Amplifier advice for simple waveform <500Hz

[lidu8]

Hello,

(Moved this from the other forum as suggested in the comments)

I would like to generate simple wave forms below 500 Hz, to generate electric fields of one tesla via a coil.

I will use a USB DAQ for this.

What kind of amplifier should I use on its output? There's a few forum discussions on this but I can't seem to find one that could be programmed through an API as well.

Any help would be very welcome 🙂

[santo_13]

Almost all NI DAQ with an Analog Output can generate signals < 500Hz.

Except for USB-6000, all the other 3 DAQs can generate a 500Hz sinewave

https://www.ni.com/en-us/shop/data-acquisition/entry-level-usb-daq.html

[Henrik_Volkers]

As mentioned in the old thread, you need to specify more needed specs for an amplifier , such as

power range .. current and voltage  , the load (a coil 😉  ) 10 turns and an area of A  is different to 1000 turns of smaller wire 🙂

If you  need a good control of the magnetic field you migth want to use a voltage controlled current source  since the coil usually heats up and a constant voltage  amplitude don't help you in that case.

[lidu8]

thank you, I'm sold on the NI DAQ 🙂

[lidu8]

honestly, I don't know yet. I've been putting this on hold for a very long time partly because of this (no clear target settings), and the only was forward for me to learn anything about it is to have something to "play with" so I was looking for a general-purpose amplifier. I can then start using different coils with an EMF meter.

Apologies for the basic questions, but I'm not quite sure where to start...

Voltage controlled amplifier (i.e. controlling the amplitude of the signal by varying the voltage?) sounds like the way to go thanks.

So a NI DAQ, with any audio amplifier (until I find a voltage controlled one that hopefully has an API to control from a computer), one antenna for emitting, one for receiving (to act as a EMF meter).
Is this correct?