||[Jun. 22nd, 2017|09:39 pm]
sprockets, sockets, grommets & gaskets
Nobody wanted to go riding at lunch today because everyone was tired and there was a lightning storm outside.|
I rode over to Xilinx and rode with them instead.
We rode down to Niwot almost entirely offroad, because Bill has a brand new cyclecross bike. I was on my road race bike, sliding all over the place on the gravel and sand.
It was exhausting.
My coworkers DO all want to go out riding tomorrow, but I don't think I'll have time.
Pirate the bunny is so blind sometimes I feel like I need to hand-feed him to get him started on new food I put in his cage.
Monty got jumped by a posse of four chihuahuas today, all loose. We ran, because I don't want to have another chihuahua eaten.
My phone updated itself and has turned into Super Naggy Phone. "I see your battery is at 30%, would you like me to turn off Bluetooth?" Which gets really annoying when it tells me about six times a day that I have the ringtone silenced and might miss calls and would I like to change that. I'd like a NO FOREVER button.
We have milkweed growing like, well, weeds. We are cheering for monarch butterflies.
Some architecture at Regis University, mostly for basefinder
A sunset for elusis
I have a friend on G+ who is in an awful situation: a lesbian dying alone of lupus in her mother's basement in the deep south. She wants a lightsaber. I'm making the drive electronics for a lightsaber acting prop. This is a sample board for fitment purposes, to make sure that one channel of lighting works correctly with a control board someone else is doing, and also provides a one-shot-producing microcontroller using a hall effect sensor. The intent is that when a magnetic ring she wears gets close to the system, it detects the magnet, sends out a single pulse, and the control board handles sequencing and colors, then when her hand moves away it sends out a second pulse. (It's a silly way to handle off/on, in my opinion, but I'm working with someone else's design.) The whole works is a three channel, 1 amp per channel, LED driver with high efficiency, all designed to fit in (while not overheating) a 22mm in diameter cavity inside an aluminum lightsaber body.
I found an old body washer and bored it out to 22mm to make sure it slid snugly over the board.
The board is only about 1/3 loaded: one channel of LED driver and the microcontroller, and one big ol' coilcraft inductor to make sure it fits in the enclosure. It's missing two more drivers and another regulator to provide high efficiency power to the microcontroller. If I get the time I may port the code over to a TI microcontroller that uses 1/1000 the power of this one and costs 1/10 as much.
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