<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">Anyone try those ultrasonic rangefinder ‘ping’ devices? Were you able to get any precision from them? I have mine pointed at a still pool of water, and get the following results:</div><div class=""><br class=""></div><div class=""><div style="margin: 0px; font-size: 10px; line-height: normal; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">got request from : 0x1: humidity % = 74.94, temp C = 29.42, height cm = 195</span></div><div style="margin: 0px; font-size: 10px; line-height: normal; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">got request from : 0x1: humidity % = 75.30, temp C = 29.43, height cm = 172</span></div><div style="margin: 0px; font-size: 10px; line-height: normal; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">got request from : 0x1: humidity % = 75.57, temp C = 29.42, height cm = 173</span></div><div style="margin: 0px; font-size: 10px; line-height: normal; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">got request from : 0x1: humidity % = 76.06, temp C = 29.44, height cm = 173</span></div><div style="margin: 0px; font-size: 10px; line-height: normal; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">got request from : 0x1: humidity % = 75.20, temp C = 29.53, height cm = 173</span></div><div style="margin: 0px; font-size: 10px; line-height: normal; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">got request from : 0x1: humidity % = 75.06, temp C = 29.56, height cm = 143</span></div><div style="margin: 0px; font-size: 10px; line-height: normal; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">got request from : 0x1: humidity % = 75.56, temp C = 29.56, height cm = 172</span></div><div style="margin: 0px; font-size: 10px; line-height: normal; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">got request from : 0x1: humidity % = 76.20, temp C = 29.59, height cm = 172</span></div><div style="margin: 0px; font-size: 10px; line-height: normal; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">got request from : 0x1: humidity % = 76.90, temp C = 29.61, height cm = 145</span></div><div style="margin: 0px; font-size: 10px; line-height: normal; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">got request from : 0x1: humidity % = 77.80, temp C = 29.64, height cm = 145</span></div><div style="margin: 0px; font-size: 10px; line-height: normal; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">got request from : 0x1: humidity % = 77.67, temp C = 29.65, height cm = 172</span></div><div style="margin: 0px; font-size: 10px; line-height: normal; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">got request from : 0x1: humidity % = 75.59, temp C = 29.66, height cm = 166</span></div><div style="margin: 0px; font-size: 10px; line-height: normal; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">got request from : 0x1: humidity % = 76.22, temp C = 29.73, height cm = 143</span></div><div style="margin: 0px; font-size: 10px; line-height: normal; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">got request from : 0x1: humidity % = 76.74, temp C = 29.83, height cm = 172</span></div><div style="margin: 0px; font-size: 10px; line-height: normal; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">got request from : 0x1: humidity % = 76.16, temp C = 29.88, height cm = 165</span></div><div style="margin: 0px; font-size: 10px; line-height: normal; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">got request from : 0x1: humidity % = 76.09, temp C = 29.94, height cm = 172</span></div><div style="margin: 0px; font-size: 10px; line-height: normal; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">got request from : 0x1: humidity % = 75.67, temp C = 29.94, height cm = 167</span></div><div style="margin: 0px; font-size: 10px; line-height: normal; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">got request from : 0x1: humidity % = 76.20, temp C = 29.95, height cm = 167</span></div><div style="margin: 0px; font-size: 10px; line-height: normal; color: rgb(245, 245, 245); background-color: rgb(0, 0, 0);" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">got request from : 0x1: humidity % = 76.61, temp C = 29.96, height cm = 174</span></div><div class=""><br class=""></div><div class="">That’s pretty bad, in my opinion. I’m wondering if it’s due to running it on 3.3v? I know it’s spec’ed for 5v. I was hoping to use 3.3v so I could use a solar charged 3.7v LiPo cell, but I suppose I could switch over to a 6v lantern battery and use one of the circuits here: <a href="http://forums.pa" class="">http://forums.pa</a><a href="http://rallax.com/discussion/152308/ping-sensor-3-3v-compatible" class="">rallax.com/discussion/152308/ping-sensor-3-3v-compatible</a></div><div class=""><br class=""></div><div class="">Lantern battery isn’t rechargeable, but an Energizer-brand alkaline is rated for 56 Ah, so that ought to last a long time.</div><div class=""><br class=""></div><div class="">Alex</div><div class=""><br class=""></div><div class="">|\ | (¯ \/ |¯\ |V| |\ ¯|¯ |¯) | \/ | | | |¯\ (¯ /¯ /\ |V|</div><div class="">|-||_ (_ /\ |_/ @| | |-| | | \ | /\ |^| | |_/ (_ . \_ \/ | |</div><br class=""><br class=""><br class=""><br class=""><br class=""><br class="">
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