What does a bike alarm need?
Alert people in the surroundings
Act as a layer of deterent
There could be a light that would light up
Lock
Make loud noises
Needs to fit a range of bikes
Buzzers / Sirens
Sensors
LED
Lightbulb
Different colours
Key
Could fit on the bike frame
Could fit on the bike handle
Could fit on the bike seat
Automaticbell
Strong locking mechanism
Could lock wheels in place
GPS tracker
Some sort of password
Combination lock