Teensy 4 Expansion Board with DC-DC Converter

  • Rajkumar Sharma
  • 16 Views
  • easy
  • Tested
  • SKU: EL154874
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The Teensy 4 expansion I/O shield is designed to simplify the connection process, saving you time and effort in your project development. With its compact design and ease of use, this board is perfect for prototyping, proof-of-concept development, and production-ready applications. Whether you’re a hobbyist, student, or professional, this board is essential for anyone working with the Teensy 4.

Features

  • Digital and Analog Line Access: All digital and analog lines can be accessed through header connectors.
  • DC-DC Converter: The board features a DC-DC converter that can take input voltage from 12V to 30V DC.
  • I/O Line Support: Each I/O line is supported with 3.3V and GND connectors, allowing for easy connection of multiple devices and sensors.
  • Onboard Power: 5V and 3.3V power is available to connect various sensors and devices.
  • Power Load: 3.3V Maximum Load Up to 800mA, 5V Up to 1Amp (Max 2Amps)
  • Connectivity: 2.54mm male headers are used for easy connection, and screw terminals are provided for power input.
  • Reverse Power Protection: A diode D1 at the input power helps prevent accidental reverse power input.
  • Power Indicator: An onboard LED D2 indicates the presence of power.
  • Teensy Installation: A female header is provided to install the Teensy.
  • Power Selection: Onboard jumper J1 can be used to power the Teensy-VIN from the DC-DC converter, and removing the jumper allows for USB power to be used.
  • 3.3V Regulator: A 3.3V regulator is connected to the 3.3V expansion lines to power external devices, with a maximum current handling capacity of 800mA.
  • PCB Dimensions: 60.33 x 49.05 mm
  • Mounting Holes: Printed circuit board (PCB) with four mounting holes, each with a diameter of 4mm.

These features make the expansion board a versatile and convenient solution for connecting various devices and sensors to the Teensy microcontroller.

Connections

  • CN1: Pin 1 To 14 = 3.3V
  • CN2: Pin 1 To 14 = GND
  • CN3: Pin 1 To 14 = GPIO 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, NC
  • CN4: Pin 1 To 14 = GPIO NC, NC, NC, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13
  • CN5: Pin 1 To 14 = 3.3V
  • CN6: Pin 1 To 14 = GND
  • CN7: Power Input Pin 1 VDD 12V To 30V, Pin 2 = GND
  • CN8: Power Output Pin 1 = 5V Output (Max 1Amp), Pin 2 = GND
  • D2: Power LED (5V DC-DC Converter)
  • J1: 5V Jumper, DC-DC 5V to Teensy VIN, Jumper J1 Open If Teensy USB Power Is Used

Schematic

Parts List

NO.QNTY.REFDESCMANUFACTURERSUPPLIERSUPPLIER PART NO
16CN1,CN2,CN3,CN4,CN5,CN614 PIN MALE HEADER PITCH 2.54MMWURTH732-5325-ND
21CN72 PIN SCREW TERMINAL PITCH 5.08MMPHOENIX277-1247-ND
31CN82 PIN MALE HEADER PITCH 2.54MMWURTH732-5315-ND
44C1,C3,C7,C10100nF/50V CERAMIC SMD SIZE 0805YAGEO/MURATA
52C2,C610uF/25V CERMAIC SMD SIZE 0805YAGEO/MURATA
62C4,C522uF/10V CERAMIC SMD SIZE 1206YAGEO/MURATA
71C822uF/35V CERAMIC SMD 1210 OR 1206YAGEO/MURATA
81C9470PF/50V CERAMIC SMD SIZE 0805YAGEO/MURATA
91D1SS34 SMD FAST DIODEON SEMISS34FSCT-ND
101D2LED RED SIZE 0805OSRAM475-1278-1-ND
111J12 PIN MALE HEADER 2.54MM (5V JUMPER)WURTH732-5315-ND
121L1F-BEAD 600 Ohms @ 100 MHz, 1.5A 100mOhmLAIRD240-2390-1-ND
131L210uH/5.7A SMD OR THT DIA. 8MM DIAPANASOICP17067CT-ND
141R11K 5% SMD SIZE 0805YAGEO/MURATA
151R243K 1% SMD SIZE 0805YAGEO/MURATA
161R351K 1% SMD SIZE 0805YAGEO/MURATA
171R4DNP
181R58.06K 1% SMD SIZE 0805YAGEO/MURATA
191R61M 5% SMD SIZE 0805YAGEO/MURATA
201R720E 5% SMD SIZE 0805YAGEO/MURATA
211U1TEENSY4PJRC1568-DEV-16997-ND
221U2L11173.3VST497-17239-1-ND
231U3MPQ4420AMPS1589-1788-1-ND
241SHUNTSHUNT FOR JUMPER J1SULLINS CONNECTS9001-ND

Connections

Gerber View

Photos

Video

Teensy 4 Datasheet

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