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Help-Remote Controlled Robot

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combogirl:
Guys, i have built a remote controlled remote controlled robot but the range of transmitter
is very short, It works at 29 Mhz,
Can anyone suggest me some way from which its range can be increased ? ??? ?

HDL_CinC_Dragon:
How about a little more information than that?

What receiver(RX)/transmitter(TX) are you using? Did you make the RX and TX circuits? Did you buy them pre-made? Whats there model number? How much power is going to the circuit?
these and other questions. The more we know, the more we will be able to help you ;)

combogirl:
Pre-made...works at 9 volt, Bought it from a friend, The receiver is fine, Robot runs with great speed.
But the transmitter its range is too short, Maximum range is 5 feet at plain ground, The signal becomes more weak if
there are obstacles... My whole project is hanging just because of that transmitter !  :-[

Soeren:
Hi,


--- Quote from: combogirl on August 08, 2007, 01:12:45 PM ---Pre-made...works at 9 volt, Bought it from a friend, The receiver is fine, Robot runs with great speed.
But the transmitter its range is too short, Maximum range is 5 feet at plain ground,
--- End quote ---
Sounds like your robot is either very electrically noisy, swamping the transmissions, or an embarrasing oops have set in... Nah, you did check the 9V battery for power, right?  ;)


--- Quote ---My whole project is hanging just because of that transmitter !  :-[
--- End quote ---
I'm very curious about how you descide that "the receiver is fine" and "the transmitters range is too short"?
(Since, somehow I don't think you know the transmitters ERP and the receivers sensitivity and range is what those two numbers achieve together).

To boost range:
Check voltage of 9V battery during a transmission.
Reduce EMI from robot (probably the main culpritt).
Enlarge antennas on both TX and RX, unless they're wavelength calculated.
Make a 1 transistor antenna amplifier for the receiver.

I assume the 2 parts come from an R/C-vehicle and if so, range must have been a tiny bit better 'till you installed it in your 'bot.

combogirl:
The receiver is fine because when i move near to robot it moves fine with great speed  :-X

Make a 1 transistor antenna amplifier for the receiver. How to do that ?  ???

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