Circuit Documentation

Summary

This document provides a detailed description of a circuit that includes a Reed Switch, Rocker Switch, 18650 Li-Ion battery, 7805 voltage regulator, buzzer, and BC547 transistor. The circuit is designed to control a buzzer using a Reed Switch and a BC547 transistor, powered by a 18650 Li-Ion battery and regulated by a 7805 voltage regulator.

Component List

1. Reed Switch

   • Pins: VCC, GND, DO
   • Description: A magnetic switch that closes in the presence of a magnetic field.
   • Purpose in Circuit: Detects the presence of a magnetic field to control the transistor.

2. Rocker Switch

   • Pins: 1, 2
   • Description: A manual switch that can toggle between two states.
   • Purpose in Circuit: Controls the power supply to the voltage regulator.

3. 18650 Li-Ion Battery

   • Pins: Positive, Negative
   • Description: A rechargeable lithium-ion battery.
   • Purpose in Circuit: Provides the primary power source for the circuit.

4. 7805 Voltage Regulator

   • Pins: Vin, Gnd, Vout
   • Description: A voltage regulator that outputs a stable 5V.
   • Purpose in Circuit: Regulates the voltage from the battery to a stable 5V for the circuit.

5. Buzzer

   • Pins: PIN, GND
   • Description: An audio signaling device.
   • Purpose in Circuit: Produces sound when activated.

6. BC547 Transistor

   • Pins: Collector, Base, Emitter
   • Description: A general-purpose NPN transistor.
   • Purpose in Circuit: Acts as a switch to control the buzzer based on the Reed Switch's output.

Wiring Details

Reed Switch

• VCC is connected to the PIN of the Buzzer and the Vout of the 7805 Voltage Regulator.
• GND is connected to the Emitter of the BC547 Transistor and the Negative of the 18650 Li-Ion Battery, as well as the Gnd of the 7805 Voltage Regulator.
• DO is connected to the Base of the BC547 Transistor.

Rocker Switch

• Pin 1 is connected to the Positive of the 18650 Li-Ion Battery.
• Pin 2 is connected to the Vin of the 7805 Voltage Regulator.

18650 Li-Ion Battery

• Positive is connected to Pin 1 of the Rocker Switch.
• Negative is connected to the GND of the Reed Switch, the Emitter of the BC547 Transistor, and the Gnd of the 7805 Voltage Regulator.

7805 Voltage Regulator

• Vin is connected to Pin 2 of the Rocker Switch.
• Gnd is connected to the Negative of the 18650 Li-Ion Battery, the GND of the Reed Switch, and the Emitter of the BC547 Transistor.
• Vout is connected to the PIN of the Buzzer and the VCC of the Reed Switch.

Buzzer

• PIN is connected to the VCC of the Reed Switch and the Vout of the 7805 Voltage Regulator.
• GND is connected to the Collector of the BC547 Transistor.

BC547 Transistor

• Collector is connected to the GND of the Buzzer.
• Base is connected to the DO of the Reed Switch.
• Emitter is connected to the GND of the Reed Switch, the Negative of the 18650 Li-Ion Battery, and the Gnd of the 7805 Voltage Regulator.

Code

There is no microcontroller code associated with this circuit.

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This document provides a comprehensive overview of the circuit, including a summary, detailed component list, wiring details, and code documentation.