command a ventilator with USB6251 and The Daq Signal Accessory

[raul200020]

Hello,

I would like to make a school project using Labview and the USB6251 connected  to the Daq Signal Accessory Board.

The Labview program must read continuously the temperature from the temperature sensor (AI channel 4, internally connected) from the Daq Signal Accessory Board. When the temperature reaches an established value, then a led on the front pannel must be turned on and an output singal from the Daq must start a ventilator connected to the Daq which cools down the sensor and then stops.

Would it be possible to do something like this? Even if I generate a square signal and the ventilator runs only on the high state of the signal. The ventilator requires at least 120 mV DC current. I am afraid that if I take such current from the Daq I might damage the device.

Thank you.

[Coq_Rouge · Accepted solution]

I guess you mean 120 mA DC current ;). If you look at your daq board spec you will find that the max current are far bellow 120 mA. This is true for both analog out and digital out. Take a look at this site it may help out some. http://www.me.umn.edu/courses/me2011/robot/technotes/motorcontrol/motorcontrol.html cool site. If you want speed control you have two options PWM or regulating the motor voltage.

Good luck

[raul200020]

Thank you for your answer and sorry for my mistake (mV instead of mA). I will read what you have sent me and hope to finalize the project.

Have a nice day.