A few boxes arrived this week, so I got started on the thrust measurement frame this weekend. I watched a number of videos on safe CFRP working procedures (since I'm cutting simple shapes myself at home), including the one in the previous post. I spent...
A few weeks ago I was messing around with some old Nerf guns and after glancing at a near by dart board I thought popped into my head. Could you make a dart board for Nerf and how would you do it. I started thinking of ways to accomplish the task and...
Got the solar panels from Amazon, and some thin walled "one inch" PVC pipe, a section of 1-1/4", and various couplers, tees, crosses, elbows, etc.The result is in the gallery. Self-tapping screws were used to attach the panels to the pipe (they flex...
Today I worked on a PCB for proof-of-concept, essentially it will be an adapter to a Raspberry Pi header.One module will have a Raspberry Pi, one module will have a Pi DAC module.Once this is working, I will be able to use it to check other custom modules.So...
I ordered 8' lengths of 1"x1" aluminum extrusion and 2"x2" L-bracket to cut down into parts for the aluminum frame. The frame was designed to be a 3' cube, so there wasn't much to be done to the aluminum extrusion besides cutting...
Testing the basic concept To get the for factor as small as possible, the only way to go, as far as I've seen or read is by using a pyroelectric crystal. This has the advantage of taking up a few cubic centimeters...
There were a few hiccups along the way that I thought I would share for the benefit of future hackers.Initial Design ProblemsOne of the first challenges was having eyes bigger than my PCB. This project is an entrant in the Square Inch Project so I was...
Or how one should never trust existing footprint libraries without double and triple checking everything!This morning I decided to finally test the Computer with all cards inserted and... no clock! Not only did I swapped X1 and X2 on the CPU board, which...
With the testing of the AVR Data Recorder completed and a few sample test runs, I was fairly satisfied with the performance and features I was able to pack into this little device. The flexibility, hardware support and program-ability of using AttoBASIC...
It was easy to implement the "MIDI/UTF8"-like packing system (see p7ck.c) and I had no problem integrating it with the scanner. The files are quite large (at a fixed 26 bytes per entry) but compress slightly better than decimal-based representations...
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...
On the advice of someone who's actually helpful on Twitter I've spent the last few days finishing the font set (ASCII Extended code page 437, the old DOS extended ASCII with those weird 'box' characters), and optimizing the font rendering speed....
We thought you might be interested in knowing the mechanics and math involved in four stage arm control. Its quite simple really. We hope this will help a few new hackers with their future builds. Here we go...The aim of this algorithm is to determine...
In the last log I talked about the basic calculations behind triangle rasterization. But we ended up with a few interpolations (and therefore, divisions) we needed to do every scanline. These are costly in both time and resources, so I want to avoid...
20200219 - Tuesday From now on I'm going to refer to the NICs by their most obvious identifier for two reasons: It's shorterI'm probably returning the original, but would like to easily be able to refer to either. I'll refer to the original as PT. I'll...