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Help me to complete schematic diagram for ir sensor

http://forum.cytron.io/viewtopic.php?f=9&t=11876

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Help me to complete schematic diagram for ir sensor

PostPosted: Fri Nov 16, 2012 1:40 am
by jian999
I wan to connect this sensor to my arduino board, but i found that there is no output in this circuit diagram (which means cannot connect to analog pin for analog reading).Where should the output put in for analog reading???Thx for helping....
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Re: Help me to complete schematic diagram for ir sensor

PostPosted: Fri Nov 16, 2012 9:53 am
by zhenning


If you want analog signal from the circuit, tap from sensor 1 and sensor 2. LM324 acts as comparator between VR1 and Sensor 1 and output to out1, Sensor 2 and VR 2 and output to out2.

Re: Help me to complete schematic diagram for ir sensor

PostPosted: Sun Nov 18, 2012 12:33 am
by jian999
dun understand.....can u explain more clearly?

Re: Help me to complete schematic diagram for ir sensor

PostPosted: Sun Nov 18, 2012 12:43 am
by zhenning
jian999 WROTE:dun understand.....can u explain more clearly?


LM324 acts as a comparator comparing sensor 1 with vr1. It will only give you either '1' or '0' that is the output from OUT1. It will never give you analog signal. If you need analog signal, tap from sensor1 point.

Re: Help me to complete schematic diagram for ir sensor

PostPosted: Mon Nov 19, 2012 2:40 pm
by gadgetng
SENSOR1 and SENSOR2 are the analog input. In that case, the LM324 and preset no longer needed.

Re: Help me to complete schematic diagram for ir sensor

PostPosted: Mon Nov 19, 2012 6:12 pm
by robosang
jian999 WROTE:dun understand.....can u explain more clearly?


Curious to know, what is your background?