I've wanted to build my own amp for quite a while. For bass guitar, the selection of amplifiers you can buy is pretty lack-luster, and mid-volume studio amps are hard to find. It seems like most of what's available is either a practice amp or a stadium...
HydraBus v1.0 Rev1.5 In Stock on DigiKey:https://www.digikey.com/en/products/detail/benjamin-vernoux/hydrabus-v1/15652912 Features of the HydraBus board: Very small board only 60mm x 37mm size (extensible with shield which can be connected on top or...
I bought an XMS amplifier from a friend years ago and although it was serving it's purpose I got quite frustrated with having to toggle the loudness feature every time the input was changed. This was the beginning of what has now become my network enabled...
I picked up the vacuum system from Portland State two weeks ago from a professor I know. It was too big for the little things they do and by the time it warms up and pumps down there is no time left. So they decided to get rid of this system and build...
In the original configuration, the airswimmer is propelled by the tail fin, which can be flapped left-to-right using the remote. The whole fish can also be tilted up or down by moving the gondola, which holds the battery and receiver, forward and back...
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...
The idea behind this project was for my sons birthday party. He wanted a robot themed party, so I figured this would be the easiest to build. Similar to the commercial claw machines, the idea is to grab a toy and successfully get it transferred over...
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...
The local club needed another scoring box, and the things cost a fortune. So naturally I thought, "Hey, I can totally build one of those!". And I did, sort of.First attempt was way too elaborate. it was a whole enclosure with EL panels...
For my GPSDO project I’ve opted for a Piezo 2940210 VCOCXO at 10 Mhz. There is a dearth of information on this particular module available online.(A notation notation: I utilize “E” notation to indicate orders of magnitude; thus 1.5E-6...
After gutting a car for the engine in an auto shop class, I found myself with a trove of interesting spare parts. I recycled the car's RPM gauge into a clock that sweeps out the seconds from 1 to 60 and displays a digital time readout. A Basic Stamp...
Using an old Fairplay Scoreboard LED matrix to display scrolling messages (one of which was also for the kiddos birthday, scrolling "HAPPY BIRTHDAY")A PIC 16F870 was used for the controller. The factory controller was ditched as I was unsure how...
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...