hello
u may use a darlington pair of transistors which will amplify the signal , it only requires 2 power transistors, there connection can be easily available in any good electronics book . for this u may concern
ELECTRONIC DEVICES & CIRCUIT THEORY 6TH EDITION BY BOYLESTED NASHELSKY

U WILL find ur answer in that

Who on earth is "u", the question was posted by Shahzad. I see no postings by "u" in the tread
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Erik