View source for Team12 Vibration Motor

= Coin Vibration Motor =
The coin vibration motor (in our case the TC-9193500) is an Eccentric Rotating Mass vibration motor (ERM). An ERM uses a small unbalanced mass on a DC motor. The rotation of the mass creates a force that translates to vibrations.

== Technical Specifications ==
* shape: coin format
* size: 10 x 2,7 mm
* operating voltage: 3V

== Advantages and Disadvantages ==
=== Advantages ===
* small size
* simple to use and easy to control
* translates to a wide range of vibration amplitudes and frequencies to match any application

=== Disadvantages ===
* its amplitude is tied geometrically to the frequency and the speed, so it is not possible to alter the amplitude and frequency independently

= How to get it to work =
== Microcontroller ==
Use a microcontroller of choice. In our example below we use the [[Raspberry Pi Pico]]. 

== Wiring with a Raspberry Pi Pico ==
* If necessary, solder cable ends to jumper cables
* Connect the black cable to GND 
* Connect the red cable to GPIO
* Be careful not to connect the two cables to prevent short circuits

== Code Example ==
<syntaxhighlight lang="python" line='line'>

# import modules
from machine import Pin,PWM
from time import sleep_ms

# connect red to GPIO3 and black to GND
vib = PWM(Pin(3))
vib.freq(1000)

# for a duty cycle with 16 bit define the maximal possible value 
max_value = 65535

# for soft vibrations 30000 is a still visible value
min_value = 30000

# example vibration rhythm
# play with the sleep_ms values to change the rhythm of the vibration
# play with the duty_u16 value to define the intensity of vibration
while True:
    vib.duty_u16(max_value)
    sleep_ms(1000)
    vib.duty_u16(min_value)
    sleep_ms(1000)

</syntaxhighlight>

== Instructional Video ==
--submitted on uni2work--