683 Results for "Q%20%EC%95%88%EC%82%B0%EB%B8%94%EB%9E%99%EC%9E%AD%20CDDC7_C%D0%9EM%20%E2%97%86%EB%B3%B4%EB%84%88%EC%8A%A4%EB%B2%88%ED%98%B8%20B77%E2%97%86%EC%88%98%EC%9B%90%EC%9E%A5%EC%95%88%20%ED%94%84%EB%A1%9C%ED%86%A0%20%EA%B5%AC%EB%A7%A4%E0%B9%8F%ED%86%A0%ED%86%A0%ED%95%AB%ED%94%BD%E2%8F%AC%EC%98%A8%EB%9D%BC%EC%9D%B8%ED%99%A9%EA%B8%88%EC%84%B1%E0%BC%88FX%EB%A7%A4%EB%A7%A4%E2%8B%8D%EC%95%88%EC%82%B0%EB%B8%94%EB%9E%99%EC%9E%AD%EC%95%A0%EC%9A%A9%20thorough/"

Normalized spectra...
Log from Compact, $25 spectrometer
28 May 2018 Like a kid with a new toy, I could not resist testing the spectrometer out on various targets. First, I soldered headers onto the board and mounted it on a breadboard along with a small Arduino-programmable (Ladybug) STM32L432 MCU: I tested...

Final parts.
Log from Christine's Blooming Rose
Finished up modeling the parts. The petals: Heat formed nylon over a chandelier light bulb to give the flat print a two dimensional curve. The little raised bits form springs which extend the petals. The base: I ditched the fully 3D...

Log #9 BLDC Hybrid drive with "2-speed Shifter"
Log from Hoverboards for Assistive Devices
While I was experimenting with controlling the speed of the H/B drive wheels, I realized that really slow speed control was difficult to achieve with reasonable torque. This is unfortunate, because I'm anticipating needing slow (safe) speeds, but...

Hall sensors as encoder
Log from FPGA based robot vacuum cleaner
As mentioned in a previous entry, the robot is using two revolution counters, one on each wheel. The encoders are not directly connected to the wheel, but to the motor drive rod. The drive rods are then immediately linked to the wheel. The encoder...

Making choices, validating them.
Log from Bye bye cargo trike, hello cargo bike !
The donor fame being chosen, half of the geometry is settled. Then comes the time of choices.What length do I need, or want, for the cargo bay ?What width ?Do I want to go easy with a large, straight central beam and secondary beams on the side ?Or should...

*a smaller keyboard has entered the chat*
Log from The Smallest Keyboard
My previous tiny keyboard was designed for direct soldering to a Raspberry Pi Pico, so what made sense at the time for ergonomics (lol) was to use the largest tactile switches that fit the given footprint. The PCB routing was relatively simple,...

[R] AR/VR/MR Curiosity
Log from T^2 TyMist [gd0138]
Whilst impatiently waiting for the optical gear to arrive from AliExpress, I did a bit of looking around on the internet for things related to Mixed Reality. It's not strictly TyMist related, but with all the different systems I'd need to design...

[T] Black+White PDLC Squares
Log from T^2 TyMist [gd0138]
I'm cleaning up my AliExpress basket and I get an idea:Double down and get even more squares into this T^2 tech. 30cm * 3.14 / 2 = 47cm, which is 2cm longer than 3 * 15cm. I can have the 3 white ones on the front of the cylinder tube and the...

I Think the Answer Is... (Part 1)
Log from Think-a-Tron 2020
For the original Think-a-Tron, I'm assuming that the game play went something like this: Someone reads the question from a card.Both players verbally declare what they think is the correct answer (A, B, C, T, or F).The card is inserted into Think-a-Tron,...

Version 2.α
Log from TritiLED
I breadboarded a first cut at a more efficient circuit this past weekend. Consensus is that it appears a little brighter than the 1.0 circuit (not measured with the camera yet), and a back-of-the-envelope estimate says it will run for two years on a...

Refining the feature set and the circuit.
Log from RC Battery Backup with Magnetic On/OFF Switch
Feature Set Additions: I contacted a engineer friend who is also a RC enthusiast (he designed the LTC4412). He gave me a long list of additional features and helped to settle out the design requirements. I tossed out a lot of his feature set as being...

Design thoughts snapshot
Log from Ventbot: warm side cool, cool side warm
This is a recap of my thinking about the design of this project. Some of it I've mentioned or hinted in earlier project logs, and some has lived only in my tiny brain.For the software framework, I plan to use ESPHome. I've used that already for several...

Every journey starts somewhere
Log from CNC desktop laser/dremel mill/microscope
So ... everything has some kind of start as does this project. For a start there was an idea to do a custom PC chassis out of 2 mm aluminium: http://www.overclock.net/t/1533039/scratch-build-axon-stretcher/0_50#post_23516587 I got it all figured out...

Bench Assembly 1
Log from Lab Rebuild and Benches
The central part of the bench are left and right uprights. (please pardon the terrible off angle picture.These are made of two steel extrusions, welded to a bottom bar with leveling feet. Along the sides of the extrusions are T-slots which bolts slide...

Motor Sizing & Wheel Selection
Log from LabRATory Telepresence Robot
Hello All!In this post I am hoping to showcase some of the design work that goes into motor selection. If you are curious about this process, I highly recommend the free resources available at the California Mechatronics Center . This company...

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