Re: Driving servos from a PC
- From: shb*NO*SPAM*@comporium.net (Si Ballenger)
- Date: Fri, 15 Dec 2006 08:48:34 GMT
On Thu, 14 Dec 2006 17:14:20 +0000, Pete Verdon
<news@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
As part of a construction project for a charitable event, I need to
build a number of big analogue dials (like an old-fashioned voltmeter)
controlled by a series of PCs (each computer drives two dials). Accuracy
isn't critical, but I do have a fairly strict budget restriction.
One possibility seems to be to use an RC servo to move a big cardboard
needle. I've not used servos before, but a little research suggests that
the required position is commanded by altering the pulse width of a ~5v
50Hz square-wave signal a little either side of 2ms.
As I said, I don't have much of a budget. I also have limited
electronics knowledge. But is it totally unrealistic to consider
controlling these servos via a soundcard output? I envisage putting one
dial on each of the left and right channels, and getting the card to
spit out an appropriate wave-form to each of them. I realise this won't
be a proper square-wave, but am I likely to get close enough?
What else have I missed? Do you have another (cheap) suggestion, whether
involving servos or not?
A servo controller like below is your best bet.
http://www.pololu.com/products/pololu/0207/index.html
.
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- Driving servos from a PC
- From: Pete Verdon
- Driving servos from a PC
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