Tuesday 19 September 2017

bjt - Can a lightning detector's transistors be substituted with BC547 or 2N3904?


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I want to build this circuit, but I don't have the proper transistors. Can general purpose transistors like 2N3904, 2N4401, BC547, 2N2222, etc. be used instead of the BC109 in this circuit?


The circuit is a lightning detector.




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