IntroductionVaporization is done by off-the-shelf ultrasonic atomizers, either really cheap ones (the black ones in the picture below, 2.50 $ each) or some more rigid ones (the silver one, a Fogstar 300, 290 € each), air is moved by an array of...
I've been busy with other projects, summer and the day job, but here's an update on the Pinstax. After weeks of perking this project through my brain, I enjoyed some frenzied productivity as ideas came to 3D printed reality. One of the problems...
This HOW-TO explains a quick and easy way to speed up NetBSD pkgsrc compiling on retrocomputers. It was written because there are altogether too many distcc how-tos which are complex, require special build environments or make assumptions without explaining...
[Intro] {Updated 2/25/2016}VisualK-OS collectively refers my custom-built system of lighting devices, intended for use with my band's (Saturn's Iris) live shows. To date, the system consists of: The main control center, Thor and the Flood Bank Array...
To make the claw open and close, a 24V solenoid is used to pull the plunger into the cavity and close the claw via the linkage. There is a return spring that allows for the plunger to be pushed out and open up the claws. this was added as...
The battery in my Lenovo laptop were slowly losing part of it's capacity. The remaining capacity was 69% (good score after 2,5 years) but I need the really long battery time while travelling. The battery statistics according to Lenovo power utility:So,...
Nakano, K., et.al.(refs below) describe two versions of a small stack machine suitable for implementation on an FPGA and they give the Verilog source code on their web site. The design was ported to the DE2 board and extended to have a richer set of...
For a bimolecular reaction involving two molecules A and B, with concentrations [A] and [B] and a rate constant K, the probability of the reaction occuring (from mass action) will be K[A][B] . Assuming a time step which is short enough to make the probability...
We can use the FPGA to do fast numerical integration to solve differential equation models of neurons. This page describes a couple of neuron models and their solution by DDA techniques. Eugene Izhikevich developed a simple, semiempirical, model of cortical...
NOTE: This project is gradually improving. It is fully functional at this point, but it could be better.It started as a pen plotter based on the entrails of a printer. It uses a pen to draw paths from a vector graphics file(SVG file). I wanted to make...
The origional idea was to take some basic inexpensive parts from china and put them togethor to make a dual output bench supply. A primary converter from 120VAC to 35VDC is quite available, and small bucking modules from 32VDC to 0-30VDC are quite available....
Apologies in advance for the potato-quality photo, I'll get a better one uploaded when I have a chance. The picture is actually four of the boards as they arrived direct from our manufacturer with a penny for scale. This project was done by the now-defunct...
It's intended as an educational toy for my 2 year old son. The idea is that he plays with letters and numbers and eventually spelling and maybe even math.As mentioned above, there is a PS/2 keyboard attached to an ATMega328-P programmed using Arduino....
This page describes a prototype board for the Atmel Mega644 or Mega32 (PDIP) MCU. It includes a power supply, crystal clock, and generous bypass capacitors. A six-pin header allows flash memory programming from an STK500 or AVRISPmkII. All port pins...
Video GenerationThere are several very good references for understanding how TVs are controlled by a pulse sequence. I particularly liked the Stanford EE281 Handout #7 entitled "TV paint". Also very useful were Software generated video, by Rickard Gunée,...