<div dir="ltr"><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jun 5, 2017 at 6:49 PM, Joel Wirāmu Pauling <span dir="ltr"><<a href="mailto:joel@aenertia.net" target="_blank">joel@aenertia.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div style="font-family:verdana,sans-serif">I've installed several 3800's into Fibre Install van's attached to Inverters and LTE Dongles to provide in-van wifi. One has been going for the last 5 years without issue so spikes seem to be well tolerated. <br></div></div></blockquote><div><br></div><div class="gmail_default" style="font-size:small">There is the converse problem: I've recently had two USB hubs fail (serially) on a telescope system. My theory is that their 12V supplies really don't like to be fed 13.8V (to get rid of a pile of dongles and wires on the telescope, we replaced them all with a common regulated power supply that is at 13.8V, which is what most car batteries *actually* put out when fully charged). The hubs would have to dissipate a lot more power to keep the USB port voltages at spec'ed voltages, shortening the hub's lives.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Basically, while OLPC was carefully designed to be very tolerant of input voltage as Richard Smith pointed, many devices are not and you cannot presume no problems may occur.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Care is in order.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small"><br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div style="font-family:verdana,sans-serif"></div></div><div class="m_-9179197531912053855HOEnZb"><div class="m_-9179197531912053855h5"><div class="gmail_extra"><br><div class="gmail_quote">On 6 June 2017 at 09:51, Michael Richardson <span dir="ltr"><<a href="mailto:mcr@sandelman.ca" target="_blank">mcr@sandelman.ca</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Such an interesting thread.<br>
But, is the 3800 tolerant of spikes of 13.6V? Has anyone tried?<br>
I haven't many left :-)<br>
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