From: ken s. <ken...@gm...> - 2006-11-07 23:52:26
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On 11/7/06, Dave Hylands <dhy...@gm...> wrote: > Hi Chris, > > On 11/7/06, Chris Evans <roo...@gm...> wrote: > > Curioser and curioser... > > > > I thought that before I tried what you said I would remove the tweener board > > and see if somehow that was causing part of the problem. My normal setup is > > robotstix -> tweener -> gumstix -> wifistix. I plug 5v into the tweener and > > everything works. When I remove the tweener now, nothing will boot. The blue > > led on the robostix doesn't even flash (although all the green leds are lit) > > and the wifistix never comes online. > > Whenever you use a robostix, you always need to at least provide power > to the robostix. Normally, any of the power jacks is V_BATT and it > doesn't matter which onw you plug into, since they're all connected > up. > > Since the robostix will often be powered from batteries, and V_BATT > can't exceed about 6v, the power jack on the robostix is called > V_ROBOBATT, and it goes through a 5v regulator to become V_BATT. This > allows a 9v battery to be used to power the robostix & gumstix. pictorial view... http://pubs.gumstix.org/documents/Powering_a_Gumstix.pdf |