How to Program White LED Module on Kidsuno

White LED Module

LED (Light-Emitting Diode)

LED is a commonly used light emitting device that converts electrical energy into light energy. Usually, it is used as an indicator in circuits and instruments, or as part of texts or numeric display.

It generally includes gallium(Ga), arsenic(As), phosphorus(P), nitrogen(N) and so on.

Parameters

Operating voltage: DC 3.3 ~ 5 V

Operating current: 1.5 mA (Peak: 2.3mA)

Maximum power: 0.07 W

Control signal: digital signal

Dimensions: 24 x 48 x 18 mm (without housing)

Positioning holes: diameter of 4.8 mm

Interface: telephone socket

Principle

Modules with blue housing are digital ones, so we should connect to digital io pins of the mainboard (ports with blue).

In this experiment, we connect the white LED module to port 1. According to the board ports view, the digital io pin at port 1 is digital pin D5.

When we set the pin to high(1), the LED lights up in white; if we set to low(0), it will be off.

Wiring Diagram

Test Code

Click  to connect to COM port and then .

Explanation

Code Blocks

Conceive

1. Initialization

Set pin mode.

Build blocks:

① Drag  and  to the editing area.

② Click the triangle to choose pin 5.

③ Modify the mode into output .

Three pin mode:

• input

• output

• input-pullup

Q ：Why output?

A ：The code is written for the mainboard. For the board, pin D5 is outputting power levels (high or low) to the connected module.

2. Main Code

Loop: LED lights on for 1s and goes off for 1s, in a loop.

Build blocks:

① Drag .This is a loop code, in which codes will run forever.

② Drag  into “forever”.

There are two power level to output:

• high

• low

Choose pin to 5 and output high.

③ Drag  into “forever”. This is a delay code.

Q ：Why delay 1s?

A ：If you output a high level to LED, it will be always on. Yet, we add a delay of 1s, so it lights up for only 1s. Delay time is the ON/OFF time of LED.

Pin outputs high for 1s:

④ Right-click the code and choose “Duplicate”.

As follows:

Set the output to low. Pin 5 outputs low for 1s.

LED will lights on for 1s and goes off for 1s, in a loop.