Feed - Redako

remidavidkoster

With the hardware (proof of concept) done I can wr

With the hardware (proof of concept) done I can write some actual firmware! The first mode; battery level indication.
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#diywatch #diysmartwatch #pcbdesign #smdsoldering #ledring #ledmatrix #rgbleds #cncmachining #diycnc #shapeoko #hackerspace #makerspace #dingenbouwen #woodworking #rosewood #touch #sapphire #glass

First ring out of the machine! Still a bit rough,

First ring out of the machine! Still a bit rough, like the rest, but not at all dissatisfied for a first prototype. Despite having fixed most of the ghosting there's now a lot of light leakage through the glass, so I'll have to change the design somewhat to add a barrier between it and the leds. The holes for the leds will be filled in with resin in the final version, but since POM doesn't stick to anything I'll have go get another type of plastic once I'm that far. Back to writing firmware!
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#diywatch #diysmartwatch #pcbdesign #smdsoldering #ledring #ledmatrix #rgbleds #cncmachining #diycnc #shapeoko #hackerspace #makerspace #dingenbouwen #woodworking #rosewood #touch #sapphire #glass

I finally received my sapphire glass disks! Now al

I finally received my sapphire glass disks! Now all that's left is (the end mills for) milling the led cover, and getting the final batteries in the mail. The led cover itself will be a whole adventure in its own - having to be milled in four steps, pouring epoxy in between the middle ones.
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#diywatch #diysmartwatch #pcbdesign #smdsoldering #ledring #ledmatrix #rgbleds #cncmachining #diycnc #shapeoko #hackerspace #makerspace #dingenbouwen #woodworking #rosewood #touch #sapphire #glass

We have control! After a day of firmware, calibrat

We have control! After a day of firmware, calibration, hardware tuning and swearing at ST's disappointing peripheral code there's finally a way in. (@stmicroelectronics.nv, if you're listening, there's some overflow problems in your TSC library.) There's still some alinearity to compensate for, but it's nice and responsive as it is. Looking forward to getting some actual application code on this thing. 🙂
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#diywatch #diysmartwatch #pcbdesign #smdsoldering #ledring #ledmatrix #rgbleds #cncmachining #diycnc #shapeoko #hackerspace #makerspace #dingenbouwen #woodworking #rosewood #touch

And there she is! Súper happy with how the wood t

And there she is! Súper happy with how the wood turned out. I used a different strategy for the tabs and their removal afterwards this time, but even cleaning them off with a separate toolpath until the watch base falls down leaves a bit of a mark - too much to neatly sand off with this dense wood. I'll try to make some fixtures for the next iteration, gotta beat the renders regarding smoothness. 🙂
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#diywatch #diysmartwatch #pcbdesign #smdsoldering #ledring #ledmatrix #rgbleds #cncmachining #diycnc #shapeoko #hackerspace #makerspace #dingenbouwen #woodworking #rosewood

Half way there! . . . #diywatch #diysmartwatch #pc

Half way there!
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#diywatch #diysmartwatch #pcbdesign #smdsoldering #ledring #ledmatrix #rgbleds #cncmachining #diycnc #shapeoko #hackerspace #makerspace #dingenbouwen #woodworking #rosewood

I'm ready (enough) to mill the first real watch! I

I'm ready (enough) to mill the first real watch! I precut a blank from a large chunk of rosewood and will let it sit for a night or two to allow it to bend and warp as it likes. This weekend I'll flatten it, mill it to the exact shape required for alignment during the upcoming three stage milling proces, and hope for the best.
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#diycnc #diywatch #diysmartwatch #rosewood #shapeoko #hackerspace #makerspace #dingenbouwen #woodworking #finewoodworking #highprecision

One more - ball point tip for scale. This watch is

One more - ball point tip for scale. This watch is the smallest assembly job I've done so far, and while designing I was scared it was going to be way too small to enjoy, but I found it surprisingly doable still... up until this bit of rework. If you plan to mess up, I'd recommend one size larger.
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#diyelectronics #diywatch #rework #smdsoldering #stm32 #nrf52 #pcbdesign #microscope #microscopephotography #hackerspace #makerspace #dingenbouwen

