Kelvin Ly kelvin

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• Joined on 2019-12-20

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kelvin created repository kelvin/xlr-preamp 2022-05-08 01:49:41 +00:00

kelvin pushed to main at kelvin/walkie-talkies 2022-04-18 02:21:39 +00:00

6e82927d47 Finally have working SPI! RST pin isn't being pulled high well enough so the AT86RF was in reset this whole time, along with the wiring issue

kelvin pushed to main at kelvin/walkie-talkies 2022-04-17 13:19:54 +00:00

cc053c9d76 Fix SPI pin mixup in the board header (TODO fix in next rev PCB)

kelvin pushed to main at kelvin/walkie-talkies 2022-04-17 13:19:05 +00:00

f11fa10a5f Add udev rule to make programming marginally easier

e93f115c23 Start work on testing SPI interface, looks like the AT86RF215 might be dead

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kelvin pushed to main at kelvin/walkie-talkies 2022-04-16 12:39:14 +00:00

ad4621cb2e Start work on SPI testing framework

d6402ff656 Set Flash size to 16MB (128Mbit)

f185f281e7 Working USB CDC UART test! NOTE: W25QL128B works great, IS25LP128 does not! Maybe eventually figure out why...

43992205f7 Generate BOMs

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kelvin pushed to master at kelvin/spyglass 2022-03-13 00:57:13 +00:00

3fae751444 Spyglass CAD model designed TODO figure out how to keep eyepiece lens assembly tight, prepare CNC layout for it

kelvin pushed to master at kelvin/spyglass 2022-03-13 00:15:12 +00:00

9ceab36b29 Work on the second design a lot; write my own version of the raytracer to try to speed it up a bit; currently ~30x faster

kelvin pushed to master at kelvin/spyglass 2022-03-11 02:45:37 +00:00

e75d541417 Start working on CAD model for spyglass

030ff67e23 Make focusing its own function, work out the first two elements of the spyglass (need to fix chromatic aberration in the second element)

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kelvin deleted tag master from kelvin/microscope-stand 2022-03-11 02:43:19 +00:00

kelvin pushed to master at kelvin/microscope-stand 2022-03-11 02:43:19 +00:00

90eb34ddac Save microscope models for posterity

kelvin created repository kelvin/microscope-stand 2022-03-11 02:42:49 +00:00

kelvin pushed to master at kelvin/spyglass 2022-03-10 13:05:19 +00:00

62854f6561 Implement a focus finding function; looks like the objective doublet works fairly nicely

kelvin pushed to master at kelvin/spyglass 2022-03-09 02:45:36 +00:00

322f4aec34 Welp looks like it's time to develop some optimization algorithms; paraxial focus doesn't seem to match the raytraced focus value, so I guess lens strength will have to be calculated by simulation

kelvin deleted tag master from kelvin/spyglass 2022-03-08 12:02:40 +00:00

kelvin pushed to master at kelvin/spyglass 2022-03-08 12:02:40 +00:00

41a35adc3d Add initial simulation notebooks and prototyping CAD files

kelvin created repository kelvin/spyglass 2022-03-08 12:01:08 +00:00

kelvin pushed to main at kelvin/walkie-talkies 2022-02-25 12:44:22 +00:00

e94f5e7dec Add copper pours

kelvin deleted tag main from kelvin/walkie-talkies 2022-02-25 12:41:58 +00:00

kelvin pushed to main at kelvin/walkie-talkies 2022-02-25 12:41:58 +00:00

4bc1afbf5c Move PCB stuff into a subdirectory

875595f194 Finish layout of main board

dabc3880f1 Schematic done, start of layout

e4918dd307 Add all the major footprints, set up basic hierarchy

808ce1b907 Add in submodules for RP footprint and libcelt compression algorithm

kelvin created repository kelvin/walkie-talkies 2022-02-25 12:41:31 +00:00