Instrument with analog output, cheap and on RS232/USB

Anything here:

test.

prohibitive expensive)

Bandwidth? Memory depth? Resolution? Sync trigger?

This

Have you looked at Measurement Computing? They are inexpensive, less than NI.

Cheers

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prohibitive expensive)

I assume a standard USB stereo audio adapter for the PC won't work?

Rick

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prohibitive expensive)

You can use a cheap PLC like this:

or a programmable power supply like this:

Yes, just what I needed. Thanks :-)

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prohibitive expensive)

The supply is really nice, and I need one of those anyway. Wonder how the reliability is (MTBF), chinese build you know

Regards

Klaus

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prohibitive expensive)

reliability is (MTBF), chinese build you know

Be careful about the power supply - I did some hunting and found the user manual - useless - not a word about programming. I've had reasonable results from GW Instek PSP603, 60V 3.5A, documented control via Rs232 (although it needs a 12V supply poked in on one of the

MK

I bought this 30V/5A one for USD $99 (£61) including shipping with (isolated) USB and RS-232 interfaces. Seems to be unavailable from that source atm. I think it's okay Chinese quality, but probably rated a bit "optimistically" according to DJ's vblog. No NA safety approvals. It's a kind of spare for when the 3-output Rigol is being used or maybe for risky types of loads.

Speaking of Rigol, if you want more like a signal, these units are a bargain, in a different class quality and design-wise. They have an Ethernet interface (inherently isolated), and two signal generators, so you can generate a 50MHz sine wave frequency modulated with a 1MHz triangle wave if that's what you want.

They have higher frequency units, but the price goes up quickly for the additional capability.

Best regards, Spehro Pefhany

That's not bad. I was talking to a physics prof. (UC Davis?) who had an experiment where he put together different lengths of 50 and 75 ohm cable, making variable wavelength 'sturctures'. And drove it with a ~50MHz. generator.

George H.

"The Journey is the reward"

eff.com

This is the one I use for that purpose:

That way you have it in a sturdy plastic housing. Comes with the lite version of DAQFActory which is quite useful. I really like it. Well, except for that blood-red color.

This device is also handy for niftier test setups. For example "I want this line to switch to 3V tomorrow at 10:16am but only if there is enough daylight, and then gradually ramp down to 0V until evening".

Thats a nice device and in the right pricerange, thanks :-)

Regards

Klaus