Motors, Drivers and Motion

10 Lektionen in dieser Stufe

1. DC Motor Behaviour: Stall Current, Back-EMF and Electrical Noise
   Read motor data and predict current at start-up and under load. · Lab: Measure free-running and stalled current of a geared motor with a multimeter.
2. Logic-Level MOSFETs for Heavy Loads
   Choose and wire a MOSFET with gate resistor and pull-down for multi-amp loads. · Lab: PWM a 12 V load such as an LED strip or motor in one direction and check the MOSFET stays cool.
3. H-Bridges: Direction and Speed with TB6612 and L298N Drivers
   Control direction and speed and compare driver losses. · Lab: Drive a motor forwards and backwards with both drivers and measure the voltage reaching the motor.
4. Soft Start, Braking and Coasting
   Shape motor behaviour with ramps and the driver's stop modes. · Lab: Implement a ramped start and compare brake and coast stopping distances.
5. Stepper Motor Principles with a 28BYJ-48 and ULN2003
   Explain coils, steps and step sequences and drive a geared stepper. · Lab: Rotate exactly one revolution in full-step and half-step sequences.
6. Driving a NEMA 17 Stepper with an A4988 and Setting Its Current Limit
   Use a step and direction driver, set microstepping and adjust the current reference safely. · Lab: Set the current limit by measuring the reference voltage, then run the motor at three microstep settings.
7. Acceleration Profiles with a Stepper Library
   Move to target positions with acceleration so steps are not lost. · Lab: Shuttle a stepper between two positions at a speed that stalls without ramping.
8. Many Servos at Once with a PCA9685 Driver
   Generate 16 servo signals over I2C and power them from a suitable supply. · Lab: Calibrate pulse limits for four servos and move them smoothly in step.
9. Measuring Motor Current with an INA219 Sensor
   Monitor voltage, current and power on the supply side of a load. · Lab: Plot motor current during start, run and stall.
10. Homing with Limit Switches and Detecting a Stall
    Establish a known position at start-up and stop on overload. · Lab: Home a stepper axis onto a microswitch and stop a DC motor when current exceeds a limit.

Abschlussprojekt

A desktop robot arm on a homed stepper turntable with joystick control, smooth servo motion and stored positions that replay on demand.

Teile für diese Stufe

• 1 × UNO-compatible board
• 1 × USB cable matching the board
• 1 × Solderless breadboard 830 points
• 1 × Jumper wire set male-male and male-female
• 2 × Geared DC motor 6 V
• 1 × Logic-level N-channel MOSFET module
• 1 × TB6612FNG dual motor driver module
• 1 × L298N dual motor driver module
• 1 × Stepper motor 28BYJ-48 with ULN2003 driver board
• 1 × Stepper motor NEMA 17
• 1 × A4988 stepper driver module
• 2 × Electrolytic capacitor 100 microfarad
• 1 × PCA9685 16-channel servo driver module
• 1 × Robot arm kit with four servos
• 1 × INA219 current sensor module
• 2 × Microswitch limit switch
• 2 × Analog joystick module
• 1 × Bench or plug-in power supply 12 V 2 A
• 1 × External 5 V power supply 3 A
• 1 × Digital multimeter
• 1 × Small screwdriver set

In jeder Lektion legst du die passenden Teile direkt in den Warenkorb. Arduino-kompatibel →