RAK14012 WisBlock LED Matrix Datasheet
Overview
Description
RAK14012 is an LED matrix driver module for WS2812B LEDs, which has a control circuit and RGB chip.
To drive the WS2812B, the RAK14012 has a built-in boost circuit to generate 5 V voltage output. But it is recommended to use an external power supply to power the LED Matrix.
Features
- LED matrix driver
- 3.3 V Power supply
- Module Size: 25 mm x 15 mm
Specifications
Overview
Mounting
The RAK14012 WisBlock LED Matrix can be mounted to the IO slot of the WisBlock Base board. Figure 1 shows the mounting mechanism of the RAK14012 on a WisBlock Base board, such as the RAK5005-O.
Figure 1: RAK14012 WisBlock LED Matrix mountingHardware
Pin Definition
The RAK14012 WisBlock LED Matrix comprises a 40-pin WisConnector. The 40-pin WisConnector allows the RAK14012 module to be mounted to a WisBlock baseboard, such as RAK5005-O. The pin order of the connector and the pinout definition is shown in Figure 2.
- The VBAT, GND, EN (WB_IO6), and DOUT (WB_IO5) are connected to WisConnector.
Figure 1: RAK14012 WisBlock LED Matrix pinout| Pin Number | Description | Pin Number | Description |
|---|---|---|---|
| 1 | VBAT | 2 | VBAT |
| 3 | GND | 4 | GND |
| 5 | NC | 6 | 3V3_S (Optional) |
| 7 | NC | 8 | NC |
| 9 | NC | 10 | NC |
| 11 | NC | 12 | NC |
| 13 | NC | 14 | NC |
| 15 | NC | 16 | NC |
| 17 | NC | 18 | NC |
| 19 | NC | 20 | NC |
| 21 | NC | 22 | NC |
| 23 | NC | 24 | NC |
| 25 | NC | 26 | NC |
| 27 | NC | 28 | DOUT (optional) |
| 29 | NC | 30 | NC |
| 31 | NC | 32 | NC |
| 33 | NC | 34 | NC |
| 35 | DOUT (optional) | 36 | NC |
| 37 | DOUT (IO5) | 38 | EN (IO6) |
| 39 | GND | 40 | GND |
Electrical Characteristics
| Symbol | Description | Condition | Min. | Nom. | Max. | Unit |
|---|---|---|---|---|---|---|
| VBAT | Lithium battery output | Normal operation | 3.3 | - | 4.2 | V |
| 3V3_S | 3.3 V from WisBase | Normal operation | - | 3.3 | - | V |
| 5V | Output from boost | Normal operation | - | 5 | - | V |
Mechanical Characteristics
Board Dimensions
Figure 3 shows the dimensions and the mechanical drawing of the RAK14012 module.
Figure 1: RAK14012 WisBlock LED Matrix dimensionsWisConnector PCB Layout
Figure 1: WisConnector PCB footprint and recommendationsSchematic Diagram
It has a boost circuit to generate 5 V because the supply for WS2812B must be between 3.7 V and 5.3 V. It is recommended to use an external power source to power the LED Matrix because of its high power consumption.
Connector
Figure 1: RAK14012 connector connectionBoost
Figure 1: RAK14012 boost circuitPower Selection
Figure 1: RAK14012 power selection- Make sure that the jumper from 5V_OUT of RAK14012 WisBlock LED Matrix is disconnected when connecting to an external power supply.
- LED Matrix DIN should be connected to RAK14012 DOUT.
- LED Matrix GND should be connected to RAK14012 GND.
Connector for LED Matrix
Figure 1: RAK14012 connector for LED matrix
