Hi guys.
This is my first post on here and im really hoping somebody here can help. Im using labview to control a stepper motor and i want to create a variable speed pulse train in order to control the speed. I have the controller and the driver part sorted.
I bought this lm231 ic, which is a voltage to frequency converter in the hope that i could use a 5v analog out signal from my usb daq device to control the output pulse train from the lm231.
Alas i'm having problems with the wiring up of the application example which can be seen below. The VS here is 5v and the input voltage can go from 0 to 5v with the analog out from the daq. The components i'm using are not the exact values used in the example but i was hoping to get some kind of pulse out but so far the output from pin 3(Frequency Output) is just always high. I'm reading signals from pin 3 with a counter input on my usb daq but obviously since it is remaining high, there is no pulse or count. There is no counter output on the usb daq device. This is the reason I need to use this ic.
Could anyone have a quick look at the below pics and see if im doing something obviously wrong??. As i said im new to electronics like this. . Any help would be greatly appreciated. Thanks in advance guys.
This is my first post on here and im really hoping somebody here can help. Im using labview to control a stepper motor and i want to create a variable speed pulse train in order to control the speed. I have the controller and the driver part sorted.
I bought this lm231 ic, which is a voltage to frequency converter in the hope that i could use a 5v analog out signal from my usb daq device to control the output pulse train from the lm231.
Alas i'm having problems with the wiring up of the application example which can be seen below. The VS here is 5v and the input voltage can go from 0 to 5v with the analog out from the daq. The components i'm using are not the exact values used in the example but i was hoping to get some kind of pulse out but so far the output from pin 3(Frequency Output) is just always high. I'm reading signals from pin 3 with a counter input on my usb daq but obviously since it is remaining high, there is no pulse or count. There is no counter output on the usb daq device. This is the reason I need to use this ic.
Could anyone have a quick look at the below pics and see if im doing something obviously wrong??. As i said im new to electronics like this. . Any help would be greatly appreciated. Thanks in advance guys.
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