RCX programmable brick : 988


Robotics / RCX / 988	987 \| 989

Subject:	Re: Interfacing Sharp's GP2D02 Distance Sensor to the RCX
Newsgroups:	lugnet.robotics, lugnet.robotics.rcx
Date:	Mon, 22 Jan 2001 03:10:14 GMT
Viewed:	964 times

Ralf Krause <lego-robotics@crynwr.com> wrote in message news:B691251F.ED3%nospam.krause.ralf@web.de... Michael, please tell me how you can write that the power can " ... provide 30 mA of power to operate other sensor electronics." As I 've tested it seems that you can't do so ... or I am totally wrong ...?? Nice work!! I guess I don't know where I got the 30mA right now. Most of this is based on the fact that I thought there was a 120 ohms in series with the 8V. At light loads (where I originally measured) this it is the case. However when you really load the sensor output down, it looks more like the resistor is 220 or maybe even 330 ohms. I just played with my RCX and can get about 15mA at 5V with new batteries. The circuit in the RCX is obviously not a simple resistor anyway. Sorry to have mislead you. I think I'll tinker around with the wording of my web pages. Too bad you need to use an output to power the sensor. Michael Gasperi

Message has 1 Reply:

		Re: Interfacing Sharp's GP2D02 Distance Sensor to the RCX
(...) I agree ! (...) How depressing. :-( (...) Of course ! But, it's possible to drive more then one of these sharps with one output. And shouldn't it be possible (without large effort) to use the input-power to multiplex some of the GP2D12 ? (...) (24 years ago, 22-Jan-01, to lugnet.robotics, lugnet.robotics.rcx)

Message is in Reply To:

		Re: Interfacing Sharp's GP2D02 Distance Sensor to the RCX
Hi, I asked this problem a few weeks (or months??? ... I don't know a what time ...) but nobody could help. I got the same following answer ".... the sensor takes 35 mA and this is to much for the RCX ..." but I couldn't understand this at this (...) (24 years ago, 21-Jan-01, to lugnet.robotics, lugnet.robotics.rcx)

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