Teensy 4 Expansion Board with DC-DC Converter
- Rajkumar Sharma
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- 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. | REF | DESC | MANUFACTURER | SUPPLIER | SUPPLIER PART NO |
---|---|---|---|---|---|---|
1 | 6 | CN1,CN2,CN3,CN4,CN5,CN6 | 14 PIN MALE HEADER PITCH 2.54MM | WURTH | 732-5325-ND | |
2 | 1 | CN7 | 2 PIN SCREW TERMINAL PITCH 5.08MM | PHOENIX | 277-1247-ND | |
3 | 1 | CN8 | 2 PIN MALE HEADER PITCH 2.54MM | WURTH | 732-5315-ND | |
4 | 4 | C1,C3,C7,C10 | 100nF/50V CERAMIC SMD SIZE 0805 | YAGEO/MURATA | ||
5 | 2 | C2,C6 | 10uF/25V CERMAIC SMD SIZE 0805 | YAGEO/MURATA | ||
6 | 2 | C4,C5 | 22uF/10V CERAMIC SMD SIZE 1206 | YAGEO/MURATA | ||
7 | 1 | C8 | 22uF/35V CERAMIC SMD 1210 OR 1206 | YAGEO/MURATA | ||
8 | 1 | C9 | 470PF/50V CERAMIC SMD SIZE 0805 | YAGEO/MURATA | ||
9 | 1 | D1 | SS34 SMD FAST DIODE | ON SEMI | SS34FSCT-ND | |
10 | 1 | D2 | LED RED SIZE 0805 | OSRAM | 475-1278-1-ND | |
11 | 1 | J1 | 2 PIN MALE HEADER 2.54MM (5V JUMPER) | WURTH | 732-5315-ND | |
12 | 1 | L1 | F-BEAD 600 Ohms @ 100 MHz, 1.5A 100mOhm | LAIRD | 240-2390-1-ND | |
13 | 1 | L2 | 10uH/5.7A SMD OR THT DIA. 8MM DIA | PANASOIC | P17067CT-ND | |
14 | 1 | R1 | 1K 5% SMD SIZE 0805 | YAGEO/MURATA | ||
15 | 1 | R2 | 43K 1% SMD SIZE 0805 | YAGEO/MURATA | ||
16 | 1 | R3 | 51K 1% SMD SIZE 0805 | YAGEO/MURATA | ||
17 | 1 | R4 | DNP | |||
18 | 1 | R5 | 8.06K 1% SMD SIZE 0805 | YAGEO/MURATA | ||
19 | 1 | R6 | 1M 5% SMD SIZE 0805 | YAGEO/MURATA | ||
20 | 1 | R7 | 20E 5% SMD SIZE 0805 | YAGEO/MURATA | ||
21 | 1 | U1 | TEENSY4 | PJRC | 1568-DEV-16997-ND | |
22 | 1 | U2 | L11173.3V | ST | 497-17239-1-ND | |
23 | 1 | U3 | MPQ4420A | MPS | 1589-1788-1-ND | |
24 | 1 | SHUNT | SHUNT FOR JUMPER J1 | SULLINS CONNECT | S9001-ND |
Connections
Gerber View
Photos
Video
Teensy 4 Datasheet
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