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 Forum index » DIY Hardware and Software » Musical Interfaces
Boosting a sensor output voltage
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aerogramma



Joined: Feb 27, 2008
Posts: 156
Location: Roma, Italy - London, UK
Audio files: 13

PostPosted: Tue Jul 21, 2009 10:54 pm    Post subject: Boosting a sensor output voltage
Subject description: what would be the best way?
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hi all,
last night I've managed to succesfully use a sharp distance sensor as a controller on a cv input
(opening/closing filters, oscillators and so on)

The sharp sensor is powered by 5v and the output is never above 3v as is expected to.

I thought, perhaps naively, that I could include an amplifing stage after the signal to boost it into the 0-5v range

Am I wrong? And if not what would be a good way to amplify the signal?

(the rest of the design works at 9v)

thanks a lot for any help! Very Happy

aero
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slacker



Joined: Nov 18, 2007
Posts: 301
Location: England
Audio files: 11
G2 patch files: 1

PostPosted: Sun Jul 26, 2009 4:07 am    Post subject: Reply with quote  Mark this post and the followings unread

I've been playing around with these recently, I've come up with a simple circuit that adds a bit of boost as well as some other stuff.
It's posted here http://deathlehem.com/php/viewtopic.php?f=2&t=370

I don't know if it's good enough for what you want but it might give you some ideas. The first opamp stage adds the boost, and should be able to get the output up to 5 volts max. It won't go from 0 to 5 volts though, because it boosts the minimum voltage up a bit as well, I think you need something that can add some offset voltage if you want to get from 0 - 5 volts.
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