use split to split string to char???

[vin_akleh]

example:
s1=split("a/b2,E",
how can i split "a/b2,E"
to
s1(0)='a'
s1(1)='/'
s1(2)='b'
s1(3)='2'
s1(4)=','
s1(5)='E'

thanks is advanced