Controlling 12v fan with temp sensor. noob

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hey guys trying control 12v fan arduino uno. supply using given in picture below. ac 230 v 50 hz 12v. written strickly indoor use only. controlling need have common reference need connect ground pin of sanyo adapter gnd pin of arduino uno. safe connect. not know regulated or unregulated supply.  using transistor pn2222a. circuit absolutely  correct not question me circuit.

the photo useless. it's taken far away. take close , don't post unless can read label.


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