Dear All,,
I would like to change transistors for detect ion positive from this circuit (please see photo) but not working.Could you help me to correct what I wrong please more detail or new other schema is better (I am new in electronic) Thank you so much
I would like to change transistors for detect ion positive from this circuit (please see photo) but not working.Could you help me to correct what I wrong please more detail or new other schema is better (I am new in electronic) Thank you so much
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