FLAME Click

How does it work?

Flame Click is based on the PT334-6B, a high-speed and high sensitive NPN silicon phototransistor from Everlight Electronics, which detects and responds to the presence of a flame. The PT334-6B is covered in black epoxy, making it sensitive to visible and near-infrared light. Based on a phototransistor, this flame detector has a faster reaction time than smoke or heat detectors, which can identify smokeless liquid and smoke that can create open fire.

This Click board™ operates in two ways. It can output a continuous analog signal from the phototransistor to the analog mikroBUS™ line or send an interrupt to the target board MCU through an interrupt pin routed to the INT pin of the mikroBUS™ socket. Flame Click also has a small potentiometer that allows you to set the exact threshold that will trigger the interrupt and calibrate the sensor for the environment in which you’ll be using it. This will require fine-tuning as the phototransistor will be sensitive to the surrounding thermal radiation. Properly calibrated, Flame Click can be used in various safety applications. A flame alert function is also visually presented by a red LED marked as FLAME, responding to the presence of a flame.

This Click board™ can operate with both 3.3V and 5V logic voltage levels selected via the PWR SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the communication lines properly. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development.

Specifications

Pinout diagram

This table shows how the pinout on Flame Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
Analog Signal	AN	1	AN	PWM	16	NC
	NC	2	RST	INT	15	INT	Interrupt
	NC	3	CS	RX	14	NC
	NC	4	SCK	TX	13	NC
	NC	5	MISO	SCL	12	NC
	NC	6	MOSI	SDA	11	NC
Power Supply	3.3V	7	3.3V	5V	10	5V	Power Supply
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

Flame Click electrical specifications

Software Support

We provide a library for the FLAME Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for FLAME Click driver.

Key functions

• Check the flame status function.

• Get interrupt status.

Example Description

This application detects fire.

 void application_task ( void ) 
 { 
     //  Task implementation. 

     flame_state = flame_check_status ( &flame ); 

     if ( ( flame_state == 1 ) && ( flame_state_old == 0) ) 
     { 
         log_printf( &logger, "  ~  FLAME   ~ rn " ); 

         flame_state_old = 1; 
     } 

     if ( ( flame_state == 0 ) && ( flame_state_old == 1 ) ) 
     { 
         log_printf( &logger, "   NO FLAME  rn " ); 
         flame_state_old = 0; 
     } 
 }

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.Flame

Additional notes and informations

Depending on the development board you are using, you may need USB UART click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.

mikroSDK

This Click board™ is supported with mikroSDK – MikroElektronika Software Development Kit. To ensure proper operation of mikroSDK compliant Click board™ demo applications, mikroSDK should be downloaded from the LibStock and installed for the compiler you are using.

For more information about mikroSDK, visit the official page.