![]() ![]() The goal is to maintain a maximum brightness, but be able to fade the lights of my software. ![]() I have an NI USB-6501 data acquisition, but have never worked with her before and so would like some tips. The specifications for all this material is listed below. I'm looking to move from manual control to digital I/o. I have a bunch of LEDs connected to a power supply with an intermediate dimmer. ![]() If I do the same measure with the + 5V output (PIN 31) source instead of the output port (pin 28), the current is as expected 0.5mA and 4.8V power can be measured.įor all measurements, I used a NI USB-6501 which has already been tested by an engineer from the Canadian standard. I don't understand why the output current is not 0.5mA which would lead to 5V. High-voltage output was generated with labview. In a second step, I put out high voltage with the able Control Panel & automation of DAQmx which led to the same result.įor my measure I'd wait a current higher return especially for active training mode, since the specification indicates a voltage between 2.8 and 3.6V for 2mA. I use NI-DAQmx and changed the disc type of output with a property node in labview 8.5.1. I repeated the same measure with open-drain configuration, which leads to 3.27V and 0.33mA. For the active reader to type out in car, I measured a 3.33V voltage and current of 0.33mA. Too low current performance with USB-6501įor my measure I connected to an output port (output high voltage, 28 pins) with resistor of 10kOhm to ground (Pin 32). ![]()
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