i have constructed a board accordingly to the schematic shown below.
the circuit consists of 2 parts:
1) IR receiver - for triggering user when there is a thief walked thru ( cut the IR signal from transmitter, it wil sound)
2) heat sensor - for triggering user when there is a fire
*********
output:
1) when the IR signal is blocked by hand, means when the IR receiver is not receiving IR signal from IR transmiter, LED bight up together wif buzzer sounded for 5 sec.
3) when heated the NTC, both buzzer & LED are ON: IR tat side's LED & buzzer ON for 5sec, heat's LED & buzzer ON as long as it is heated.
*********
the board is done, but can some one explain the schematic to me?
i have to presentation(explain how it works) to my lecturer this week for this mini project in my diploma
thanks in advanced !
the circuit consists of 2 parts:
1) IR receiver - for triggering user when there is a thief walked thru ( cut the IR signal from transmitter, it wil sound)
2) heat sensor - for triggering user when there is a fire
*********
output:
1) when the IR signal is blocked by hand, means when the IR receiver is not receiving IR signal from IR transmiter, LED bight up together wif buzzer sounded for 5 sec.
3) when heated the NTC, both buzzer & LED are ON: IR tat side's LED & buzzer ON for 5sec, heat's LED & buzzer ON as long as it is heated.
*********
the board is done, but can some one explain the schematic to me?
i have to presentation(explain how it works) to my lecturer this week for this mini project in my diploma
thanks in advanced !
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