06-25-2013 09:40 AM
I am new to labview and to cdaq devices. I have set up my c-DAQ 9174 and i have an NI 9477 digital ouput module that i am trying to use to send a voltage signal. i have purchased a cable and connected an NI terminal board to the module. I have wired in an LED to the board and i am looking to send a voltage to it. I have tried a few things with the test panels and a few other things but i cannot get the light to work. Anything would help.. Like i said. Brand new to all of this.
06-25-2013 01:14 PM
What pin are you connecting the LED to, and what polarity? Note that the 9477 has sinking type output channels, not sourcing. This means that the digital output pin is driven to COM when the channel is turned on. What kind of external power supply are you using, and how are you wiring it? Does the LED have an integrated resistor, or are you using an external resistor? Without either an integrated or external resistor, you might fry it.
06-26-2013 09:15 AM
We have a resistor in circuit with the led. With the sinking output channels do we need to ground to the COM on our terminal board? this equipment was what we were handed, so if there is something that would work better, feel free to chime in. we are using 9 volt battery as an external power supply. I have attached a picture of the equipment that we have.
06-26-2013 11:12 AM
I have the LED on now. What i am trying to do now is make it blink. I tried using a blinking property node, but that didn't work. I have read multiple ways to make an LED blink on labview, just wondering if there is a simpler way using the 9174 cdaq
06-26-2013 11:18 AM
06-27-2013 07:38 AM
This is what i have so far. Send a signal out to my LED and making it light up. I need assistance designing the VI that will allow me to control when i want the LED to blinking. So that i can turn the blinking on and off without completely turning off the led.