Tag Archives: Teensy

E-paper Shield Kit for the Teensy


Jarek tipped us with his latest project, an E-paper screen shield kit for Teensy. He writes:

E-paper screens have been hacked out of Kindles and store price tags for a while, but this is the first ( to my knowledge ) open-source project which offers a simple and cheap interface for E-paper. After you prototype your idea with this board, you can get the plans from my project page and integrate the solution into a project or commercial product without having to iterate fives times as I have to get the E-paper driving circuitry just right. The shield fits over most Teensy boards, and the female headers mean you can plug wires right into a breadboard or any other 3.3V microcontroller board. E-paper is sensitive to temperature, so there is an I2C sensor on board that can be used if you need to use your E-paper in harsh environments.

E-paper Shield Kit for the Teensy – [Link]

Teensy 3.5 and 3.6 Are Here !

“Teensy” is a tiny size board compatible with Arduino software and libraries. Teensy 3.1 & 3.2 was the last version from Paul Stoffregen (PJRC Company) the creator of Teensy.


Table is from PJRC website
Table is from PJRC website

Paul started a Kickstarter campaign for The new Teensy 3.5 and 3.6 and until the time of preparation of this post, there are 1,697 backers and campaign raised $102,974 of the $5,000 goal with 15 days to go.

Teensy 3.6
Teensy 3.6
Teensy 3.5
Teensy 3.5

Teensy 3.5 and Teensy 3.6 have slightly differences. I made a full comparison in the bellow table:


Teensy 3.5 has a lower in features MCU (RAM, Flash, clock and some peripherals) which make it slightly cheaper than Teensy 3.6. Teensy 3.5 has 5v tolerance on all digital I/O pins.
Only Teensy 3.6 has a USB High Speed (480 Mbit/sec) port accessed using 5 pins on the board.



Teensy 3.5 and Teensy 3.6 are 6-layer PCB with 28 pins compatible with previous Teensy3.x models.


As we said, Teensy is compatible with Arduino software so Arduino IDE is the primary method used to program Teensy 3.6 and Teensy 3.5.

Paul (PJRC company) offered Teensy 3.5  for 23$ and Teensy 3.6 for 28$ for the Kickstarter campaign backers shipped in October.



MIDI to USB Adapter with Teensy


Joonas Pihlajamaa wanted to connect his keyboard to his Macbook and for that reason he build a MIDI to USB interface using Teensy board, an optocoupler and some resistors.

Thankfully, I had a MIDI connector and a high-speed optocoupler at hand, and with these I could implement a MIDI in rather easily. After some investigation with Arduino Uno, it seemed quite simple to receive the serial MIDI bytes and dump them over Arduino serial

MIDI to USB Adapter with Teensy – [Link]


Teensy GPS Logger redesigned in smaller version


The last and final design, the Teensy and GPS is directly powered from 3.7v li-on batt. Arduino code and pcb layout (ARES) available.

Teensy GPS Logger redesigned in smaller version – [Link]