The Nightlight – evolution of a key stage 3 project

Fig 5 Night light circuits based on a MOSFET transistor

Fig 5 Night light circuits based on a MOSFET transistor

It took several days to ponder the problem before the light dawned. Use the LDR to hold the timer circuit off. Fig 6 shows how the light sensor controls a power switch (Q2).

Fig 6 Light controlled on/off switch for the night light circuit

Fig 6 Light controlled on/off switch for the night light circuit


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