This video shows the controller in action at the Rome MakerFaire.
Mick needed a simple and effective instrument to create drum beats without having to manually write them note by note. He wanted something more than most of the DIY MIDI controllers out there that use simple on/off buttons. The answer was to build his own using force sensitive resistors (FSRs).
The controller has 16 buttons using FSRs arranged in a 4×4 matrix. The FSRs can sense the amount of pressure applied to a button and use that information for things such as a velocity of a note, control change value, etc.
Dave built a home heating monitor to collect data on the duty cycle of all the heating zones in his house in hopes better understanding the activity off all the zones in order to reduce oil usage and save a few bucks.
The first version of the project didn’t pan out so well. The controller used didn’t work out so well. In version 2 of the project Dave used Teensys to take data measurements and send the data another controller.
Dave found that storing the data on a webserver is easier than storing it in an embedded device, and displaying the data in HTML on a web page is more flexible that doing it in a Windows app.
Timothy used an orphaned micro speaker, a jiggle-switch motion sensor, and a blue LED to make the improvements. The motion sensor allows for the TARDIS landing sound to be made when the car is touched.
This awesome looking lightsaber features a Graflex 2.0 for the hilt, which is a prop made to look like the original Gaflex flash gun used for Luke’s lightsaber in the original Star Wars. WS2811 LEDs are used to light up one of the blades. He’s also used SK6812 LED strips for another blade.
This video shows the light saber in action, including the different blades made for it. The sound effects in his lightsaber are most impressive.
The cool thing about a free pendulum is that it has no mechanical linkage, escapement mechanism, or direct mechanical power to keep it going.
A small magnet on the bottom of the pendulum induces a voltage on a coil mounted beneath as it swings past. The voltage is detected by Teensy’s a/d converter and triggers a propulsion pulse applied to the coil from a digital output pin. This gives the pendulum a tiny nudge to keep it going. The pendulum defies the senses, swinging in eerie silence.
Cyclist reported that the accuracy is all about the pendulum. He had it going for about a week and it was running slow by a consistent 1 second per day. He’s working on trying to refine the pendulum and pivot design for easier, finer adjustment.