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Battery-Powered LED Control Circuit with Push Buttons and NPN Transistors

Image of Battery-Powered LED Control Circuit with Push Buttons and NPN Transistors

Circuit Documentation

Summary

This circuit consists of various components including resistors, transistors, push buttons, an LED, and a Li-ion battery. The circuit is designed to control the LED using push buttons and transistors, with resistors used for current limiting and biasing.

Component List

  1. Resistor (220 Ohms)

    • Pins: pin1, pin2
    • Description: Current limiting resistor
  2. Resistor (1000 Ohms)

    • Pins: pin1, pin2
    • Description: Used for biasing transistors
  3. NPN Transistor (CBE)

    • Pins: collector, base, emitter
    • Description: Used for switching
  4. Push Button Round

    • Pins: leg0, leg1
    • Description: Used for user input
  5. Li-ion 18650 Battery

    • Pins: +, -
    • Description: Power source
  6. LED: Two Pin (green)

    • Pins: cathode, anode
    • Description: Visual indicator

Wiring Details

Resistor (220 Ohms)

  • pin1 is connected to:

    • Li-ion 18650 Battery (+)
    • Push Button Round (leg0)
    • Push Button Round (leg0)
  • pin2 is connected to:

    • LED: Two Pin (green) (cathode)

Resistor (1000 Ohms)

  • pin1 is connected to:

    • Push Button Round (leg1)
  • pin2 is connected to:

    • NPN Transistor (CBE) (base)

NPN Transistor (CBE)

  • collector is connected to:

    • LED: Two Pin (green) (anode)
  • base is connected to:

    • Resistor (1000 Ohms) (pin2)
  • emitter is connected to:

    • NPN Transistor (CBE) (collector)

Push Button Round

  • leg0 is connected to:

    • Resistor (220 Ohms) (pin1)
    • Li-ion 18650 Battery (+)
    • Push Button Round (leg0)
  • leg1 is connected to:

    • Resistor (1000 Ohms) (pin1)

Li-ion 18650 Battery

  • + is connected to:

    • Resistor (220 Ohms) (pin1)
    • Push Button Round (leg0)
    • Push Button Round (leg0)
  • - is connected to:

    • NPN Transistor (CBE) (emitter)

LED: Two Pin (green)

  • cathode is connected to:

    • Resistor (220 Ohms) (pin2)
  • anode is connected to:

    • NPN Transistor (CBE) (collector)

Code

No microcontroller code is provided for this circuit.


This documentation provides a detailed overview of the components and their connections within the circuit. Each component is listed with its respective pins and connections to ensure clarity in the circuit design.