Specifications #
- Operating Voltage: 3.3 ~ 6 V
- Operating Speed: 0.12 sec / 60 degrees
- Rotation Range: Approx. -90 ~ 90 degrees
- Temperature Range: 0 ºC – 55 ºC
Wiring Connections #
| SG-90 | Raspberry Pi Pico |
|---|---|
| Orange Wire | GP0 (Depending on code) |
| Red Wire | VBUS (5V) |
| Brown Wire | GND |
PWM Control #
| Angle | Pulse Width | Duty Cycle (Pulse Width / Period) |
|---|---|---|
| -90° (Left) | 0.5ms | 0.5ms / 20ms |
| 0° (Center) | 1.45ms | 1.45ms / 20ms |
| 90° (Right) | 2.4ms | 2.4ms / 20ms |
Code #
from machine import Pin, PWM
import time
duty_max = 65025
deg_min = 0.025 # -90
deg_middle = 0.0725 # 0
deg_max = 0.12 # 90
# init
def init(pin_pwm = 0, freq = 50):
global servo
servo = PWM(Pin(pin_pwm))
servo.freq(freq)
# example function
def example(interval = 3):
servo.duty_u16(round(duty_max * deg_min))
time.sleep(interval)
servo.duty_u16(round(duty_max * deg_middle))
time.sleep(interval)
servo.duty_u16(round(duty_max * deg_max))
time.sleep(interval)Parameters #
duty_max #
The maximum duty value (100%).
deg_min #
The duty cycle at -90°.
deg_middle #
The duty cycle at 0°.
deg_max #
The duty cycle at 90°.
Functions #
init(pin_pwm = 0, freq = 50) #
An initialization function to configure the pin and frequency.
pin_pwm: The pin connected to the PWM signal wire.freq: The frequency, set here to 50Hz according to the data sheet.
example(interval = 3) #
A test function. It controls the loop between -90° -> 0° -> 90°.
interval: The rotation interval.