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A little background
Log from Brushed DC Servo Drive
This project came to be when I became tired of searching for a commercial option for closed loop position control for a CNC machine I'm developing. The majority of the retrofit CNC drives I found were stepper motor drives, and altough many brushed or...

ULTIFlow
Details from ULTIFlow
Update 6 (1/11/2017) - uGFX, guis and beyond!Over the last few days I have been working on getting uGFX baked into my code. As of last night I finally managed to get the library drawing my main menu along with trigger events for the button clicks. So...

random Q's
Log from Floppy-bird
Does it erase first, then write? Apparently not. I guess since it's binary, it needn't worry about 'ghosting' of old data. Then what's with the "erase" head[s]? Those erase (maybe 'crop'?) the edges of what was just-written. "tunnel erase". Apparently...

How to Maintain a MTD Yard Machine Garden Tractor
Details from How to Maintain a MTD Yard Machine Garden Tractor
Disassembly procedures Read some of the directions in Maintenance a MTD Yard Machine Lawn Tractor and perform SECTION G STEPS #01 - #15 contained therein. Only when fully completed proceed with those steps shown below. Step 1: Remove the fuel line hose...

Introduction to KiCad and FreeCAD
Details from Introduction to KiCad and FreeCAD
FAQ This course consists of 4 pre-recorded videos and 4 live office hours. More FAQ here. Classes are pre-recorded and will be released Tuesdays at 19:00 IST/9:30a EDT/ 6:30a PDT. Office Hours are Fridays at 20:30 IST/11:00a EDT/ 8a PDT. Link to calendar...

"Why worry? Each of us is wearing an unlicensed nuclear accelerator on his back." -- or, on The Independent Design and Production of a Functional-In-Universe Proton Pack
Log from "Ghostbusters" Indie Proton Pack Build
Right, so a Proton Pack functions, basically, by generating a highly-energetic, directional stream of intense, charged alpha radiation -- i.e., high-energy protons at high speed.If a cyclotron isn't a reasonable possibility, well, what is?Let's break...

A Workbench Companion, from an Amazon Echo Dot
Details from A Workbench Companion, from an Amazon Echo Dot
Check out the full build video! Parts and Tools Parts: 5" B&W CRT televisionAmazon Alexa Echo Dot (3rd gen)M2, M3, M4 screw assortment AmazonM3 and M4 brass standoff assortment Amazon4x rubber feet Amazon2x TDA7297 12V audio amplifier AmazonAdafruit...

Radioactive sources
Log from Open source expansion cloud chamber
1. UraniniteTry to buy Uraninite (formerly pitchblende) at a mineral show. I bought some pieces of Uraninite from the famous formerly Russian uranium mine of Hartenstein, Saxony, Germany, at an internet mineral show. Uraninite contains up to 88% uranium....

Supporting X-Axis Expansion
Log from Monoprice Select Mini Electro-Mechanical Upgrades
Balance. Why is it needed? One end of the X-axis is unsupported. If you extend this out, there should be enough force to have thins begin to bend. I'm not an mechanical engineer so I cannot calculate how much the 3 Z-Axis rods will bend when you're mid...

LCD Set up
Log from Viper PRO
OKAY, now that we have the raspberry set up, we can star the assemble of parts.Let's make the LCD work!First thing that we need is a adapt board ( its on components list), so we can solder every pin on 40 pin connector to the 40 pin GPIO on raspberry.Now...

PCB Design
Instructions from $1 PCB Christmas Tree
I designed my PCB Christmas tree using Autodesk EAGLE. EAGLE is an electronic design automation (EDA) software enabling schematic diagrams design, component placement and PCB routing. I started the design by creating the schematic of the electronic circuit....

More pins, more serial and a wall
Log from Extension card for TDS3000 scopes
Before going to the serial port subject, I took some time to analyze the display pins. The clocks were easy and matched what I found about some simple color LCD datasheets DotClock : pin 2 (25MHz, 50% duty cycle)HSync : pin 3 (31.5KHz, 88% duty cycle,...

UPDI HV Programmer
Details from UPDI HV Programmer
Mode Jumper Settings: Mode JumperProg ModePA0 ConfigurationsHV PulsePower Cycleno jumperUPDIUPDINONOpins 2-3 shortedHVUPDI, RESETYESNOpins 1-2 shortedPCHVUPDI, RESET, GPIOYESYES Modes: UPDI Mode: This mode would be used when the UPDI pin is configured...

Keeping the Tile Interface?
Log from TMD-2: Turing Machine Demonstrator Mark 2
IMHO the best part of TMD-1 is the tile interface. Programming the machine by filling out the State Transition Table with "special" tiles feels natural, something about the tactile nature of the process I guess. It's also a lot of fun. I've had a few...

UPDI HV Programmer Stick
Details from UPDI HV Programmer Stick
Uploading Firmware SELFPRG Jumper Settings: SELFPRG JumperProg Modeno jumperNormal operation.pins 1-2 shortedUPDI - Uploading firmware or installing bootloader via UPDI header using another UPDI (HV) programmer. This is necessary when no bootloader is...