Hi, I designed a simple PID loop to control the input voltage of a device. My device has a resistance of Ohm. I found that the input voltage being controlled can't exceed 0.6V, then I realized that the maximum output current is 2mA of my DAQ NI 6211. But I really need current more than 2mA(Max is 10mA). I tried using voltage follower since it has large imput impedance and small output impedance, but it doesn't work. Could somebody tell me one method to to solve the problem? Thanks. CJL

caps 100nF || with 10µF , R optional.. what OP are you actually using? Without that GND connection no current can flow 😄 so you will stick at 0.6V like without driver.

Multifunction DAQ

How to output analog current more than 2mA

Solved!

The purpose is to transmit sound wirelessly to a tiny vibrator 2 cm away and since isolation (6218 has) is very important so the best is to not use any external module.

Thanks Henrik, I will open a thread about this issue today!

Best regards,

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Multifunction DAQ

How to output analog current more than 2mA

Re: How to output analog current more than 2mA