Three wire IR RPM sensor voltage - RC Groups
Shop our Airplanes Products Drone Products Sales
Thread Tools
Jan 18, 2018, 01:43 AM
Registered User
Help!

Three wire IR RPM sensor voltage


I am making an RPM OXS Arduino sensor for FRsky S port and want to use the Eagletree three wire IR RPM sensor. The problem is I don't know if the power normally supplied by their data logger is voltage and current limited or if the sensor has a resistor built in it. Can anyone tel me the configuation of the sensor and its voltage and current requirements?
Sign up now
to remove ads between posts
Jan 27, 2018, 03:07 AM
Registered User

Further investigation after no replies.


After getting no replies, I decided to cut off the shrink wrap around the IR sensor and investigate. For those who are interested, the sensor is actually a “OPB606A” that costs $1.16 from Digi-Key. As far as wiring goes there are no resistors or other components in there but it is wired backwards to normal convention which is why I could not get it to work with Openxsensor.
The red wire is connected to pins 2 and 4 which is the cathode of the IR LED and the emitter of the phototransistor. The black wire is connected to pin 3 the anode of the LED and the white wire is connected to pin 1 the phototransistor collector. So after destroying this one I can now make my own for a lot less.


Quick Reply
Message:

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Help! Can I wire Magnetic RPM sensors wit arduino uno? HobbyKingUser Robotics 1 Jan 11, 2018 09:32 PM
Discussion Brushless motor RPM sensor - supply voltage TC Champ Eagle Tree Systems 3 Jan 23, 2015 08:29 PM
Question Brushless RPM Sensor Voltage superpanda Eagle Tree Systems 8 May 31, 2011 12:35 PM
Discussion Optical RPM Sensor IR/UV Sensitive? GeorgeP Eagle Tree Systems 4 Jul 21, 2008 08:55 AM