I am trying to build an RPM meter for my CNC machine. I have chosen the QRE1113 sensor to hopefully detect a line painted on my spindle.
Sparkfun has the break out boards but I have the senors so I am attempting to build one based on their design.
They have two configurations. Analog and digital. I can get the analog configuration working but not the "digital" configuration.
In the analog configuration, I am reading OV on out. If I put a 10k resistor in parallel with C1 (basically making it the analog configuration) the device works fine. Any idea what I could be doing wrong in the digital version?
I am wondering if I want analog configuration anyway since I will want a fast response from the sensor.
Edit: My supply is 5VDC. I went with a 180 ohm resistor for the current limiting resistor for the diode..
Sparkfun has the break out boards but I have the senors so I am attempting to build one based on their design.
They have two configurations. Analog and digital. I can get the analog configuration working but not the "digital" configuration.
In the analog configuration, I am reading OV on out. If I put a 10k resistor in parallel with C1 (basically making it the analog configuration) the device works fine. Any idea what I could be doing wrong in the digital version?
I am wondering if I want analog configuration anyway since I will want a fast response from the sensor.
Edit: My supply is 5VDC. I went with a 180 ohm resistor for the current limiting resistor for the diode..
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