12v from servo ports
OK, spent the morning reading about the servo ports.· On the BOE board, it appears you can set them to output raw power.· (Such as the 12v I have the board hooked to.)· However, I cannot seem to understand how this is done.· The center pin on the servo ports·appear to put out 12 volts nomatter how I set the pins in pbasic.· I have tried to research this question before I have posted....
All I am trying to do is get my standard 12V motor to go forward.
(You may have noticed I have a similar post here also.)· I am experimenting this week, because I have a little free time.· Sorry for all the questions.· I promise I have spent quite a bit of time answering many of these questions on my own before I ask....
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All I am trying to do is get my standard 12V motor to go forward.
(You may have noticed I have a similar post here also.)· I am experimenting this week, because I have a little free time.· Sorry for all the questions.· I promise I have spent quite a bit of time answering many of these questions on my own before I ask....
[noparse]:)[/noparse]
Comments
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Jon Williams
Applications Engineer, Parallax
I am aware of the jumper.· One protects the servos with regulated output(5v), I beleive.· However, I am trying to put the 12v directly through.
How do I switch the power off?· Setting pin·15 low, for example, does not seem to have an effect on it.
Thanks.
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Chris Savage
Parallax Tech Support
csavage@parallax.com
Dave
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Dave Andreae
Tech Support
dandreae@parallax.com
Http://www.parallax.com
Post Edited (Dave Andreae (Parallax)) : 1/9/2006 8:19:26 PM GMT
This is VERY different from "a standard 12 volt motor". Most servo's would be destroyed by 12 volts, for one thing.
Usually, to control a 'real' motor, you need some Pulse-Width-Modulation (PWM) source to control speed, and several transistors to route power to the motor. The servo connection is NOT going to do it.
Look up PWM and "H-Bridge". An "H-Bridge" is that set of transistors I was talking about.