Sometimes all your chips want is to be straddled i

Sometimes all your chips want is to be straddled in 0.1mm copper wires... Or to have a proper footprint to sit on. Turns out I mixed up two IMU parts numbers, one that's quite old and isn't really supported by the current ST framework, and one that's nearly plug and play.
Although I enjoy digging to the bottom of some obscure IC and porting old libraries for it, I could also spend those two weeks at the CNC machine milling rosewood watch parts - an easy pick. 🙂
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#smdsoldering #deadbug #pcbdesign #diywatch #diysmartwatch #stm32 #nrf52 #hackerspace #makerspace #dingenbouwen #imu #gyro

And there she is! The tabs could have gone in a be

And there she is! The tabs could have gone in a better place, which I won't bother cleaning up for this one, but I'm not at all disappointed for the first prototype. The next one is definitely going to already be wood. I'll have to wait for my 0.4mm end mills to arrive before I can make the LED ring cover, and then it's another wait before I have the glass disks that cover the touch interface. - For now, back to firmware and ghosts.
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#diywatch #diysmartwatch #pcbdesign #smdsoldering #ledring #ledmatrix #rgbleds #cncmachining #diycnc #shapeoko #hackerspace #makerspace #dingenbouwen

Almoooooost . . . . #diywatch #diysmartwatch #pomp

Almoooooost
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#diywatch #diysmartwatch #pompompom #cncmachining #diycncmachine #hackerspace #makerspace #dingenbouwen

Enough software, time to make something physical.

Enough software, time to make something physical. I'm milling the first prototype out of POM, this gives a 'higher resolution' model than most woods, giving more insight on inaccuracies during the process. .
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#diysmartwatch #diywatch #diycncrouter #fusion360 #hackerspace #makerspace #dingenbouwen #pom #shapeoko #carbide3d

Multiplexing! With 180 individual light emitting d

Multiplexing! With 180 individual light emitting diodes and only 15 available high resolution timer pins you gotta have some of the good stuff in there. I'm using the 15 timer pins to drive the LED anodes, and have a 12 bit shift register to select one of 12 groups of either red, green or blue cathodes. The video displays the process, slowly ramping the scan frequency up to 12khz.
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#ledmatrix #multiplexing #rgblights #diysmartwatch #diywatch #pcbdesign #smdsoldering #dingenbouwen #makerspace #hackerspace #keilewerf

Round two! Development kits for team Bluetooth (@r

Round two! Development kits for team Bluetooth (@remkokruize) and team Android (@het_laatste_niels). Since the board has two microprocessors (the STM32L4 and the NRF52) we'll need two bouts of firmware, one handling all the hardware interfaces (touch, the IMU, the display etc.) and one handling the communication with the app - that also needs to be written. Since I'm mainly a hardware guy I'm happy to have the other guys on board for the higher level stuff. 🙂
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#diysmartwatch #diywatch #diyelectronics #pcbdesign #pickandplace #dingenbouwen #hackerspace #makerspace #stm32 #nrf52

Annnnd we are live! The control board came out nea

Annnnd we are live! The control board came out neat-ish, a bit too much solder on the MCU. First bit of display firmware was a hassle with 15 pin-swapped anodes and 12 similar cathodes that all had to be traced back and mapped to the pins they ended up on - but boy, these LEDs. Next up; IMU firmware.
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#diyelectronics #pcbdesign #diywatch #diysmartwatch #smdsoldering #wheresthegoatnow #dingenbouwen #hackerspace #makerspace

Got my stencils! Almost done spreading around the

Got my stencils! Almost done spreading around the grains of sand, 0402 (luckily) isn't nearly as bad as I imagined. I'm hoping all the ≤0.5mm pitch components will come out without requiring too much rework. 🤞🏻
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#diyelectronics #smdsoldering #pcbdesign #stm32 #nrf52 #diywatch #diysmartwatch #dingenbouwen #hackerspace #makerspace

And, the actual boards! I can either solder the tw

And, the actual boards! I can either solder the two halves together, or solder them both on the bottom section. On the bottom part everything will still be connected, but I'll also have access to a bunch of test points that would otherwise get sandwiched between the boards
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#diyelectronics #diysmartwatch #pcbdesign #altium #smdsoldering #dingenbouwen #makerspace #hackerspace

And so it begins! I have boards, but no stencils.

