HackMD and other editors may leave linked media in a markdown document. While this is convenient, links break and media is generally not available when offline. The download_md_media.py script below accepts a list of files file1.md file2.md (should also work per drag&drop) creates a data/ subdirectory finds and attempts to download linked media subsequently replaces links to successfully downloaded media with relative paths download_md_media.py

Microcontrollers these days are fast and well-equipped for brushless motor applications and power inverters, thanks to multiple >1 MSps A/D converters, fast processing with FPU support and GPIO. As such, they can be put directly between voltage / current sensing circuitry and gate driver inputs. There's only one thing that needs to be prevented at all cost: The microcontroller must not lock up during operation or trigger a reset. The one thing one doesn't want to see is a power stage built for pulsed operation getting stuck with FETs turned on for several hundred milliseconds: grafik Shown above is the reaction of an Atmel (now Microchip) SAME70Q21 to a hardware reset observed during reconfiguration of an existing piece of hardware, with the corresponding I/Os now dedicated to controlling a 2kA MOSFET H-bridge.

What's this "Mini560" synchronous buck converter module hiding from us? Shouldn't these small boards be a serving suggestion for the particular part? Let's find the datasheet for this chip. The sections below are mostly an info dump in chronological order - feel free to scroll around and look at the pictures or read in sequence for the story. Enjoy! GOWHW-cXcAAeasG Marketing Lingo One table found on the internet lists nominal output, measured input and presumably measured output I current and voltage values to calculate the conversion efficiencies:

Sensor specs Product Brief: IMX335-LQN (RGB) https://www.sony-semicon.com/files/62/flyer_security/IMX335LQN_Flyer.pdf Product Brief: IMX335-LLN (monochrome) https://www.phase1vision.com/userfiles/product_files/imx335lln_lqn_flyer.pdf Size: 2592 x 1944 Px (5.14 MP) Technology: Sony STARVIS (1st gen.) Pixel pitch: 2.0 x 2.0 µm Active area: 5.184 x 3.888 mm Diagonal: 6.52mm (Type 1/2.8) 2-lane, 4-lane CSI2 10 bit, 12 bit ADC modes

top Cheap 5V 3A UPS boards from AliExpress, what could possibly go wrong? What's on the board? the 1-cell charging IC is linear (TP4056 in SO8) - https://dlnmh9ip6v2uc.cloudfront.net/datasheets/Prototyping/TP4056.pdf The actual supply uses a XYSemi XR2981 boost converter IC - https://cdn.hackaday.io/files/1829407826904960/Xysemi_XR2981.pdf the external diode of the boost converter is an SS54 Schottky diode - https://www.farnell.com/datasheets/2920575.pdf the output indicator LED is red (lowest V_Fwd) the cells to be used with it are in this case NCR18650B - https://www.imrbatteries.com/content/panasonic_ncr18650b-2.pdf

What's in BP-511 batteries? https://www.camerahacker.com/Canon_Accessory/BP511_Disassembly.shtml image https://www.camerahacker.com/Forums/DisplayComments.php?file=Digital%20Camera/Canon/DR-400_pinout.html BP-511 Connector Specification From that quick search, it's not clear what exactly is on the little BMS board.

Non-Obvious Practical Examples 003: "directional fillet", or cutting a softer bending radius for paracord looped through 3D printed holes. Starting Materials FreeCAD Version: 0.21.1 The Problem How to make nice holes for paracord attachment points in 3D printed objects where refined shapes come at no extra manufacturing cost?

Non-Obvious Practical Examples 001: Probing the ways to make what would look like a vacuum-formed cover over a template. PartDesign Thickness or bust! So, mostly bust, and eventually some result in the form of a working block and tackle: image The design is intended to lift up objects while the rope is pulled from above (think well shaft, second level in a building). To facilitate the setup, a sleeve is shoved over the pulleys, preventing the rope from slipping off. The sleeve in turn is held in place by a carbine.

Non-Obvious Practical Examples 002: Modelling a thin strap that wraps around the STL model of a drone. Starting Materials FreeCAD Version: 0.21.1 STL model: https://www.printables.com/model/325938-dji-mavic-3-drone Reference product: https://www.amazon.de/dp/B0CJDDCBCB

Links Issue: https://github.com/j123b567/scpi-parser/issues/129 PR: https://github.com/j123b567/scpi-parser/pull/135 Motivation First standadized three dacades ago in 1992, the Standard Commands for Programmable Instruments (SCPI) have been, and continue to be, a common way to communicate with lab instruments of all sorts. With the exception of less-frequently used block data, SCPI commands and reponses are human-readable both in terms of mnemonics and parameters. Instruments supporting SCPI usually come with detailed Programming Guide documents that spell out and explain commands and parameter types, parameter ranges and the corresponding return values.