ahmedragia21
Member
Hi, i bought this photo transistor and connected it as showen in this schematic and it doesnt really work , i used an ultrabright led to shine light on a surface (black and white ) and measure the analog value , no voltage swings between white and black just few mV between both colors.
I tried 1k , 10k , 100k resistors and doesnt swing and 180K resistor it swings but with +- 2V between white and black ...
i dont know how to choose the value of this resistor ?
https://www.electro-tech-online.com/custompdfs/2007/12/PT204_6C.pdf
here's the datasheet
I tried 1k , 10k , 100k resistors and doesnt swing and 180K resistor it swings but with +- 2V between white and black ...
i dont know how to choose the value of this resistor ?
https://www.electro-tech-online.com/custompdfs/2007/12/PT204_6C.pdf
here's the datasheet
Attachments
Last edited: