 | | Re: Voltage Sensor —Horst Lehner
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| | | Hello, (...) This idea, while in itself interesting, will not work when the 12V battery gets regulated down to 9V. This is because these 9V will barely vary across the regulator's permitted input range. If of course the regulator is specifically (...) (22 years ago, 16-Sep-02, to lugnet.robotics)
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| | | | | Re: Voltage Sensor —Tom Beattie
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| | | | | (...) It's amazing when you get a different perspective on a problem! While not really applicable for this application the idea is indeed very elegant and saves on a precious input port. I have a spare regulator which I will modify to test this out. (...) (22 years ago, 17-Sep-02, to lugnet.robotics)
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| | | | | | | Re: Voltage Sensor —Horst Lehner
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| | | | | | Hello Tom, (...) Yes. You need a low impedance output driving 0..5V into the RCX, thus overriding its internal pullup. (...) Actually, I should have written "resolution" instead of "accuracy". The 10..15V range spans 5V with 256 steps, giving you a (...) (22 years ago, 17-Sep-02, to lugnet.robotics)
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| | | | | | | | Re: Voltage Sensor —Horst Lehner
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| | | | | | Hello again, if you have difficulties making sense out of my previous posting, try viewing it with a fixed-width font. Otherwise all fomulas will ook scrambled. In the Web interface, "view raw message" is likely to work for that purpose, but of (...) (22 years ago, 17-Sep-02, to lugnet.robotics)
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| | | | | | | | Re: Voltage Sensor —Tom Beattie
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| | | | | | (...) Wow, thanks Horst. Your last email had 'weekend project' written all over it. Everything was quite straight forward (including the equations) and extremely well presented. I'll keep you posted on how it goes, and if I get stuck, no doubt you (...) (22 years ago, 18-Sep-02, to lugnet.robotics)
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| | | | | Re: Voltage Sensor —Philippe Hurbain
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| | | | Caution: the your external supply has one side connected to RCX ground, which is itself connected to sensor input connector right side. Whichever circuit you choose, you will have to make sure that sensor connector will not be reversed (the (...) (22 years ago, 17-Sep-02, to lugnet.robotics)
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