Author Topic: Sabertooth compatible Gyro  (Read 2767 times)

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Offline simplistikTopic starter

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Sabertooth compatible Gyro
« on: November 04, 2011, 10:43:53 AM »
I'm looking for a Sabertooth 2x25 compatible Gyro to correct over-steering in my robot, unfortunately after many emails over a few months I have yet to get a response from D.E.
I'm running 24vdc to the sabertooth in an rc mode , if at all possible id like to be able to add a gyro without adding a microprocessor.Is there something that can sit between the receiver and sabertooth?
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Offline newInRobotics

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Re: Sabertooth compatible Gyro
« Reply #1 on: November 04, 2011, 03:22:11 PM »
Quote from: simplistik on November 04, 2011, 10:43:53 AM
I'm looking for a Sabertooth 2x25 compatible Gyro to correct over-steering in my robot, [...]
There's no such thing as Sabertooth 2x25 compatible Gyro.

Quote from: simplistik on November 04, 2011, 10:43:53 AM
I'm running 24vdc to the sabertooth in an rc mode , if at all possible id like to be able to add a gyro without adding a microprocessor.
Not possible, as there has to be something to interpret data provided by gyro.
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Offline georgeecollins

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Re: Sabertooth compatible Gyro
« Reply #2 on: November 05, 2011, 03:01:56 AM »
Actually technically I think you can use a gyro with a sabre-tooth speed controller without a microprocessor.   If you use the gyros designed for R/C helicopters their output is actually a pulse width frequency.  You can find them on Tower Hobbies and I have experimented with them.  They are designed to change the speed of a helicopter tail rotor ESC through pulse width modulation to keep the helicopter pointing straight relative to a control direction that comes from a transmitter.  So they take a PWM input and give a PWM output that is modified by the gyro.  You could use that PWM output to control the speed of an ESC or even a mixing channel on a dual ESC. 

I can't think of a way you could use that property to help control oversteer on a driven robot easily.  So yeah, I think you would want a microprocessor. 
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