Always keen to see what else I can motorise with Lego I bought the necessary bits to motorise a Lego roller coaster. I bought only the carts, track and chain links from brick link. link
I borrowed the Ferris Wheel car parts from my daughters Ferris wheel that I had previously "borrowed" to motorise. (See below)
I used some basic cogs and Lego Technic bits to drive the cars up the main ramp(see below).
I reused the Micro:bit motor controller and Micro:bit I had used previously on the Micro:bit Express and Ferris Wheel blogs(See below).
I used the following code:
from microbit import *
def stop():
pin8.write_analog(1023)
pin12.write_analog(1023)
def forward(speed):
pin8.write_analog(speed)
pin12.write_digital(0)
display.scroll(speed)
speed = 400
while True:
if button_a.was_pressed():
display.scroll('F')
forward(speed)
if button_b.was_pressed():
display.scroll('S')
stop()
Updated code for incremental speed control:
from microbit import *
def stop():
pin8.write_analog(1023)
pin12.write_analog(1023)
def forward(speed):
pin8.write_analog(speed)
pin12.write_digital(0)
display.scroll(speed)
speed = 400
while True:
if button_a.was_pressed():
speed = speed + 50
msg = "F" + str(speed)
display.scroll(msg)
if speed > 1000:
speed = 400
forward(speed)
if button_b.was_pressed():
display.scroll('S')
stop()
Over :)
