hi i m doing my final year project and in that i m using pir sensor D203B. the problem i m facing is that when i attached the led at output it keeps on even if i remove the sensor. i have checked my sensor by taking its output on the oscilloscope that comes out right but when i patch the circuit on breadboard it does not work well.
other problem is that without motion the output sensor voltage is 0.4mV and on motion it changes to 0.6mV only kindly tell me that is these readings can come or not and if yes then how can i amplify such small voltage to drive my buzzer at output.
do reply me as soon as possible...
other problem is that without motion the output sensor voltage is 0.4mV and on motion it changes to 0.6mV only kindly tell me that is these readings can come or not and if yes then how can i amplify such small voltage to drive my buzzer at output.
do reply me as soon as possible...