Battery-Powered Motion-Activated LED Light with PIR Sensor

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Circuit Documentation

Summary

This document provides a detailed description of a simple motion-activated LED circuit. The circuit uses a PIR (Passive Infrared) motion sensor to detect motion and subsequently light up an LED. The circuit is powered by a 9V battery and includes a resistor to limit the current flowing through the LED.

Component List

PIR/Motion Sensor
- Pins: GND, OUTPUT, VCC
- Description: A sensor that detects motion by measuring infrared light radiating from objects in its field of view.
- Purpose in Circuit: Detects motion and sends a signal to activate the LED.
9V Battery
- Pins: -, +
- Description: A power source providing 9 volts of DC power.
- Purpose in Circuit: Supplies power to the entire circuit.
LED: Two Pin (red)
- Pins: cathode, anode
- Description: A light-emitting diode that emits red light when current flows through it.
- Purpose in Circuit: Lights up when motion is detected.
Resistor
- Pins: pin1, pin2
- Description: A 10k Ohm resistor.
- Purpose in Circuit: Limits the current flowing through the LED to prevent damage.

Wiring Details

PIR/Motion Sensor

GND is connected to the cathode of the LED and the negative terminal of the 9V battery.
OUTPUT is connected to pin1 of the resistor.
VCC is connected to the positive terminal of the 9V battery.

9V Battery

- is connected to the GND pin of the PIR sensor and the cathode of the LED.
+ is connected to the VCC pin of the PIR sensor.

LED: Two Pin (red)

cathode is connected to the GND pin of the PIR sensor and the negative terminal of the 9V battery.
anode is connected to pin2 of the resistor.

Resistor

pin1 is connected to the OUTPUT pin of the PIR sensor.
pin2 is connected to the anode of the LED.

Code

There is no microcontroller code associated with this circuit.

This document provides a comprehensive overview of the components and wiring details for a motion-activated LED circuit. The PIR sensor detects motion and activates the LED, with a resistor in place to limit the current and protect the LED. The circuit is powered by a 9V battery.