Sharp analog ranger question

Sep 09, 2003 1 Replies
D

Greetings,



I've got an application where I'm turning a Sharp GP IR range finder on for a short period of time, taking its reading and then turning it off. Though the spec sheets for these things say that the output for the first reading is ready a maximum of 53.3ms after power up, I'm not getting good readings. Has anyone else experimented with these guys and have any suggestions for power up and delay until reading their output? I know that I get good readings at 85ms, but not at 50ms, I've not done a complete margin test yet. Any comments out there?



regards, DLC


============================================================================ * Dennis Clark dlc@frii.com www.techtoystoday.com * * "Programming and Customizing the OOPic Microcontroller" Mcgraw-Hill 2003 * ============================================================================
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L

[...]

I may be nitpicking, but 50ms < 53.3ms, so test it at 55ms before complaining that it doesn't work :)

BTW, how accurate is your time measurement? When you say 50ms, is that

50 +/- 5%? Could it be you're really measuring, say, 47.5ms after powerup?
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