Electronic system comprised of a microphone, microcontroller, digital signal transmitter, control board, and a power source that activates lights on a basketball backboard or other selected location, namely, a football goalpost, hockey goal net, or soccer goal net, when a referee blows their whistle to alert players.

'activ':18 'alert':46 'backboard':23 'basketbal':22 'blow':42 'board':12 'compris':3 'control':11 'digit':8 'electron':1 'footbal':30 'goal':33,37 'goalpost':31 'hockey':32 'light':19 'locat':27 'microcontrol':7 'microphon':6 'name':28 'net':34,38 'player':47 'power':15 'refere':41 'select':26 'signal':9 'soccer':36 'sourc':16 'system':2 'transmitt':10 'whistl':44

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