Eric Betts was inspired to help decorate a Simpson’s inspired drink station at his office so he created Moe’s Phone – a modified 90’s (or maybe 80’s) era phone that plays Bart Simpson’s prank calls each time the receiver is lifted.
Picking up the receiver plays a dial tone, followed by the dialing of the phone number for Moe’s (it sounds like someone hit the ‘redial’ button). Finally, a random clip starts playing. You can hang up at any time to stop the clip, and the line goes dead when the clip finishes. Small touches like that added a lot to the experience.
Mauricio Bustos was part of a team that built seaGrass, an interactive LED sculpture.
This beautiful, interactive sculpture has 30 30′ illuminated towers. Each platform structure has a Teensy that is used to read capacitive touch elements that were used as inputs to change the light patterns. There are 50 addressable LEDs in each tower structure surrounded by a diffusion shroud to make the lights appear as a continuous light band
This video shows seaGrass at BurningMan.
The electronics that create the magic of seaGrass.
This DIY project is based based on a Teensy 3.6. The teensy generates 40 kHz packets and uses it’s own ADC ( after a two stage amplification) to measure the received packets and their time of flight between two ultrasonic transducers. The wind speed is directly deduced from the measured speed of sound.
A PID control system achieves tilt stability. Tilt angle is calculated from sensor fusion of LSM6DS3 accel/gyro readings passed through an Extended Kalman Filter. Propulsion is done with 3A stepper motors with CUI AMT10 encoders for wheel position and velocity. Steppers were used for their high torque at low RPM and zero backlash, so near flawless stand-still response is achieved. The Kalman filter, LSM6DS3 anti-alias filters, and in-code butterworth filters mitigate the mechanical vibration effects of the steppers.
This test video demonstrates near perfect stand-still response.
The second test video demonstrates motion control while maintaining balance.
A Teensy 3.1 was used for a DIY security token. The functions inlude Trusted Platform Module (TPM) for Integrity Measurement Architecture (IMA) attestation, signing files, and ssh remote login. Some of the features include private keys generated on the token and a physical presence required to reprogram.
The token was simply constructed using the housing from a USB thumb drive and some epoxy to keep it all together.
Forum user whannah built a nifty MIDI joystick so that he could control a synthesizer from his organ.
This joystick solved a couple of problems for whannah. He wanted to control a synthesizer from his organ, but wanted a physical control for pitch bend and modulation, which the organ doesn’t have. Also, he couldn’t plug the organ into the synthesizer because the MIDI control change (CC) messages are sent to the synth when he didn’t want them to be. He couldn’t disable the sending or receiving of MIDI on either instrument. Normally he would need to bring a second keyboard to control the synth, which is a pain. So he built this little joystick box to give him a physical control and also filter the MIDI messages.
You wouldn’t know by looking at it, but whannah said that the hardest part about the project was drilling the holes in the right place.