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RAK14003 WisBlock LED Bar Graph Module Datasheet

Overview

Description

RAK14003 is an LED Bar Graph that is part of WisBlock Display modules. It consists of 10 configurable LEDs (5 green color LEDs, 3 yellow color LEDs, and 2 red color LEDs). RAK14003 uses the MCP23017 from Microchip as an I/O Expander and KEM-102510A-RYG from Hongke Lighting as the LED bar. Each LED in the module can be controlled separately so the module can build a multipurpose graphic feedback display.

Features

  • LED Bar Graph module
  • 5 green color LEDs, 3 yellow color LEDs,and 2 red color LEDs
  • Each LED can be controlled separately
  • 3.3 V Power supply
  • Chipset: Microchip MCP23017, Hongke Lighting KEM-102510A-RYG
  • Module size: 25 x 45 mm

Specifications

Overview

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Figure 1: RAK14003 Front and Back View

Mounting

The RAK14003 module can be mounted on the IO slot of the WisBlock Base board. Figure 2 shows the mounting mechanism of the RAK14003 on a WisBlock Base module, such as the RAK5005-O.

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Figure 1: RAK14003 Mounting Mechanism on a WisBlock Base Module

Hardware

The hardware specification is categorized into four parts. It discusses the pinouts and its corresponding functions and diagrams of the module. It also covers the electrical and mechanical characteristics that include the tabular data of the functionalities and standard values of the RAK14003 WisBlock LED Bar Graph Module.

Chipset

VendorPart number
Microchip, Hongke LightingMCP23017, KEM-102510A-RYG

Pin Definition

The RAK14003 module has a 40-pin WisConnector that is compatible to the WisBlock Base IO Slot. The pin order of the connector and the pinout definition is shown in Figure 3.

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Figure 1: RAK14003 Pinout Schematic
NOTE
  • Only I2C related pin, RESET, 3V3_S, and GND are connected to the WisConnector.
  • 3V3_S voltage output from the WisBlock Base that powers the RAK14003 module can be controlled by the WisBlock Core via WB_IO2 (WisBlock IO2 pin). This makes the module ideal for low-power IoT projects since the WisBlock Core can totally disconnect the power of the RAK14003 module.

Electrical Characteristics

This section shows the maximum and minimum ratings of the RAK14003 module and its recommended operating conditions. Refer to the table presented below.

Absolute Maximum Ratings
ParameterDescriptionMin.Nom.Max.Unit
3V3_SPower Voltage Range-0.3-5.5V
Power Supply Ratings
SymbolDescriptionConditionMin.Nom.Max.Unit
3V3_SSupply VoltageInput voltage must within this range-3.3-V
ImaxMax CurrentTurn ON all LEDs--170mA
LED Parameters

Table below shows the LED parameters. Color Code & Chip Characteristic: (Test Condition: IF=20 mA)

Emitting ColorPeak WavelengthForward VoltageLuminous Intensity

IF=20 mA (mcd)

(λp)ΔλTypMaxMax
Amber605-615301.92.430
Super Green565-575301.92.480
Super Red625-640201.82.3100
High Red640-660201.82.312
Yellow Green 570-580302.02.545
Yellow590-600352.02.560
Blue465-475403.03.5200
Pure Green515-525403.03.5600
White3.03.5180

Mechanical Characteristics

Board Dimensions

Figure 4 shows the mechanical dimensions of the RAK14003 Module.

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Figure 1: RAK14003 Mechanical Dimensions
WisConnector PCB Layout
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Figure 1: WisConnector PCB Footprint and Recommendations

Schematic Diagram

Figure 6 shows the schematic of the RAK14003 module.

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Figure 1: RAK14003 WisBlock Module Schematics
I/O Expander and LED Bar
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Figure 1: RAK14003 I/O Expander and LED Bar
NOTE
  • The current-limiting resistances are 68 Ω.
Device Address Select
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Figure 1: I2C Address Select
NOTE
  • You can change the I2C slave address. The default 7-bit I2C address is 0x24.
I2C Pull-up Resistance

The I2C Pull-up resistors already exist on the WisBlock Base, such as the RAK5005-O, not on the RAK14003 module.

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Figure 1: I2C Pull-up Resistance