Archive for May, 2009
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Checking the mask on a $1700 light box as we prepare to etch our largest board ever. -
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20 minutes under the fluorescence. -
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Cotton swabbed & drainoed. Only 1/2 the bottom of the container was draino. Not bad for the world's cheapest laser printer. -
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The big boy's chemistry set. FeCL claimed its first spoon. The water still had carwash from its container's former life. -
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Another masterpiece. Now all our UAV's will probably get converted to SMT boards to increase flight time. -
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CU of a resistor -
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All the parts we could afford in May. It has spare pads to support GPS instead of sonar. 32x30mm of required area. Those 2 traces at the top were busters to etch. It'll use umbillical cords to avoid drilling holes.
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Decided to also tin the chip using the Nate method in addition to tinning the board. It's not tinned in China. -
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The Canon is good at showing what's going on with your soldering. -
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After the heat gun, everything is centered & bonded. Could not get the same result with the other boards because their chips weren't tinned. -
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16x19mm. Slightly larger than the $parkfun boards. People who grind fiberglass boards like these right here have shorter life expectancies. They also tend to drive tiny roadsters at 100mph, drink lots of alcohol, & do drugs like Henry Nicholas. -
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Pile of rejects. -
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1 spare chip
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10 minute exposure. 60 minutes of too diluted draino -
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The mane risk with ferric chloride is not spilling it, etching the sink, drinking it, or touching it, but dropping an object into it & splashing it in your eyes. The vapors R also real nasty on contact lenses. -
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Ready for grinder rework & final draino. -
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Ready for soldering. -
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3 hours later. The 3 Vdd pins all have to be connected & they're real busters. -
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1 more 2 go. -
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Another exposure before getting back to the commute.
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U have to constantly try things with the SCP1000. -
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& the reinforced landing gear -
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That was a 15m altitude change & 2 pirouettes in picoc. -
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That was the cross mission & 2 circuits in picoc. -
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That was 4 orbits with the nose pointing in different directions in picoc. Impossible with tables of waypoints.
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With no wind & optimum placement, U see how far ahead of ublox5 the SCP1000 was. -
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This shows how we're staying within 1m of the target altitude with no wind. -
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Whew. The last crash didn't leave much, but now we don't have any 12" propellers for lifting cameras. -
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Seeing these orbit missions replayed with barometric altitude has more sentimental value. The last time she flew these, Russian Heroine was still around. -
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A GPS log of a GPS malfunction shows U what it detected after it was already in the tree
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Today's dumpy apartment sunset. -
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Direct from our state of the art CAD software, it's the Vika 3 mockup. -
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U may worship CAD software, but it can't tell U what it's like to manipulate components bare handed in a dumpy apartment with only 3 sq ft of maneuvering room.
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Took 3 transparencies to pull it off. Tape 2 laser printouts to a clear one to align them. The clear one should be on top, but even though that part was screwed up, it had enough margin. -
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Burn it. Getting the transparencies flush on the copper is killing us. Those metal weights might be reflecting UV light under the sides. -
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Developed it with the q-tip. Just enough worked... -
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to grind it to completion. Need to develop some test boards to see if 5 min is enough. -
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Pin punch for the antenna. -
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By now, we knew this was a horrible design. -
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Because of the soldering nightmare. -
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Should have also removed all the solder from the module & tinned the board just enough. Etched boards R all about working with what U have.
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$100 doesn't buy what it did last week. -
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Weight test -
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120x82mm Very unbalanced. -
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If Ubuubu saw this, he'd terminate it due to his significant technical difficulty figuring it out. -
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140x82mm Difficult battery swaps. Flexing wire breaks. -
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Your capitalist enemies can still sleep at night because they're just mockups.