Weebot Robotstrom: ELF Mainboard and Sensors

• WEEBOT ROBOTSTROM is the title slide of the presentation

ELF Mainboard

• It's based on a modular design that allows for replacement of various modules.
• It adopts a foolproof design and the CPU has a replaceable structure.
• The CPU can be equipped with either an ATmega328P or an ATmega2560 chip, based on performance needs.
• It's compatible with Arduino, supports graphical programming, and the Arduino C language.

Double-Way Line-Following Sensor

• The sensor carries out robot patrol line, grayscale recognition, and measures robot speed.
• It utilizes infrared characteristics with an infrared emission tube and an infrared receiving tube in the detection port.
• The receiving tube converts reflected infrared, and the reflective surface is judged based on the variation of gray value information.

RGB Ultrasonic Sensor

• It performs ultrasonic ranging and inductive detection using ultrasonic waves to measure the time difference for distance.
• A unique feature is the built-in independent controllable RGB lamp in its probe, which can change color and adjust brightness.
• It can detect distances ranging from 0-160 cm.

Sound Sensor

• The function is to detect the intensity of ambient sound and convert it to an electrical signal to an analog signal value.
• It utilizes a built-in miniature microphone to amplify and filter the air's vibration frequency.
• The larger the analog value of the output, the greater the sound intensity, and vice versa.
• The sound level detected by the sensor is set to a relative reference value that ranges from 0 to 1023 in the programming environment.

Light Sensor

• Detects the intensity of ambient light based on the photoconductive effect of a semiconductor.
• The resistance value of the semiconductor changes with light intensity. A stronger light results in a smaller change in resistance.
• The larger the analog value of the output, the brighter the light.
• The brightness value detected by the sensor is set to a relative reference value which ranges from 0 to 1023.

Buzzer

• Integrated into the underside of the main control chip on the ELF mainboard.
• It is a small speaker that can generate different tones
• It can be used to write songs during programming.

Onboard RGB LED

• This LED is located below the Bluetooth 2.4G module.
• Consists of red, yellow, and blue primary colors.
• Programming can control the illumination and change the LED's color.

RGB LED 8

• RGB LED-8 is a ring board with 8 RGB LEDs.
• Can be programmed to control color and highlight changes, as well as other changes.

DC Encoder Motor Driver

• This driver is plugged into the ELF master.
• It can drive either a DC motor or code motor.

Gyroscope Sensor

• Obtains changes in acceleration and angular velocity.
• Based on the Coriolis force of physics, it measures changes in capacitance, gaining acceleration and angular velocity values.
• It calculates physical quantities like speed, angle, and displacement using formulas. Can be used to create a game or a self-balancing car.

Limit Switch

• Main function is to limit position, as it turns on and off the signals with and without are obtained to achieve control

Encoder DC Motor - 25 9V 188 RPM

• The motor has a rated voltage of 9V and a maximum no-load speed of 188 rpm.
• It has a double flat shaft structure for better gear connections.
• An encoder achieves precise speed, direction, and lap control.

DC Motor – 25 50 RPM

• The motor has a rated voltage of 9V and a maximum no-load speed of approximately 50 rpm.
• It is equipped with a double flat shaft structure that is better connected to gears.

IR Receiver

• Communication with the infrared remote control is in real-time.
• It's sensitive and can be interfered with by infrared rays under strong sunlight, leading to uncontrollability.

18650 Battery Holder

• The bottom has mounting holes.
• It can be screwed to the robot structure to provide real-time power.