Need help with MOSFETs and photoresistors

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A high school student is building a light-steered robot using photoresistors and MOSFETs but struggles with the circuit connections on a breadboard. The discussion highlights the function of MOSFETs as switches, emphasizing the importance of correct pin connections and the role of gate voltage in activating the MOSFET. Participants clarify the differences between N-channel and P-channel MOSFETs, providing guidance on schematic corrections and resistor values. After several troubleshooting steps, the student successfully connects the components and adjusts the circuit to work correctly. The thread concludes with encouragement for the student to finalize the project.
  • #31
And here is the correct schematic.
qn7Rk08.png
 

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  • #32
Nice job, @hugo_faurand. Now you have to get the real one built and working.

Please let us know how it turns out.

Cheers
Tom
 
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