I have an optical switch (Optek OPB831W55Z) hooked up but I'm not getting the expected results. It's switching when the slot comes by, but only down to 6v from the 12v I'm running it on.
It's entirely possible I'm interpreting the datasheet wrong, but about all I know to watch out for is max current ratings. The rest of the sheet looks kinda greeky to an amateur like me.
The diode side has 50mA as absolute max so I selected 470ohm for a current limmiting resistor. The phototransistor is rated up to 30mA so I went with a 330ohm resistor there.
Maybe I selected the wrong aperture? The 55 in the P/N indicates .050 apertures and I'm running an .060 slot thru it. I'm looking at it in a stationary position at the moment tho. The slot should be lined up for full shine.
But only 6v.
It occured to me maybe the current limiting resistors are built in, altho there's nothing in the datasheet to suggest so .....
Who knows? But I would be very grateful if one of you wizards could point me to the error of my ways.
Thanx
SP
It's entirely possible I'm interpreting the datasheet wrong, but about all I know to watch out for is max current ratings. The rest of the sheet looks kinda greeky to an amateur like me.
The diode side has 50mA as absolute max so I selected 470ohm for a current limmiting resistor. The phototransistor is rated up to 30mA so I went with a 330ohm resistor there.
Maybe I selected the wrong aperture? The 55 in the P/N indicates .050 apertures and I'm running an .060 slot thru it. I'm looking at it in a stationary position at the moment tho. The slot should be lined up for full shine.
But only 6v.
It occured to me maybe the current limiting resistors are built in, altho there's nothing in the datasheet to suggest so .....
Who knows? But I would be very grateful if one of you wizards could point me to the error of my ways.
Thanx
SP