Imported from GitHub: coelacant1/Protogen-Electronics · commit fcf7226 · license GPL-3.0

Description

SmartMatrix SmartLED Shield breakout for Protogen hardware

README

ProtogenControllerV1

Protogen Controller V1 with Bluetooth

General Information

This controller is used to control up to 8 WS2812 strips at 500 pixels long each. This supports an ESP32 WROVER used for communication to other wireless devices that talks to the Teensy 4.0 over Serial. Both devices have breakouts for I2C and SPI as well as all unused GPIO. The ESP32 is programmed over USB using the integrated CP2104 FTDI.

Bill of Materials

RefDes	Value	Footprint	Quantity	Description
C1, C2, C3, C4, C5, C6, C7, C8, DC1, DC2, DC3, DC4, DC5, DC6, DC7, DC8	CC0805KKX7R6BB105	0805	16	CAP CER 1UF 10V X7R
J1	47589-0001		1	Right Angle Female Type AB Micro USB Connector, 30 V, 1.8 A, -30 to 85 degC, RoHS, Tape and Reel
J1_JSTBreakout1, J1_JSTBreakout2, J1_JSTBreakout3, J1_JSTBreakout4, J1_JSTBreakout5, J1_JSTBreakout6, J1_JSTBreakout7, J1_JSTBreakout8	B3B-XH-A(LF)(SN)	2.5MM	8	CONN HEADER VERT 3POS
J2	XT30-F		1	XT30 Female connector for board mount
LED1, LED2, LED3	150080SS75000		3	SMD mono-color Chip LED, WL-SMCW, Super Red
P1	Header 16X2		1	Header, 16-Pin, Dual row
P2, P3	Header 4X2		2	Header, 4-Pin, Dual row
P4, P5	Header 6X2		2	Header, 6-Pin, Dual row
P6	Header 2		1	Header, 2-Pin
Q1, Q2	MMBT2222ALT1G	SOT-23	2	General Purpose Transistor, NPN Silicon, 3-Pin, Pb-Free, Tape and Reel
Q3	FDN339AN	SSOT3	1	MOSFET N-CH 20V 3A
Q4	FDN340P	SSOT3	1	MOSFET P-CH 20V 2A
R1, R2, R3, R4, R5, R6, R9, R10, R14, R15, R16, R17, R18, R19, R20	CRCW08050000Z0EA		15
R7, R8, R13	CAT16-103J4LF	8-Pin SMD	3	CAT / CAY 16 Series - Chip Resistor Array, 10 KOhm, +/- 5%, 50 V, -55 to 125 degC, RoHS, Tape and Reel
SW1	FSMSMTR	2-Pin SMD	1	FSMSM Push Button Switch, 50 mA, -35 to 85 degC, RoHS, Tape and Reel
U1	ESP32-WROVER-B_(16MB)		1	Generic WiFi-BT-BLE MCU module. Flash memory of 16 MB and PSRAM of 8 MB
U2	Teensy 4.0		1	RT1062 Teensy 4.0 i.MX ARM® Cortex®-M7 MPU Embedded Evaluation Board
U4	AP2112K-3.3TRG1	SOT25	1	IC REG LINEAR 3.3V 600MA
U5	CP2104-F03-GM	24-pin QFN	1	Single-Chip USB to UART Bridge, 4 Dig I/O Pins, Internal Oscillator, 1024 Bytes EEPROM, -40 to 85 degC
U6	SN74HCT245DWR	20SOIC	1	IC TXRX NON-INVERT 5.5V

Power Setup

Powering the Teensy 4.0 for Programming

For programming the Teensy 4.0, the bottom VIN from VUSB trace needs to be cut to not provide power to the LED boards and cause damage while programming.

Powering the Controller for Usage

To use the controller, 5V must be provided to the XT30 connector. Make sure you follow the standards for the XT30 polarity!

Sensors/Peripherals

Boop Sensor (APDS-9960)

The APDS-9960 is a Time-of-Flight sensor that uses an IR light to measure the distance to the object in front of it using the I2C communication protocol. This can be connected on either the Teensy I2C breakout or the ESP32 I2C breakout. The following picture shows the recommended location for the device:

MAX9814 Microphone

The MAX9814 electret microphone is a standard electret microphone with automatic gain compensation via an amplifier. This will pick up a varying range of sounds and not just your voice, so it is best to tune the software gain appropriately.

Control Button

The control button is a simple button that allows you to toggle between faces. There is no analog filtering on the button with the kit as the button debouncing is handled in code within the ButtonHandler class.

I2C OLED Display

The OLED display is a small display for mounting within the visor for the wearer to see. It is used to display the current face being displayed on the outside, status of a battery, or anything else you like. This will communicate over I2C with either the Teensy or the ESP32.

Programming the Teensy

Getting Started with ProtoTracer

Install Applications

• Install Visual Studio Code from here: Visual Studio Code
• Install TeensyDuino from here: TeensyDuino

Install Extensions

• Install PlatformIO IDE under the extensions in Visual Studio Code.
• Install C/C++ extension.

Download the Codebase

Download ProtoTracer from here: ProtoTracer. You can use either the Zip download or clone it to a local Git repository.

General Recommendations and Notes

• Do not use external power to the XT30 connector, unless it is 5V directly, the controller should be able to handle 4.5V to 5.5V but anything else is outside of specification.
• Do not short circuit the IO pins. Be careful about which pins are in use and are listed at the beginning of the guide.
• Be careful leaving the electronics in a humid environment.

Images

3D View

Wiring

Layer View

Electrical Schematic