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Need More Power to drive relay USB 6001 digital output Please help

Hello community

I have a USB 6001 Ni card in a program that will drive a Opto22 G4 relay to turn a motor on and off using a digital output

The problem I am having is the output of the 6001 about 3.3 volts ( high) dosent have enough current to Switch the relay 

if I connect the relay ( opto22 G4) up to a simple 5Vdc power source then the relay switches solid but with the USB6001 there is not quite enough power to do this .

 

Can anyone provide me with an inexpensive solution that will provide enough power to switch this relay ?

 

I think the opto22 G4 relay requires 12Ma to switch and the Ni usb6001 card will only provide 4 ma 

 

your thoughts  ?

thanks

 

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@Billshull wrote:

I think the opto22 G4 relay requires 12Ma to switch and the Ni usb6001 card will only provide 4 ma


Please watch your capitalization with units.  It makes a big difference, especially between Mega and milli.  So if the relays need 12mA, you could get away with a simple level shifter/digital buffer circuit.  I have used these with a lot of success: SN74LVCC4245APWR.


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Thanks I will give it a try

After all the chip is only 1.23 each

 

but I will have to wire it up and make a breadboard for it 

lol

 

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I received the SN74LVCC4245APWR Chips today only to find they are Super small no way I can use this since they are 1/2 thumb nail size ?

perhaps a pull up resistor will work  has anyone tried this  ?

if so  how would you make this work ?

 

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Hi Billshull,

 

You can't ask the device for more current than what it is capable of providing. As you said, the limit for the DO is 4 mA, so if you try to obtain more than that, it shouldn't give it, and it could even get damaged if it does. Maybe you could use a transistor connected to an external power supply as the current provider, and use the DO as the control signal for cutoff-saturation working? You would just need to calculate the collector and base resistors in order to get this working mode for the transistor.

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yes

This I think is my only option besides buying a Ni card that has enough power to do the job 

Looking into this now 

thanks for the help

I will let you know my solution soon

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