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Project 1: Dusk-to-Dawn Light |
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Introduction |
![]() Figure 1. Dusk-to-dawn lighting
circuit.
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Resistor and Photocell
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Step 1: Implement the voltage
divider |
Bipolar Junction Transistors
(BJTs) |
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(a) BJT symbol |
(b) PN2222 BJT |
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Figure 2. BJT symbol and physical appearance of PN2222 BJT. | ||
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Light-Emitting Diodes (LEDs)
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![]() Figure 3. LED schematic symbol and physical appearance. |
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Step 2: Add the BJT and the LED
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