And so it begins! I have boards, but no stencils. Living life with a chronic lack of patience we'll just have to go in by hand - 0805 RGB leds for breakfast.
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#diy #diysmartwatch #smdsoldering #rgb #pcbdesign #dingenbouwen #makerspace #hackerspace #jlcpcb

Back to the roots, multiplexing LEDs like it's 201

Back to the roots, multiplexing LEDs like it's 2012! Currently preparing firmware for the watch display while the boards are on their way.

On the right is my first ever LED matrix, a piece of laminate flooring proudly hosting 24 of 'em. Comparing the watch display with that one; we'll have a whopping 8192-fold increase in brightness levels, a 150-fold increase in scan rate, and a 7.5-fold increase in diode count - it's going to be pretty.
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#diywatch #diysmartwatch #ledmatrix #multiplexing #stm32 #arduino #dingenbouwen #hackerspace #makerspace

And we have legs! Thanks a million to my old colle

And we have legs! Thanks a million to my old colleague David, wouldn't have been able to have them this optically smooth yet mathematically correct (and parametrically designed) without you. 🙂
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#diysmartwatch #diywatch #dingenbouwen #makerspace #hackerspace #diyelectronics #stm32 #nrf52 #hardwood #woodworking

Still buffering the little legs - I'll get some he

Still buffering the little legs - I'll get some help from one of my old aerospace colleagues rolling out the multi-curvature surfaces today. 🙂
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#diywatch #diysmartwatch #woodworking #hardwood #dingenbouwen #hackerspace #makerspace #diyelectronics #stm32 #nrf52

First rough draft - sure looks like a watch. Hopin

First rough draft - sure looks like a watch. Hoping I'll be able to keep it this thickness or even slim it down a bit once the actual parts are in and measured!
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#diysmartwatch #diywatch #dingenbouwen #makerspace #hackerspace #diyelectronics #stm32 #nrf52

Assembly is going to be a blast - SOT23 for scale.

Assembly is going to be a blast - SOT23 for scale. .
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#diysmartwatch #diyelectronics #dingenbouwen #hackerspace #makerspace #stm32 #nrf52 #smdsoldering

One control board coming up! The whole thing toget

One control board coming up! The whole thing together is going to be a DIY smart watch, with an IMU, Bluetooth, the LED display and the touch interface at the front, a cute little SMD vibration motor, and all the necessary stuff to make it low power enough for a few week's charge. .
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#diysmartwatch #dingenbouwen #hackerspace #makerspace #diyelectronics

Paper watch face seems to fit! Next up is the cont

Paper watch face seems to fit! Next up is the control board.
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#diyelectronics #diywatch #dingenbouwen #hackerspace #makerspace #ledmatrix

What are we making today? . . #dingenbouwen #hacke

What are we making today?
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#dingenbouwen #hackerspace #makerspace #pcbdesign #diyelectronics

New office all floored up! . . #thanksermiandian #

New office all floored up! .
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#thanksermiandian #eurolaminaat #dingenbouwen

And the final before / after. 🙂 . . #dingenbouwen

And the final before / after. 🙂
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#dingenbouwen #woodworking #sandyourtables

Don't forget to oil your tables . . #dingenbouwen

Don't forget to oil your tables
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#dingenbouwen #woodworking #oilyourtables

Welcome to the world, flock of young ones. Working

Welcome to the world, flock of young ones. Working on firmware for @werccollective's Tane :)

Tomatoes grow at night.

Tomatoes grow at night.

Tomato forest is starting to get out of hand

Tomato forest is starting to get out of hand

The first one's all done! They're a second revisio

The first one's all done! They're a second revision for the DSP boards converting music in to light for @jellyjessyfish. In total I'll make four; Two for the jellies, one for my intern @bartvveggel (that did most of the design work for the revision), and one for me. :)

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