7-Segment display daughter board for the Teensy 3.2 with an additional SD card connector for reading from. The included code adapts the SevSeg library for the pins used here.

The Github repository has the manufacturing files and the Teensy sketch. The project is released as open hardware under the CERN v1.2 Open Hardware license.

I’ve shared the project at OSH Park so you can buy a set of three bare boards for $5.20, or $1.74 per board.

The Teensy 3.2 is available at PJRC.com or at OSH Park as an add-on at checkout. I’m using a standard 16x2 LCD screen from Adafruit.

The rest of the parts are available at Digikey. If this is your first time building a board, check out our assembly howto and remember to always buy a few extra of the resistors. They’re very small, easy to lose, and often cost 30 cents for three but a dollar for 100.

Ref Qty Description MF_Name MF_PN Digikey
J3 1 CONN MICRO SD CARD HINGED TYPE Molex 5009010801 WM19081CT-ND
LED1 1 LED DISPLAY 4CHAR 7SEGMENT COMMON CATHODE LTC-4727JR LITE-ON LTC-4727JR 160-1551-5-ND
R1-R4 4 RES SMD 470 OHM 5% 1/4W 0603 Rohm Semi ESR03EZPJ471 RHM470DCT-ND