Setting up the hardware

I have started working on measuring the electricity that would be going through the valve on the hose i have. I've gotten the measurements (6 volt battery, 0.2 miliamp current = 30 ohms of resistance) and have a transistor I could hook up to the coil in order to get everything working. The GPIO pin from the raspberry pi I am using dosent output enough current, so I need the transistor to amplify its flow.





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