Remote Control Frequencies

A.C. fishing

Hello everyone!

I've volunteered to help out a student team that is designing a robot for a specific competition.(Not really school related)
Anyway, we need some way to remote control(via infrared) our BS2 robot.
The only allowable frequencies are 75 MHz, 27 MHz, and 49 MHz.

I saw the remote control in the Parallax store, but it seems to operate on a 38 MHz fequency according to the PDF with it.

Anyone have any ideas for a simple remote? How would the receiver circuit be rigged? What RCtime values(I presume that would be the kind of set-up)/ basic code?

I was thinking about possibly using my Microsoft 27 MHz wireless keyboard. would this be possible? Or are the signal codes simply too complex in such a device for the BS2 to easily handle?
Here's the documentation on my keyboard:
http://www.google.com/url?sa=t&ct=res&cd=1&url=http://download.microsoft.com/download/7/1/0/7100007f-bbb4-4e82-b911-6e295750bf0a/TDS_WirelessLaserDesktop5000_0704A.pdf&ei=p8fRR66EBpqEgwTh9JD-Ag&usg=AFQjCNFhz2pB36cFRZjGNglYwURC06nhiQ&sig2=AtTDGZZgFlMNZ8g0Bu0gZg

thanks,
ACfishing

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Somebody said...
-Never Underestimate the power of human stupidity.

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Bruce Bates

A.C. Fishing -

The frequencies you mentioned 75 MHz, 27 MHz, and 49 MHz are all generally recognized as RF frequencies, and are rarely used as infrared frequencies. You'd better check with the powers that be for the transmission method specifications.

Regards,

Bruce Bates

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Programming can't be all that difficult, it's nothing but 1's and 0's

A.C. fishing

Thanks Bruce-
What is the cheapest way I can buy/build an RF interface/controller to the BS2?

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Somebody said...
-Never Underestimate the power of human stupidity.

·

Phil Pilgrim (PhiPi)

Depending on what aspects of the robot you need to control (which you haven't told us), one solution could be to buy a hobby R/C transmitter and receiver. Hitec is one brand to look for, but there are many others. The output pulse widths from the receiver can be monitored and measured by the BASIC Stamp, using PULSIN. The rest is "just software".

-Phil

Bruce Bates

A.C. Fishing -

In the Rentron Remote Control area you can find both RF and I/R wireless solutions. Here is the link: http://www.rentron.com/PicBasic/RemoteControl.htm

Everything from soup to nuts

Regards,

Bruce Bates

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Programming can't be all that difficult, it's nothing but 1's and 0's

RickB

A.C.

In your first post you refered to both ir and rf. None of the freqs you mentioned are related to ir.
What form of communication do you really want to use.

Rick

Humanoido

The frequencies you mentioned have long been used in toys,
for control of toy cars in particular. These units contain both
the transmitter and receiver, and are multifunctional. Their
theory of operation is well defined and you could either get
a scrapped assembly at little to no cost, or homebrew one.
Some have more functions than others, so you'd need to decide
what is most suitable. This is one approach.

humanoido