rf remote circuit canswtitch on or off many things @ at time

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shashi bhushan

Joined: 25 Oct 2008
Posts: 1

25 Oct 2008 11:43 rf remote circuit canswtitch on or off many things @ at time

rf remote circuit can swtitch on or off many things @ at time example - my robotics both wheels switch @ a time

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banjo

Joined: 24 Dec 2005
Posts: 644
Helped: 118

27 Oct 2008 13:10 rf remote circuit canswtitch on or off many things @ at time

I assume you are asking how to do this. The typical answer is to use bit mapping. Let us assume that your rf remtoe is transmitting bytes. Then you set up a transmission scheme where a command byte is followed by a data byte. You can optionally add a CRC or check byte to the end for greater noise immunity.

The command byte informs receiver as to what action to take. In your case, it is motor control. Then in the data byte, you assign bit 0 to be the state of the right wheel, for example. Bit 1 could be the state of the left wheel. The remaining bits can control other motors or functions.

Since this data byte is available at exactly the same time, all motors change their state at the same time. The limitation of this scheme is that it takes greater time to send and decode this datastream. However, for motors this is not a major drawback because the transmission data rate is much higher than the reaction time of the motors.