For the use of a countdown if needed, lights and buzzers
are both viable option to be used.Advantages: Size
variations Colour
options Low
and high intensity available Tinted diffused plastic CheapDisadvantages: Require integrating into a circuitAdvantages: Tinted
diffused lens Wide
viewing angle Cheap Variation
of coloursDisadvantages: Too
big Require
integrating into a circuitAdvantages: Good
sizeDisadvantages: Super
bright only available in greenAdvantages: Mounts
straight to a PCB Creates
traffic light sequence Shock
resistant High
intensity CheapDisadvantages: Mounts
straight to a PCB