2y0a21 distance sensor

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2y0a21 distance sensor

Postby gua_aku » Wed Mar 24, 2010 5:14 pm

i already test my sensor and intergrade with programming...and also already measure the output voltage,the output almost same acroding to the datasheet for below then 80cm...the problem is when the in front object with distance over then 80cm the output signal up to 1.2V.almost same with distance 20cm. what actually happen?it is my sensor was damaged?

somebody help me..
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Re: 2y0a21 distance sensor

Postby joliza » Thu Mar 25, 2010 11:38 am

Refer to analog distance datasheet http://www.cytron.com.my/datasheet/sens ... 0A21YK.pdf, the output voltage will decrease when the distance is increase. But it is valid only for distance range from 20cm - 80cm.
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Re: 2y0a21 distance sensor

Postby gua_aku » Thu Mar 25, 2010 1:37 pm

emm....tq you are right..i already refer on the datasheet but my problem is why my ouput voltage for distance over than 80cm is about 1.5V.?whether the sensor is broken?
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Re: 2y0a21 distance sensor

Postby sich » Fri Mar 26, 2010 1:01 pm

What's the analog reading for distance between 20 to 80cm? Can you check it out and let us know?
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Re: 2y0a21 distance sensor

Postby gua_aku » Fri Mar 26, 2010 5:32 pm

Distance
(cm) Output Voltage (V)
10 2.47
20 1.84
30 0.94
40 0.73
50 0.61
60 0.53
70 0.5
80 0.4
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Re: 2y0a21 distance sensor

Postby ober » Fri Mar 26, 2010 7:27 pm

seem that the sensor working fine. Anyway the data sheet of state that detection range is from 10 to 80, even the graph also show the voltage until 80 cm only, thus I would say that out of the range it can be any voltage.
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