Dark & Light Detector Circuit
This circuit uses a 555 timer which is a type of transistor to detect light intensity through an LDR. If there is no light at all shown upon the LDR, the transistor saturates and powers the red LED as well as the motor. If there is concentrated light on the LDR, the yellow LED will turn on as well as the motor will keep going.
Add Wire Connecting to Negative Terminal
Components/Materials Added:
- Breadboard
- Orange Wire
Add 555 Timer
Components/Materials Added:
- Breadboard
- Orange Wire
- 555 Timer
Add 1k Resistor
Components/Materials Added:
- Breadboard
- Orange Wire
- 555 Timer
- 1k Resistor
Add 1 of 2 LED
Components/Materials Added:
- Breadboard
- Orange Wire
- 555 Timer
- 1k Resistor
- Green LED
Add Wire Over 555 Timer
Components/Materials Added:
- Breadboard
- Orange Wire
- 555 Timer
- 1k Resistor
- Green LED
- Green Wire
Add Wire With One End Connecting to 555 Timer
Components/Materials Added:
- Breadboard
- Orange Wire
- 555 Timer
- 1k Resistor
- Green LED
- Green Wire
- Red Wire
Add LDR Connecting to Positive Terminal
Components/Materials Added:
- Breadboard
- Orange Wire
- 555 Timer
- 1k Resistor
- Green LED
- Green Wire
- Red Wire
Add Wire and the Other LED
Components/Materials Added:
- Breadboard
- Orange Wire
- 555 Timer
- 1k Resistor
- Green LED
- Green Wire
- Red Wire
- LDR
- Purple Wire
- White LED
Add Wire Connecting Another Wire and LDR in Parallel
Components/Materials Added:
- Breadboard
- Orange Wire
- 555 Timer
- 1k Resistor
- Green LED
- Green Wire
- Red Wire
- LDR
- Purple Wire
- White LED
- Black Wire
Add 1st of the 3 550 Ohms Resistor
Components/Materials Added:
- Breadboard
- Orange Wire
- 555 Timer
- 1k Resistor
- Green LED
- Green Wire
- Red Wire
- LDR
- Purple Wire
- White LED
- Black Wire
- (1) 550 Ohms Resistor
Add 2nd of the 3 550 Ohms Resistor
Components/Materials Added:
- Breadboard
- Orange Wire
- 555 Timer
- 1k Resistor
- Green LED
- Green Wire
- Red Wire
- LDR
- Purple Wire
- White LED
- Black Wire
- (1) 550 Ohms Resistor
- (1) 550 Ohms Resistor
Add 3rd of the 3 550 Ohms Resistor
Components/Materials Added:
- Breadboard
- Orange Wire
- 555 Timer
- 1k Resistor
- Green LED
- Green Wire
- Red Wire
- LDR
- Purple Wire
- White LED
- Black Wire
- (1) 550 Ohms Resistor
- (1) 550 Ohms Resistor
- (1) 550 Ohms Resistor
Add Motor With Negative and Positive Wires Connected to Their Corresponding Terminals
Components/Materials Added:
- Breadboard
- Orange Wire
- 555 Timer
- 1k Resistor
- Green LED
- Green Wire
- Red Wire
- LDR
- Purple Wire
- White LED
- Black Wire
- (1) 550 Ohms Resistor
- (1) 550 Ohms Resistor
- (1) 550 Ohms Resistor
- Motor
Add Battery With Negative and Positive Wires Connected to Their Corresponding Terminals
Components/Materials Added:
- Breadboard
- Orange Wire
- 555 Timer
- 1k Resistor
- Green LED
- Green Wire
- Red Wire
- LDR
- Purple Wire
- White LED
- Black Wire
- (1) 550 Ohms Resistor
- (1) 550 Ohms Resistor
- (1) 550 Ohms Resistor
- Motor
- 9V Battery