Teensy 4.1 Expansion Board with DC-DC Converter

  • Rajkumar Sharma
  • 46 Views
  • easy
  • Tested
  • SKU: EL154898
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The Teensy 4.1 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 Teensy 4.1.

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 25V 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 500mA, 5V Up to 500mA
  • Connectivity: 2.54mm male headers are used for easy connection, and screw terminals are provided for power input.
  • Reverse Power Protection: A diode D3 at the input power helps prevent accidental reverse power input.
  • Power Indicator: An onboard LED D1 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, 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. It has a maximum current handling capacity of 500mA.
  • PCB Dimensions: 87.47 x 50.32 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 22 = 3.3V
  • CN2: Pin 1 To 22 = GND
  • CN3: Pin 1 To 22 = I/O 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 24, 25, 26, 27, 28, 29, 30, 31, 32
  • CN4: Pin 1 To 20 = I/O 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 41, 40, 39, 38, 37, 36, 35, 34, 33
  • CN5: Pin 1 To 20 = 3.3V
  • CN6: Pin 1 To 20 = GND
  • CN7: Pin 1, 2 = 5V DC Output (Max500mA), Pin 3,4 = GND
  • CN8: Pin 1 = VDD 12V To 25V DC, Pin 2 = GND
  • D1: Power LED
  • J2: DNP No Use
  • J1: 5V Power Input Selection for TEENSY, Jumper Closed = Teensy is Powered from DC-DC Converter (Jumper Open J1 If Powered from USB)

Schematic

Parts List

NOQNTY.REF.DESC.MANUFACTURERSUPPLIER SUPPLIER PART NO
13CN1,CN2,CN322 PIN MALE HEADER PITCH 2.54MMWURTH732-5330-ND
23CN4,CN5,CN620 PIN MALE HEADER PITCH 2.54MMWURTH732-5329-ND
31CN74 PIN MALE HEADER PITCH 2.54MMWURTH732-5317-ND
41CN82 PIN SCREW TERMINAL PITCH 5.08MMPHOENIX277-1247-ND
52C1,C3100nF/50V CERAMIC SMD SIZE 0805YAGEO/MURATA
62C2,C610uF/25V CERAMIC SMD SIZE 0805YAGEO/MURATA
71C41uF/50V CERMAIC SMD SIZE 1206YAGEO/MURATA
81C5470uF/16V THT ELECTROLYTIC DIA 8MMKEMET399-ESK477M016AG3AA-ND
91C7470PF/50V CERMAIC SMD SIZE 0805YAGEO/MURATA
101C8100uF/35V ELECTROLYTIC DIA 8MMKEMET399-ESC107M035AG3EATB-ND
111D1LED RED SMD SIZE 0805OSRAM475-1278-1-ND
122D2,D3SS34 SMD FAST DIODEONSEMISS34FSCT-ND
131J12 PIN MALE HEADER PITCH 2.54MMWURTH732-5315-ND
141L1600 Ohms @ 100 MHz 1.5A 100mOhmLAIRD240-2390-1-ND
151L2220uH/1.2AMP 10MMX10MM WURTH732-4110-1-ND
161R11K 5% SMD SIZE 0805YAGEO/MURATA
173R2,R3,R41E 1% SMD SIZE 1206YAGEO/MURATA
181R5DNP
191R63.6K 1% SMD SIZE 0805YAGEO/MURATA
201R71.2K 1% SMD SIZE 0805YAGEO/MURATA
211U1TEENSY4.1PJRC1568-DEV-16996-ND
221U2L1117-3.3VTILM1117MPX-3.3/NOPBCT-ND
231U3MC34063 SOIC8TI296-17765-1-ND
241SHUNTSHUNT FOR JUMPER J1SULLINS CONNECTS9001-ND

Connections

Gerber View

Photos

Video

Teensy 4.1 Datasheet

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