Scott Pitkethly of Cutlasses put together an incredible DIY Eurorack Looper.

The looper uses the ADC and DAC in the Teensy 3.5 to process the audio.  The audio is recorded to an SD card to get past the RAM constraints.  SD cards are known for being slow, so two circular buffers are used – one to read the audio and the other to write it.

Once a loop is recorded, you can cut it in real time using the 8 buttons.  The buttons communicate with the Teensy via I2C.  A shift register is used to scan the buttons and turn the LEDs on and off.  The looper also features knobs that allow you to change the playback speed.

Details of the build can be found on this Cutlasses blog page.  Code for the project is published on GitHub.

David Kuder developed the Tiny SCSI emulator that can help breathe new life into old hardware.

The emulator is based on a Teensy 3.5 and uses a NCR 5380 SCSI controller chip.  IT supports multiple device IDs, types, and logical unit numbers (LUNs).  It fits in a compact 3.2″ x 1.6″ footprint and also has a 64×48 OLED display.

Code and Schematics for the project are available on Bitbucket.

 

 

Benjamin Blundell has converted a Nintendo Power Glove run on modern systems as a USB joystick.

This totally rad project to breathe new life into 80’s technology. Benjamin has some affinity for some of the better parts of the 80’s , like- technology, style, and music.  This nostalgia for 80s tech lead him to take a look at the Nintendo Power Glove to see if he make it usable with modern technology rather than just the NES that it was designed for.

To start out, Ben gabbed a multimeter and mapped out the which of the BD9 connector pins correspond to which NES pins.  Luckily there is a lot of good information available on the NES controller protocol.  He then whipped up a converter board with a that the Power Glove plugs into to allow you to then use the Glove over USB.  The converter board uses the flight joystick capability of the Teensy-LC.  A level shifter was added because the Teensy-LC runs on 3.3v and the Glove on 5V. One of the nice things about this build is that it doesn’t requiring hacking the innards of the Power Glove itself.

Code for the project is published on GitHub.

Peter Jonas (PumpkinEater on the forum) made an antenna analyzer based on a DDS (Direct Digital Synthesizer) module with a built-in AD9851 chip.

This antenna analyzer can be used to find out at which frequencies a short-wave antenna is matched to the 50 Ohm impedance of the cable and the transceiver. This behavior is presented by the so called “voltage standing wave ratio (VSWR)”. To get this value for a frequency range, a Teensy 3.5 controls a DDS (Direct digital synthesizer) signal generator, which sweeps frequencies between 100kHz and 30 MHz. The hf voltages on the signal generator and at the antenna under test are read by the Teensy and compiled by some calculations to derive the VSWR values. The results are shown on a TFT touch display.

Jeff Hopkins has developed and electronic aerophone, The Open Woodwind Project, that focuses on usability and easy to make yourself.

Jeff wanted to develop an electronic instrument that was easy to use, inexpensive, and easy for the average maker to build.  The result was his electronic areophone, a MIDI woodwind controller.

The project uses a Teensy 3.2 and the Audio Library to create a good quality onboard synthesizer with waveform synthesis and reverb effect.

These demos show off the great sound effects that have been created using the the on board synth.

Gerrit (forum user) built a panel that controls 8 motor faders.

The panel uses L293B H-bridges to drive the motors.  The fader wipers and touchtracks are connected directly to the Teensy. Each faders has it’s own PID control using 12 bit PWM at 14648.437 Hz. A second Teensy is reading the values from the faders via I2C and shows the raw values on the LED displays.

This project makes use of the ResponsiveAnalogRead.  Gerrit notes that he’s found the performance to be pretty good.  The faders can move fast and he’s been able to get very little overshoot, even at high speed.

 

Jonathan Payne made the Teenstrument64-LC, a cool MIDI sequencer made from an Adafruit Untztrument.

This device features 3 instruments on 3 MIDI channels as well as a 32 step sequencer for each instrument.  It takes advantage of the native Teensy USB MIDI stack and also connects to an iPad using a USB camera connection kit.

James Best a very cool wall mounted LED music visualizer that lights up his room more than the over-head lights do.

Armed with blue tape and some hand tools, James got to work mounting 900 WS2812 LEDs.  After a miss-step with some Gaffers tape and some sanding, the adhesive on the LED strips adhered nicely to the wooden base.  The original Arduino didn’t have quite the processing power needed for the project, but the Teensy 3.2 with built in Direct Memory Access (DMA) was up to the task.  The final enhancement to the project was a diffuser to help hide the internal components.

Additional information on the project can be found on this page.

 

 

Arduino “having11” Guy created an autonomous robot to hunt down and destroy dandelions.

After being frustrated a dandelions out pacing his grass between mows,  Arduino Guy (who also does project consulting for) built a robot using a Devastator Tank Cassis from DFRobots, a Pixy2 Camera, and a Teensy 3.5, to roam a yard to identify dandelions and chop them down.

Additional details as wells as the code is available on this Hackster.io project page.

Daniel Gilbert (Tall Dog on Tindie) has developed a breakout board that let’s you easily use Arduino shields  with the Teensy 3.5 or Teensy 3.6

This convenient board includes all parts needed to assemble a breakout board that allows you to connect a Teensy 3.5 or Teensy 3.6 to shields designed for the Arduino Due and Mega.  It features switches to select between USB or external power as one to set the US host port’s power mode (used for the Teensy 3.6).