A bendulum is topped with a weight. If you give the top a push, it sways back and forth periodically. The motion is much like a pendulum, except that instead of swinging rigidly from a pivot and moving the most at the bottom, the bendulum’s stem flexes...
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...
So, where I stand now. I ended up using a Mesa 5i25 PCI card and a 7i76 step/dir control card. The Yaskawa servos have pretty good auto tune so I decided to leave the PID loop up to the servo drives.Speaking of servo drives, that and the servo motors...
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...
14.03.2014. I must admit that I was partially wrong. We just tried a more powerful stun gun 800,000 volts. We installed two sewing needles on it and pierced the carbon tape. On the needles remained voltage of about 150 volts. The person will feel the...
Media artists often need to play multiple videos on multiple screens in loop for long time. Often they also want to play all videos synced (i.e. all of them starting at the same time). Having one device (for example a computer) playing all videos requires...
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...
I've done this project twice. The first keyboard completely died shortly after I made my spare. Unfortunately the new one's USB hub is less reliable. The keyboard doesn't get activated soon enough to send keypresses during booting... I've been...
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 first thing I noticed is that by twisting the line until it self-coils into a tight spiral doesn't work very well, since the tight coil doesn't have much room to stretch out and retract like a spring. What I did was twist the line to the point just...
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...
Design choices:-ATmega 328 μController + DS1307-Supertex HV5812-IN-12 Russian Nixie Tubes-Use of reed switches to allow control while not having buttons showing
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...