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PIR SENSOR NOT WORKING

http://forum.cytron.io/viewtopic.php?f=9&t=11133

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PIR SENSOR NOT WORKING

PostPosted: Thu Sep 15, 2011 3:24 pm
by prembond
Recently i bought PIR sensor from cytron, when i connect the sensor to 8051 microcontroller, the sensor does not produce any logic output, i test the output using led and also programming.

Re: PIR SENSOR NOT WORKING

PostPosted: Fri Sep 16, 2011 6:29 pm
by ober
A picture of the setup might be helpful.

Re: PIR SENSOR NOT WORKING

PostPosted: Sat Sep 17, 2011 9:04 pm
by prembond
figure 1.JPG
picture taken at PIR sensor
figure 2.JPG
connection of positive and negative of sensor with jumper from microc board
figure 3.JPG
whole diagram of connection


the wire connected at output of PIR SENSOR is connected to one microc 8051 port

there is no output present. output is checked using correct program and also measured using multimeter but there is no logic or voltage.

Re: PIR SENSOR NOT WORKING

PostPosted: Mon Sep 19, 2011 11:15 am
by redips_id
Try to troubleshoot it first. Connect +5V and Gnd only, then check using multimeter/oscilloscope the output of the sensor.

Re: PIR SENSOR NOT WORKING

PostPosted: Mon Sep 19, 2011 9:40 pm
by prembond
my sensor is working now, it can produce output but, it produce logic 1 when there is no people,
how to solve this problem?

Re: PIR SENSOR NOT WORKING

PostPosted: Mon Sep 19, 2011 11:24 pm
by yonghui
hello ,

i see from the user manual that there are 2 modes of operations: retrigger and Normal. which mode u are operating the sensor?

regards,
inghui