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 Question about using external H-Bridges
 
 9/23/2007 9:41:31 AM
AeGis
3 posts


Question about using external H-Bridges

Hey guys, I have a question regarding interfacing external H-bridges from the serializer. Wondering if anyone would know the exact type of waveform that is being output from the L-PWM and R-PWM pins. I don't really have an oscilloscope on me to measure the voltage, so i can't tell if its a variable analog voltage or a PWM waveform. So far i measured the voltage levels with a DMM and it seems that the dc component is about 0.392 V per increment of 10pwm. Reason I'm asking this is I need to interface an external H-bridge which is designed to take an analog voltage input from 0-5V DC to control the pwm of each motor - so i will probably need to have a low pass filter if its a pwm output from the pins. If anyone can provide a bit more insight on this, it'd me much appreciated. 

Thanks in advance.

 

 9/23/2007 1:12:02 PM
ringo
36 posts


Re: Question about using external H-Bridges

It is 0-5V 10khz PWM, so you will need to low pass filter it with an RC.

RIngo

 


Ringo Davis, Hardware Technical Lead RoboticsConnection.com
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