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Teensy Arcade Synth

PJRC forum member Nick Culbertson, who you may recall from the (“world’s smallest?”) Mini MIDI Controller project, is back with more Teensy-based synth goodness, this time in the much larger, cigar-box-sixed Teensy Arcade Synth.

Built around the Teensy 4.0 and Audio Adaptor Board, the project incorporates a rotary […]

Universal Data Acquisition and Logging

PJRC forum member MarkusGruen has developed RTMC (Real Time Measure and Control), a universal data acquisition, logging and I/O system. The Teensy 4.1-based platform enables data capture from any I2C, SPI, RS-232, or analog sensor.

Data can be sampled from eight sensors simultaneously at up to 4.4KHz, then transmitted […]

Hamamatsu CCD Controller

PJRC forum member DrM is back with another CCD (charge-coupled device) project, this time a controller for the Hamamatsu S11639-01 linear CCD sensor, with the aim of making high-end scientific instruments more affordable and accessible.

A GitHub repo provides KiCad files and firmware for the sensor/controller set. Some […]

Ball-Seeking Hoop

YouTuber Stuff Made Here has shared the latest evolution of his intelligent basketball hoops, this time in the form of the ball-seeking hoop.

Powered by a Teensy 3.6, this robotic backboard moves through three-dimensional space to ensure every shot ends with a satisfying swish.

A specially modified basketball’s position is […]

Beatmaker’s Sketchbook Sampler/Sequencer

After more than a year of development, sucofunk has released the Beatmaker’s Sketchbook, a Teensy 4.1-based sampler and sequencer. Designed as an open-source alternative to OP-1s and MPCs, it follows a “Sample, Sketch, Arrange, Play” workflow to help take your ideas from simple noodling to live performances.

In […]

OLIA – Open-Source Digital Lock-In Amplifier

Andrew J. Harvie and John C. de Mello have created OLIA, an open-source digital lock-in amplifier. Digital lock-in is a method for isolating weak signals to facilitate measurement amongst background noise, which is processed away via digital signal processing (DSP).

The Open Lock-In Amplifier (OLIA) is a Teensy 4.0-based […]

Ottopot MIDI Controller

Gero Takke has created the Ottopot, a MIDI controller with “nothing but 8 dials.” But what dials they are! 14-bit MIDI CCs (changes) with a 1:1 mapping to physical movement provides an experience more akin to analog pots, but with continuous rotation.

Gero’s controller exceeds the typical resolution of […]

LED Lines Algorithm

The technology we experience as children can have a lasting impression. An algorithm that Mate Steinforth saw at a relative’s house had such an impression that three decades later it drove the creation of a Teensy-based realization in LED form.

Using the SmartLED Shield for Teensy 4 and […]

Polyphonic Digital/Analog Synth

Back in 2017, Paul designed a board for the Cirrus Logic CS42448 chip, which provides gobs of high-quality audio I/O, and shared it on OSH Park. PJRC forum member tubelab.com picked up a few of them, and created a 6-voice polyphonic hybrid digital/analog synth.