Teensy 4.1 Expansion Board with DC-DC Converter
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.
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
| NO | QNTY. | REF. | DESC. | MANUFACTURER | SUPPLIER | SUPPLIER PART NO |
|---|---|---|---|---|---|---|
| 1 | 3 | CN1,CN2,CN3 | 22 PIN MALE HEADER PITCH 2.54MM | WURTH | 732-5330-ND | |
| 2 | 3 | CN4,CN5,CN6 | 20 PIN MALE HEADER PITCH 2.54MM | WURTH | 732-5329-ND | |
| 3 | 1 | CN7 | 4 PIN MALE HEADER PITCH 2.54MM | WURTH | 732-5317-ND | |
| 4 | 1 | CN8 | 2 PIN SCREW TERMINAL PITCH 5.08MM | PHOENIX | 277-1247-ND | |
| 5 | 2 | C1,C3 | 100nF/50V CERAMIC SMD SIZE 0805 | YAGEO/MURATA | ||
| 6 | 2 | C2,C6 | 10uF/25V CERAMIC SMD SIZE 0805 | YAGEO/MURATA | ||
| 7 | 1 | C4 | 1uF/50V CERMAIC SMD SIZE 1206 | YAGEO/MURATA | ||
| 8 | 1 | C5 | 470uF/16V THT ELECTROLYTIC DIA 8MM | KEMET | 399-ESK477M016AG3AA-ND | |
| 9 | 1 | C7 | 470PF/50V CERMAIC SMD SIZE 0805 | YAGEO/MURATA | ||
| 10 | 1 | C8 | 100uF/35V ELECTROLYTIC DIA 8MM | KEMET | 399-ESC107M035AG3EATB-ND | |
| 11 | 1 | D1 | LED RED SMD SIZE 0805 | OSRAM | 475-1278-1-ND | |
| 12 | 2 | D2,D3 | SS34 SMD FAST DIODE | ONSEMI | SS34FSCT-ND | |
| 13 | 1 | J1 | 2 PIN MALE HEADER PITCH 2.54MM | WURTH | 732-5315-ND | |
| 14 | 1 | L1 | 600 Ohms @ 100 MHz 1.5A 100mOhm | LAIRD | 240-2390-1-ND | |
| 15 | 1 | L2 | 220uH/1.2AMP 10MMX10MM | WURTH | 732-4110-1-ND | |
| 16 | 1 | R1 | 1K 5% SMD SIZE 0805 | YAGEO/MURATA | ||
| 17 | 3 | R2,R3,R4 | 1E 1% SMD SIZE 1206 | YAGEO/MURATA | ||
| 18 | 1 | R5 | DNP | |||
| 19 | 1 | R6 | 3.6K 1% SMD SIZE 0805 | YAGEO/MURATA | ||
| 20 | 1 | R7 | 1.2K 1% SMD SIZE 0805 | YAGEO/MURATA | ||
| 21 | 1 | U1 | TEENSY4.1 | PJRC | 1568-DEV-16996-ND | |
| 22 | 1 | U2 | L1117-3.3V | TI | LM1117MPX-3.3/NOPBCT-ND | |
| 23 | 1 | U3 | MC34063 SOIC8 | TI | 296-17765-1-ND | |
| 24 | 1 | SHUNT | SHUNT FOR JUMPER J1 | SULLINS CONNECT | S9001-ND |
Connections
Gerber View
Photos
Can i get the files for this to have a few made for personal use. im wanting to use PCBway
You may download the Gerbers from Gerber View section.
I would like to build this as well but the PCB manufacturing company is asking for files that I do not see. Thank you.
Download Gerber here: https://www.electronics-lab.com/wp-content/uploads/2024/11/GERBER-9.zip
how can I buy these boards please?
I got the gerber file, but I wanted to order a presoldered pcb from jlcpcb, can I please get a BOM and Placement file