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The NTE 291 was Cross Reference at NTE with the TIP_31C. I did reverse the diode and added one to the circuit still wont work.
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I tried everything and can not make this circuit work. My parts list are: NTE291 Transistor, NTE125 Diode, NTE 47K ohm, I am using 9volts. I have also reduced the coil in the picture 10 down to 3 with no luck. I have also tried the same circuit with a 2n2222 resistor and it overheats rite a way.
Thanks switched it to an arduino 101 and it works now. Great project, will follow..
I followed the instructions for wifi Pi3 and after uploading the arduino file and running the pi3 image file after boot of the Pi3 I get the error No serial port found. Maybe it something simple I am a newbie please help.
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