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I'm using a NI-USB 6215 card to power the circuit in the picture (although the same issue occurs with the 6008 card). I'm trying to set the analogue out value to 5 V and more however the Voltage readout won't exceed ca. 3.2 V. The card is fine when not being used to generate a voltage for the current readings. The manual states that this card should be able to handle 50mA and I'm only drawing 6mA. I gather I can use an external 5 V supply which may help but was surprised that this problem was occurring.
The +5Vdc terminal on the device will output 50mA but the analog output channels will only drive 2mA. These devices are not meant to power circuits.
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