# Hardware

# Parts list

# Minimal setup (Basis)

Quantity	Name	Link	Notice
1	WS2812B LED Matrix 8x32	Amazon (opens new window) AliExpress (opens new window)
4	WS2812B LED Matrix CJMCU 8x8	Amazon (opens new window) AliExpress (opens new window)	alternative
4	MicroMatrix by foorschtbar 8x8	GitHub (opens new window)	alternative (really micro)
1	Wemos D1 Mini (or Clone)	Amazon (opens new window) AliExpress (opens new window)
1	Capacitor 1000uF/6.3V or higher	Amazon (opens new window) AliExpress (opens new window)

# Wiring

Wemos	Matrix	Function
5V	VCC	Power supply (+)
G	GND	Power supply (-)
D2	DIN	Data In

TIP

If you reduce the brightness of the matrix, powering everything via USB should be sufficient for testing. However, it is recommended to use a high-quality power supply for normal operation. A 20W (5V/4A) power supply is sufficient for this.

TIP

The 1000uF capacitor prevents the initial onrush of current from damaging the pixels. It also provides a small power reservoir for abrupt changes in brightness that the power source might not otherwise handle. Otherwise it can happen that the microcontroller restarts or it comes to gliches in the matrix.

# LDR GL5516 Sensor upgrade (brightness lux)

Quantity	Name	Link
1	LDR GL5516	Amazon (opens new window) AliExpress (opens new window)
1	Resistor 10k Ohm	Amazon (opens new window) AliExpress (opens new window)

# Wiring

Wemos	LDR GL5516	Resistor 10k Ohm	Function
3V3	Leg 1
G	-	Leg 1
A0	Leg 2	Leg 2	Acts as a voltage divider

# DHT22 Sensor upgrade (Temperature & Humidity)

Quantity	Name	Link
1	DHT22	Amazon (opens new window) AliExpress (opens new window)
1	Resistor 4.7k Ohm	Amazon (opens new window) AliExpress (opens new window)

# Wiring

Wemos	DHT22	Function
3V3	VCC	Power supply (+)
G	GND	Power supply (-)
D1	DATA

# BME280 Sensor upgrade (Temperature, Humidity & Pressure)

Quantity	Name	Link
1	BME280 3.3V	Amazon (opens new window) AliExpress (opens new window)

# Wiring

Wemos	BME280	Function
3V3	VCC	Power supply (+)
G	GND	Power supply (-)
D1	SCL	Clock
D3	SDA	Data

# BME680 Sensor upgrade (Temperature, Humidity, Pressure & Gas)

Quantity	Name	Link
1	BME680	Amazon (opens new window) AliExpress (opens new window)

# Wiring

Wemos	BME680	Function
3V3	VCC	Power supply (+)
G	GND	Power supply (-)
D1	SCL	Clock
D3	SDA	Data

# DFPlayer Mini upgrade (MP3 Player)

Quantity	Name	Link
1	DFPlayer Mini MP3 Player	Amazon (opens new window) AliExpress (opens new window)

# Wiring

Wemos	DFPlayer Mini	Function
3V3	VCC	Power supply (+)
G	GND	Power supply (-)
D5	RX	PixelIt TX -> DFPlayer RX
D7	TX	PixelIt RX <- DFPlayer TX

# Touch Buttons upgrade (Touch Sensor)

Quantity	Name	Link
1	TTP223 Touch Sensor	Amazon (opens new window) AliExpress (opens new window)

# Wiring

Wemos	Button left	Button middle	Button right	Function	Note
3.3V	VCC	VCC	VCC	Power supply (+)
G	GND	GND	GND	Power supply (-)
D0	I/O	-	-	Touch signal
D4	-	I/O	-	Touch signal	Solder bridge A
D8	-	-	I/O	Touch signal

Disclaimer

The touch sensors have two solder bridges on the board which can be connected. This allows switching between active high (when pressing high) and active low (when pressing low). This is absolutely necessary for the middle sensor (Btn 2), otherwise the wemos will not start. To prevent this, bridge A of the middle touch sensor must be closed. This sets the I/O pin to active low. Other touch sensors are not recommended, because they have no possibility to be set to active low.

TTP223 Image for Fritzing by rbricheno (opens new window).

# 3D Printing Files

by PlastikJunkies

# Downloads

# AWTRIX Case (Discontinued project!)

Thingiverse (opens new window)

# Makes

Make sure to check out this discussion page for some inspiration.

Show your PixelIt (opens new window)

# Troubleshooting

See Troubleshooting.

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