Fire detector solution based on ATMEL ATTINY441-SSU
Principle of fire detector
Temperature-sensitive fire detectors (referred to as temperature sensors) mainly use thermal sensors to detect fires.
In the initial stage of the fire, a large amount of smoke is generated, and the substance releases a large amount of heat during the combustion process, so the ambient temperature rises sharply.
The thermal element in the detector undergoes a physical change, thereby converting the temperature signal into an electrical signal and performing an alarm process.
The introduction of ATTINY441-SSU
ATTINY441-SSU is 8-bit AVR Microcontroller with 4/8K Bytes In-System Programmable Flash.
ATtiny441 is a low-power CMOS 8-bit microcontrollers based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATtiny441/841 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.
The AVR core combines a rich instruction set with 32 general purpose working registers. All 32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent registers to be accessed in a single instruction,executed in one clock cycle. The resulting architecture is compact and code efficient while achieving throughputs up to ten times faster than conventional CISC microcontrollers.
ATtiny441/841 provides the following features: 4K/8K bytes of in-system programmable Flash
256/512 bytes of SRAM data memory
256/512 bytes of EEPROM data memory
12 general purpose I/O lines
32 general purpose working registers
One 8-bit timer/counter with two PWM channels
Two 16-bit timer/counters with two PWM channels
Internal and external interrupts
One 10-bit ADC with 5 internal and 12 external channels
One ultra-low power, programmable watchdog timer with internal oscillator
Two programmable USARTs with start frame detection
Slave Two-Wire Interface (TWI)
Master/slave Serial Peripheral Interface (SPI)
Calibrated 8MHz oscillator
Calibrated 32kHz, ultra low power oscillator
Four software selectable power saving modes.
The block diagram of Fire detector based on ATMEL ATTINY441-SSU
The core advantages of the application solution:
This solution can be used to:
Fire detector market
Home security alarm