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20th December 2006, 08:15 AM
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 A microcontroller based, digital speed control system for d.c. motors Can anyone be kind enough to help me with a circuit for an Electronic Speed Controller (ESC) that will accept a PWM signal to control the speed of some DC motors? Whereby the ESC will use PWM from a microcontroller to control the speed of the motors, so that it could be used for a mobile robotic platform avoiding/stopping before obstacles. Thanx. | |
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20th December 2006, 12:29 PM
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Do you really mean that you are in need of a drive circuit, like an H-Bridge to DRIVE a motor from PWM? I'm confused.
__________________ "Everything that is done in the world is done by hope." -Martin Luther "There are two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle."-Albert Einstein | ||
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2nd January 2007, 05:52 AM
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| It sounds like he wants to know how to control a commercail RC ESC with a microcontroller. Instead of building his own H-Bridge, etc... I am faced with this same problem for a robot I am building. It is much simpler to work with a commercial ESC instead of building my own. I have had some success with a Novak Explorer II, I can successfully accelerate, idle, and brake the ESC from the microcontroller. It has BEC so I actually get the power for my microcontroller from the ESC. It works out nicely. | |
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5th January 2007, 12:52 PM
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You're right, what i'm actually trying to do is to interface the SRF04 sonar input to control the RC car. So that it doesn't bump into an obstacle in front of it. I would like to use a PICmicro, interface it to the SRF04 which gives out a PWM by the way, which'll inturn control the ESC that accepts PWM as input. This should allow the flexibility of running a couple of programmed routines to control the Car, depending on an input from the user, such as to automatically follow a moving object using the sonar, stopping for an obstacle at a specified distance from it, etc. as modes of operation. | ||
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8th January 2007, 01:36 PM
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| actually the microcontroller should have a program in it, so that it can be used in a toy car to follow an object in front or avoid an obstacle, etc depending on what routine in the uC is being used. a sensor like the SRF04 can be used. I've attached this url for some info on the srf: www.robot-electronics.co.uk/htm/srf04tech.htm thx | |
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8th January 2007, 01:37 PM
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Hi Analog actually the microcontroller should have a program in it, so that it can be used in a toy car to follow an object in front or avoid an obstacle, etc depending on what routine in the uC is being used. a sensor like the SRF04 can be used. I've attached this url for some info on the srf: www.robot-electronics.co.uk/htm/srf04tech.htm thx | ||
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