Re: SimCard Electrical Specification on: July 10, 2013, 02:22:08 am
Thanks for your replay, I have checked the link, but its all general information about the sim cards, I want to know the specification(mainly the supply voltage) of the sim cards used in India.
8  Using Arduino / Interfacing w/ Software on the Computer / SimCard Electrical Specification on: July 10, 2013, 01:03:18 am
hello,
I'm working with some sim card interface circuits. I'm from India i want to know is the electrical specification of sim card are the same for all countries?? and also what is the electrical characteristics of sim cards and which class it belongs? and is there 5V tolerance already in sim cards in India?
9  Topics / Robotics / Inverse Kinematics for Hexapod on: June 24, 2013, 01:34:22 pm
Hello everyone,

        I'm making a hexapod with 3-DOF leg, i have made the mechanical assemblies. But the confusion is that ho to implement the Kinematics, I searched a lot, bt since i don't have a basic knowledge in kinematics, i'm not getting understood it even i have spent a lot of time for it.  please help me with a code or something like that to make my hexapod work.
Thank you
10  Using Arduino / General Electronics / Re: Can we use 3.579545MHz crystal instead of 3.57MHz on: May 03, 2013, 09:42:18 am
Thank you all smiley
I checked it, the circuit i saw, the  INH and PWDN pins are grounded, i just removed that ground connection and made it open bcoz i read that there are internal pull down resistors for that pins, now when i removed that connection and as floresta told i reduced the input amplitude now it is working good. smiley
11  Using Arduino / General Electronics / Can we use 3.579545MHz crystal instead of 3.57MHz on: April 30, 2013, 06:16:37 am
I'ma making a cellphone controlled land rover with MT8870 DTMF decoder IC, but it is not woking,i'm using 3.579545Mhz crystal,but i saw in many circuits, the MT8870 is given 3.57MHz crystal, is there any issue in using 3.579545Mhz??
Thank You smiley
12  Using Arduino / Sensors / Re: Interfacing an EMF detector on: April 11, 2013, 09:26:44 am
Thank you Grumpy_Mike the problem got rectified with your replay #6, i made a small change, used a 1M pull down resistor instead of 10k, it worked.
Thank you all for your valuable replays  smiley
13  Using Arduino / Sensors / Re: Interfacing an EMF detector on: April 08, 2013, 12:15:07 am
I have checked the sketch based on internal comparator,but i'm doing a wire following robot with this emf detector, so i need a value from two emf detectors placed on the right and left side of the robot and compare these value and move along the wire just like a line following robot, so i need a value from each sensor based on the amount of flux linked with each antenna.
in the circuit i told above i'm not using 9v, i connected the 5v from arduino , the screenshot of the value got when i read using analogRead is attached here.
it is fluctuating, it is not solved yet smiley-sad
14  Using Arduino / Sensors / Re: Interfacing an EMF detector on: April 07, 2013, 12:25:05 pm
when i'm continually applying EMF to the circuit and reading the analog value from the value i got i fluctuating like this
value=39
value=37
value=45
value=50
value=37
value=49
value=75
value=50
value=49
value=99
value=153
value=182
value=218
value=227
value=1023
value=1023
value=1023
value=1023
value=1023
value=1023
value=1023
value=1023
value=1023
value=490
value=209
value=91
value=54
value=45
value=44
value=42
value=38
value=367
value=432
value=383
value=359
value=349
 after showing that 1024 value it suddenly changes to a lower value and then increase again, y is it o??plz help
 
15  Using Arduino / Sensors / Re: Interfacing an EMF detector on: April 07, 2013, 12:13:10 pm
Yes, i have connected the negative to the arduino.
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