How do you make an automatic street light with LDR?
How do you make an automatic street light with LDR?
Requirements:
- LDR Light Dependent Resistor.
- Take 2 transistors.
- Resistor- 1K, 330Ohm, 470 ohm.
- Light emitting diode (LED) – Any color.
- Connecting wires- Use single-core plastic-coated wire of 0.6mm diameter (the standard size)-You can use wire that is used for Computer Networking.
- Power supply-6V or 9V.
What happens with pin 3 on the 555 IC?
Sinking and Sourcing the 555 Timer Output In the first circuit above, the LED is connected between the positive supply rail ( +Vcc ) and the output pin 3. This means that the current will “Sink” (absorb) or flow into the 555 timer output terminal and the LED will be “ON” when the output is “LOW”.
What is the pin out for the 555 timer IC?
Pinout
| 555 pin# | 556:1st pin# | Pin name |
|---|---|---|
| 1 | 7 | GND |
| 2 | 6 | TRIGGER |
| 3 | 5 | OUTPUT |
| 4 | 4 | RESET |
What is the function of IC 555 Pin No 8?
Basics of 555 Timer IC
| Pin no | Pin name | function |
|---|---|---|
| 6 | Threshold | Threshold comparator input pin. Positive trigger (>2/3 Vcc) is applied in bistable operation |
| 7 | Discharge | Discharge pin. Provides discharge path to external capacitor |
| 8 | Vcc | For +Ve biasing voltage. Between 4.5 V to 16 V |
Is there an automatic street light using 555 timer circuit?
This Electronics Mini Project includes Automatic Street Light using 555 Timer Circuit IC. Normally the turning on/off of the light is done manually using a switch whenever there is need of a light. But here we have designed a system where there is automatic turning on and off of the light whenever required.
Is there an automatic street light control circuit?
This is a small low-cost automatic street light controller circuit based on the 555 timer and an LDR. Apart from the street lights, this circuit can be used in areas where you need to control anything on the light basis. So many other projects can be built using the 555 Timer IC.
How does LDR work with 555 timer IC?
In the circuit, we created a voltage divider using LDR and a resistor + potentiometer. It is then connected to Pin-4 (reset) of 555 timer IC. So when it’s dark, the LDR’s resistance increases and so the voltage at the voltage divider drops below 0.8V, causing the 555 timer IC to turn OFF.
How to make a light sensor circuit using LDR?
In this tutorial we’ll learn how to make a light sensor circuit using LDR (Light Dependent Resistor), 555 timer IC and a few other electronics components. This circuit detects light incident on the LDR and turns on LED whenever the intensity of light is greater than a certain level.