Teensy 4.1

• Quick overview
• Connections
  • Switches
    • Analog inputs
  • Rotary encoders
  • Potentiometers
  • FSRs
  • PWM outputs
  • Traffic indicators
  • I2C
  • DIN MIDI
  • Touchscreen
  • Bootloader switch
• Flashing
• Notes

Quick overview

• OpenDeck target name: teensy41
• Power: Micro USB
• MCU: MIMXRT1062
• MIDI: USB, DIN
• OSC: No
• Traffic indicators: 1
• Digital inputs: 9
• Outputs: 10 (PWM / level control)
• Analog inputs: 16
• Board docs: Teensy 4.1
• Buy links:
  • Sparkfun

Connections

Pinout to use as an reference to pins in later sections:

Switches

Switch #	Pin 1	Pin 2
0	2	GND
1	3	GND
2	4	GND
3	5	GND
4	6	GND
5	9	GND
6	10	GND
7	11	GND
8	12	GND

Analog inputs

Switch #	Pin 1	Pin 1	Pin 2
9	14	GND with 10k resistor	3V
10	15	GND with 10k resistor	3V
11	16	GND with 10k resistor	3V
12	17	GND with 10k resistor	3V
13	18	GND with 10k resistor	3V
14	19	GND with 10k resistor	3V
15	20	GND with 10k resistor	3V
16	21	GND with 10k resistor	3V
17	22	GND with 10k resistor	3V
18	23	GND with 10k resistor	3V
19	26	GND with 10k resistor	3V
20	27	GND with 10k resistor	3V
21	38	GND with 10k resistor	3V
22	39	GND with 10k resistor	3V
23	40	GND with 10k resistor	3V
24	41	GND with 10k resistor	3V

Rotary encoders

Encoder #	Pin 1	Pin 2	Pin 3
0	2	GND	3
1	4	GND	5
2	6	GND	9
3	10	GND	11

Potentiometers

Potentiometer #	Pin 1	Pin 2	Pin 3
0	3V	14	GND
1	3V	15	GND
2	3V	16	GND
3	3V	17	GND
4	3V	18	GND
5	3V	19	GND
6	3V	20	GND
7	3V	21	GND
8	3V	22	GND
9	3V	23	GND
10	3V	26	GND
11	3V	27	GND
12	3V	38	GND
13	3V	39	GND
14	3V	40	GND
15	3V	41	GND

FSRs

FSR #	Pin 1	Pin 2	Pin 2
0	3V	14	GND with 1k resistor
1	3V	15	GND with 1k resistor
2	3V	16	GND with 1k resistor
3	3V	17	GND with 1k resistor
4	3V	18	GND with 1k resistor
5	3V	19	GND with 1k resistor
6	3V	20	GND with 1k resistor
7	3V	21	GND with 1k resistor
8	3V	22	GND with 1k resistor
9	3V	23	GND with 1k resistor
10	3V	26	GND with 1k resistor
11	3V	27	GND with 1k resistor
12	3V	38	GND with 1k resistor
13	3V	39	GND with 1k resistor
14	3V	40	GND with 1k resistor
15	3V	41	GND with 1k resistor

PWM outputs

Note: current-limiting resistors for LEDs are required in order to avoid damage to the board.

Output #	Anode	Cathode
0	28	GND
1	29	GND
2	30	GND
3	31	GND
4	32	GND
5	33	GND
6	34	GND
7	35	GND
8	36	GND
9	37	GND

Traffic indicators

Indicator	LED
USB input	13
USB output	13
DIN input	13
DIN output	13

I2C

Signal	Pin
Vcc	3V
GND	GND
SDA	25
SCL	24

DIN MIDI

This board doesn't have DIN MIDI connectors, so they have to be added to the board with the corresponding circuitry. Use this schematic:

MIDI In	MIDI out
7	8

Touchscreen

Screen	Pin
Vcc	5V
GND	GND
Rx	8
Tx	7

Bootloader switch

Hold OpenDeck switch 0 / 2 low while resetting or powering the board to enter the OpenDeck bootloader.

Flashing

To flash this board with the OpenDeck firmware, go to the OpenDeck configurator and follow the instructions.

Notes

The teensy41 target uses the Teensy 4.1-only extra header pins near the SD socket: 34, 35, 36, and 37.

DIN MIDI and touchscreen use the same UART pins on this board, so only one of them can be enabled at a time.