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Battery-Powered LED Indicator with 7805 Voltage Regulator

Image of Battery-Powered LED Indicator with 7805 Voltage Regulator

Circuit Documentation

Summary

This circuit is a simple power regulation and LED indicator circuit. It uses a 9V battery as the power source, a 7805 voltage regulator to step down the voltage to 5V, a toggle switch to control the power, and an LED with a current-limiting resistor to indicate the power status.

Component List

  1. 7805 Voltage Regulator

    • Pins: Vin, Gnd, Vout
    • Description: A voltage regulator that steps down the input voltage to a stable 5V output.
    • Purpose: To provide a stable 5V output from a 9V battery.
  2. 9V Battery

    • Pins: +, -
    • Description: A 9V battery used as the power source for the circuit.
    • Purpose: To supply power to the circuit.
  3. Toggle Switch

    • Pins: L1, COM, L2
    • Description: A switch used to control the power flow in the circuit.
    • Purpose: To turn the circuit on and off.
  4. LED: Two Pin (red)

    • Pins: cathode, anode
    • Description: A red LED used as an indicator.
    • Purpose: To indicate the power status of the circuit.
  5. Resistor

    • Pins: pin1, pin2
    • Description: A resistor with a resistance of 200 Ohms.
    • Purpose: To limit the current flowing through the LED.
  6. Vout

    • Pins: Vout
    • Description: A terminal to access the regulated 5V output.
    • Purpose: To provide a connection point for the 5V output.

Wiring Details

7805 Voltage Regulator

  • Vin: Connected to L2 of the Toggle Switch.
  • Gnd: Connected to the anode of the LED and the negative terminal of the 9V battery.
  • Vout: Connected to Vout terminal and pin1 of the Resistor.

9V Battery

  • +: Connected to COM of the Toggle Switch.
  • -: Connected to the anode of the LED and Gnd of the 7805 Voltage Regulator.

Toggle Switch

  • L1: Not connected.
  • COM: Connected to the positive terminal of the 9V battery.
  • L2: Connected to Vin of the 7805 Voltage Regulator.

LED: Two Pin (red)

  • cathode: Connected to pin2 of the Resistor.
  • anode: Connected to Gnd of the 7805 Voltage Regulator and the negative terminal of the 9V battery.

Resistor

  • pin1: Connected to Vout of the 7805 Voltage Regulator.
  • pin2: Connected to the cathode of the LED.

Vout

  • Vout: Connected to Vout of the 7805 Voltage Regulator and pin1 of the Resistor.

Code

There is no microcontroller code associated with this circuit.