CD Smart

EGYPT • + Follow

Sergio Oliveira

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CD Smart

EGYPT
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Description

Police lighting

The circuit that switches between red and blue lights to simulate police lights using the ESP8266 controller and the PNP transistor 2N2222 can be described as follows:

ESP8266: Acts as the main controller in the circuit. It can be used to control the light state (red or blue) and send control signals to the transistor.

PNP Transistor 2N2222: Used to control the current flow to the LEDs. The transistor acts as a switch to control the on/off state of the current by controlling the base current (small current) using a signal from the ESP8266.

Red and Blue LEDs: Used to simulate police lights. The red and blue LEDs can be connected in the same circuit, and the current is switched between them using the transistor.

Resistors: Resistors are used to control the base current of the transistor and ensure its proper operation.

Power Source: A suitable power source should be provided to power the circuit, supply the LEDs and ESP8266.

Code

C/C++

#define LEDb D1
#define LEDb2 D2
#define LEDr D5
#define LEDr2 D6
#define d 75

void setup() {
  pinMode(LEDb, OUTPUT);
  pinMode(LEDb2, OUTPUT);
  pinMode(LEDr, OUTPUT);
  pinMode(LEDr2, OUTPUT);
}

void loop() {
  digitalWrite(LEDb, HIGH);
  digitalWrite(LEDb2, HIGH);
  delay(d);
  digitalWrite(LEDb, LOW);
  digitalWrite(LEDb2, LOW);
  delay(d);

  digitalWrite(LEDb, HIGH);
  digitalWrite(LEDb2, HIGH);
  delay(d);
  digitalWrite(LEDb, LOW);
  digitalWrite(LEDb2, LOW);
  delay(d);

  digitalWrite(LEDr2, HIGH);
  digitalWrite(LEDr, HIGH);
  delay(d);
  digitalWrite(LEDr2, LOW);
  digitalWrite(LEDr, LOW);
  delay(d);

  digitalWrite(LEDr2, HIGH);
  digitalWrite(LEDr, HIGH);
  delay(d);
  digitalWrite(LEDr2, LOW);
  digitalWrite(LEDr, LOW);
  delay(d);
}

Schematic and Layout

Schematic_R_B Flasher.png

CAD-Custom parts and enclosures

Top

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Download Gerbers Download BOM(Bill of materials)

Feb 04,2024

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Police lighting

1390

Published: Feb 04,2024

Standard PCB

Download Gerber file 16

BOM(Bill of materials)

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File Last Updated: 2024/02/05 (GMT+8)

File update record

2024-02-0517:16:45

Parts List (BOM) is updated.

2024-02-0517:16:45

CAD or technical drawing file is updated.

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