BOB-0911B Opto-isolator (can HV be 12v 50mA )

Other Miscellaneous
1

Hi,

Can I connect this BOB-0911B Opto-isolator HV (high Side) side to 12v @ 100mA (max)?.

My photo sensor outputs signal at 12v 100mA (PNP) which I want to connect to a micro controller at 3.3 volts @ max 20mA.

Can I use this module safely with my photo sensor?.

Thanks for your valuable time.

2

It looks like it should be fine to me; looks like it can handle up to 70v or so on the high side, 3-5v on the low

https://www.sparkfun.com/datasheets/Bre … or-v12.pdf

https://www.sparkfun.com/datasheets/Com … ld205t.pdf

3

Thanks Russel. I will try and post the result here.

4

Is this Ok?

https://drive.google.com/file/d/1JMI__E … sp=sharing

5

opto-isolator-to-sensor.png
opto-isolator-to-sensor.png875×575 194 KB

Its BOB-09118 Opto-Isolator and Not BOB-0911B, please ignore the Typo Error.

Is this the correct way to connect?

6

You have that wired in the wrong direction. According to the schematic (https://www.sparkfun.com/datasheets/Bre … or-v12.pdf), the sensor would be connected to the input side. Ground to the input ground, and the PNP output of the sensor to either IN1 or IN2 through a suitable resistor, taking into account the 220 ohm resistor already on the board ((12-1.5)/0.01)-220 = 830, 820 ohms is the closest standard value.

On the processor side, HV would be the processor’s 3.3v, HV_GND would be the processor’s ground, and OUT1 or OUT2 (corresponding to whichever input you used) to the input pin on the processor.

/mike