Maker Pro
Maker Pro

How to build a cell phone flashing charm?

im not so good in electronics but can i know how to build of these thing?
ww.youtube.com/watch?v=Rwp_f1Y2vM8

just helping my son in some simple project. just in case there are information that can be provided here, i might help him out a bit.

basically this thing will flash when there is an incoming call
i need information about the component required, and the circuit inside the thing

any information provided are appreciated. thanks..
 
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