need help regarding CNY70 connection.

sarmad_101 · Nov 28, 2011

Hay everbody,

I am connecting C-Control Pro to cny70 but i am confused about the connection with cny70. There are 4 pins of cny70 and i checked the datasheet and i am still not sure that which one is emiting diode and which one is recieving diode.

Please Help me out...

thanks

Elimathew · Nov 28, 2011

Como usar el CNY70 - YouTube
this one is a good video regarding CNY 70
i learnt it from here

kak111 · Nov 28, 2011

Positions of CNY70 connection pins

sarmad_101 · Nov 28, 2011

View attachment signal.bmp

This is my circuit.

What resistance i should use for R2, R3 and R4.

I am using 10K for R3 and C1 is 33u. Confused about R3 and R4. Need Help.

kak111 · Nov 28, 2011

I would select
R2 = 0 ohms
R3 = 4.7....22kohm
depends on reflecting medium

look google picture search "cny70 schematic"

and test , what resistance R3 value gives highest sensor sensitivity
with used reflector

C1 & R4 is simple RC-filter

RC time constant calculations, look here....

RC time constant - Wikipedia, the free encyclopedia

Cutoff frequency - Wikipedia, the free encyclopedia

need help regarding CNY70 connection.

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need help regarding CNY70 connection.

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