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gaurav khairkar
02-19-2010, 06:28 PM
hi.this is gaurav..i'm a newbie...........

i want 2 construct a wireless remote for a robot & i hav absolutely no idea where to start from.........
i need help...
:confused::confused:

pkshima
03-06-2010, 09:49 PM
You can go with either of the following 3 approaches...

1. IR based. just like the TV remote works. This needs a direct line of sight between the remote and bot.
2. RF based 1. Use DTMF chips along with FM radio transmitter and receiver.
3. Use RF modules with HT12D HT12E chips.

challenger
03-07-2010, 01:17 AM
cud you pls explain about the 2nd approach in detail.for begginers like me its something nearly understandable....do we get any ckt of it on net ? pls do reply:)

pkshima
03-07-2010, 01:43 AM
Here you go ...

http://www.electronic-circuits-diagrams.com/remotecontrolsimages/remotecontrolsckt5.shtml

Actually if you search the net you will find various designs around the same idea. So use google.

The concept is very simple, you convert 4 bit data to audio using chip UM91214 and transmit it using a FM transmiter.
Do the opposite on the receiving end i.e. receive using a FM radio receiver and then convert the audio to 4 bit data using chip 8870.

challenger
03-07-2010, 04:44 PM
Oh ok.I'll give it a try.Thank you:)

challenger
03-07-2010, 04:54 PM
is it better to solder myself on pcb or get the ready made one for transmitter and reciever

shobhitkukreti
03-07-2010, 05:26 PM
Get the whole project done from someone else. Even get it operated from another person.Without trying, you want to get a ready made module for transmitter, receiver. What is the hurry,start off slowly, learn how to solder, and then gradually move on to bigger things.

challenger
03-07-2010, 06:10 PM
ok ok i'll do it myself.i was a bit scared looking at the circuit :)

rao
03-07-2010, 06:27 PM
Get the whole project done from someone else. Even get it operated from another person.Without trying, you want to get a ready made module for transmitter, receiver. What is the hurry,start off slowly, learn how to solder, and then gradually move on to bigger things.

That made me laugh. :)

Rao

pkshima
03-07-2010, 11:29 PM
Actually that was a good question.
If I understand correct, you are worried about soldering the transmitter and receiver only.
If so, then you are 100% right, getting radio circuits right is VERY difficult.

So better buy FM radio transmitter(Rs. 35) and receiver(Rs. 75) ready made. But make rest of the circuit yourself.

shashak
03-08-2010, 02:23 AM
Sorry don’t take me as Digi 's sales guy, as in last posts i had insist people about using Xbee modules. But performance of Xbee module captivate me

It’s good to start with basics using dtmf, Rf module. But the xbee are definitely a great solution eventually most of people get on to. Price is bit high (@ ~1500 here in pune) but it’s a very good one time investment. Think about it.