Not reading MCP3008 analog input - Raspberry Pi Forums

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for beginners me. spent 2 hours troubleshooting thought wiring/coding problem because using viaboot breadboard , ribbon raspberry pi + mcp3008 + potentiometer + photo resistor.
anyways, number seemed either go crazy being reported mcp3008 or reporting lowest number... 0.0005...
ended being breadboard divided 2 sections rails power , ground , "sensor" part (potentiometer or resistor) using other part of board. finally, decided pull out multimeter measure voltage across components , 0v. moved 1 section of breadboard , did it!
hope else can spare time spent tonight.



raspberrypi



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