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Augumented Reality: A primer
Log from SonoSight: The AR glass for hearing impaired
Augumented Reality is all the rage today thanks to the constant battle between the giants Apple, Google and Microsoft. Despite each of them trying to come up with their own AR glasses along with startups like META there is still no wide market AR glass....

4. Hierarchical Control Architecture
Log from Hexapod Modelling, Path Planning and Control
Hierarchical control architecture operates based on the sense-plan-act robot control methodology [17]. Initially, information about the surrounding environment of the robot is gathered through the sensors, then a motion plan of the next gait cycle is...

It started to work
Log from JVC to Clio
The first version of the working code. Let me mention here that this is my first project with Arduino and I never used c++ before. But I was intent and did not give up. I will clean the code but at least it works well. There are still some unused function...

Changing the memory access model
Log from Kobold K2 - RISC TTL Computer
In the past weeks, I did first draw the design in the Logisim simulator. The first few instructions were succesfully simulated. Then I started working on a Javascript assembler-simulator combination. While I've been making assemblers in the past,...

2BCD, Or Not 2BCD, That Is the Question
Log from WDC-1 a "Working Digital Computer"
When I first started looking at the book "How to Build a Working Digital Computer" I noticed with interest that the Input Panel converted decimal numbers to Binary Coded Decimal (BCD) and the Output Panel in turn converted BCD results back...

Motor speed control
Log from Build your own TurtleBot 3 backbone
Wheel speed estimation Each hall encoder produces nb_{rising edges} logical rising edges per motor rotation (due to multiple magnetization points on encoder ring). Speed estimation relies on counting the number of logical rising edges nb_{encoder ticks}...

Duh! and Scans!
Log from 3D Magnetic Field Scanner
Offset Calibration (Duh!)Sometimes it takes me a while to "get it." Unfortunately, in this format "a while" may be several build logs. This is one of those cases. The original sensor I was using, the HMC5883L, is intended as a compass sensor. Calibration...

Primitive Rasterization
Log from QuickSilver Neo: Open Source GPU
Although there are other methods for drawing triangles (such as using Barycentric Coordinates, popular in modern GPUs) we'll keep it to just the simplest one: Scanline conversion. In it, a triangle is drawn line-by-line, top-to-bottom, for each scanline...

Change all the things, more battery tests
Log from LayerOne 2017
Last week we did the battery tests using the 800mAh "iPod' battery we have used before, it is cheap and easily available, the results were about two hours running everything, I posted the data earlier. That is not great, the conference is 3 days usually...

Enter The Matrix
Log from Bot Matrix
OK, so the reason this robot is called Bot Matrix, is because one of the central components is a 32x32 RGB LED matrix. These LED panels are the type used in Jumbotron screens or advertising billboards. They have a set of shift-registers and constant...

Z80 Memory Refresh Cycle for LCD refresh? Getting carried away...
Log from Vintage Z80 palmtop compy hackery (TI-86)
The Z80 has an interesting feature in that it's designed to automatically refresh DRAM after each instruction-fetch. The process goes: fetch instruction op-code, then while processing that, refresh the next row in the RAM. It handles 128 rows, incrementing...

PAROL6 kinematic structure
Log from PAROL6 - Desktop robotic arm
This project log will be a little bit longer and full of silly robot theories and facts that you should know if using any kind of robot! A kinematic diagram of a robotic arm is a simplified graphical representation that illustrates the arrangement of...

Let's start =)
Log from LETL trigger
Let's see what did i start with? Well technically I started with submitting project on hackaday so this is the next thing i did. Since I am waiting for my trinket pro I started with designing user interface. I believe that user interface is of the most...

Extra Ports?
Log from Vintage Z80 palmtop compy hackery (TI-86)
I decided to do a port-read of ports higher than the 8 reverse-engineered and documented by others. I found something interesting... while mostly they seem to repeat after every eight steps (which would make sense if they just used a 3in-8out demux)...

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