 | | Custom sensor current drain - use two sensor ports?
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I'm building a custom active mindstorms sensor, but it requires 28mA to operate, while the sensor port only provides about 15mA. Any advice? (The mA requirements of the sensor cannot be halved - improvements may be possible, but it seems unlikely I (...) (19 years ago, 30-Jun-05, to lugnet.robotics.rcx)
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| | Re: Custom sensor current drain - use two sensor ports?
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Maybe you could use one of the output ports. It might be worth running the sensor schematic by some of those on the board, while I understand the need to keep things under your hat - others may be able to suggest ways of bringing its consumption (...) (19 years ago, 30-Jun-05, to lugnet.robotics.rcx)
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| | Re: Custom sensor current drain - use two sensor ports?
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Hi Justin, (...) No, the internal circuis are more or less the same. (...) I don't think you could break something. But of course using two input ports is not so great... (...) You might try the kind of trick I used for my GP2D12 sensor ((URL) store (...) (19 years ago, 30-Jun-05, to lugnet.robotics.rcx)
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| | Re: Custom sensor current drain - use two sensor ports?
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(...) I take it all back. I'm so brilliant that I found a way to make a (rather large) change to the circuitry that brought things under the limit. Ok, ok, forgive my indulgent self-back-patting, but I'm pretty bouyant right now - everything is (...) (19 years ago, 30-Jun-05, to lugnet.robotics.rcx)
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| | Re: Custom sensor current drain - use two sensor ports?
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On Thu, June 30, 2005 6:53 am, Justin said: (...) ... (...) I love it when this happens. Unfortunately, it usually leads to this: (...) Congradulations on your breakthrough. Steve (19 years ago, 30-Jun-05, to lugnet.robotics.rcx)
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(...) Nice!!! I hope you'll publish your work ;o) Philo (19 years ago, 30-Jun-05, to lugnet.robotics.rcx)
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(...) Wow cool, where are you going to obtain radioactive material (legally and without gettting in trouble with the authorities) to test your counter? :) (19 years ago, 30-Jun-05, to lugnet.robotics.rcx)
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| | Re: Custom sensor current drain - use two sensor ports?
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(...) Uranium or thorium ores are easily found in mineralogic collections... very nice radio-sources ;o) Of course precise calibration is another story! See for example (URL) (19 years ago, 30-Jun-05, to lugnet.robotics.rcx)
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| | Re: Custom sensor current drain - use two sensor ports?
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(...) As Philippe noted, there are various legal sources, but even without a source there is always natural background radiation to look at, so one idea I have is a device that records the local background level with a sliding pen on a rotating (...) (19 years ago, 30-Jun-05, to lugnet.robotics.rcx)
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| | Re: Custom sensor current drain - use two sensor ports?
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(...) Much easier than that - run down to the local camping store and buy some gas lantern mantles. Unless they've changed something in the last five years or so, they incorperate a reasonable amount of Th-232 which makes geiger counters click (...) (19 years ago, 30-Jun-05, to lugnet.robotics.rcx)
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(...) Agreed... but it would be a nice experiment basis! Philo (19 years ago, 30-Jun-05, to lugnet.robotics.rcx)
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| | Re: Custom sensor current drain - use two sensor ports?
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(...) Also you are likely to get a reasonable reading from Smoke detectors - though please dont dismantle the one that could save your neck! Danny (19 years ago, 30-Jun-05, to lugnet.robotics.rcx)
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| | Re: Custom sensor current drain - use two sensor ports?
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(...) Watches with glow-in-the-dark spots on them are a radioactive source. Brian Nielsen (19 years ago, 7-Jul-05, to lugnet.robotics.rcx)
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