From: Dave H. <dhy...@gm...> - 2008-08-10 21:33:57
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Hi Kevin, > I have a robostix and a Maxbotix EZ3. > My issue is that when I connect my sonar directly to clean 5v power a get a > steady analog output on my DMM but when I use the robostix 5v and gnd my > readings swing wildly (both on DMM and on serial output from robostix). > > I had 3 ir sensors all connected which exhibited similar behavior but which > seemed to be a little more tolerant. > > My DMM tells me the AD voltage is 4.92v. What voltage are you feeding into the robostix? It really wants about 5.4v to get a nice 5v output. Also be aware that the voltage regulator on the robostix is limited to 500 mA. Some IR sensors (like the GP2D12) draw instantaneous currents of 200 ma, so hooking up alot of them may be overloading the voltage regulator. There's nothing wrong with using additioanl external voltage regulators to provide the 5v for your sensors. -- Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ |