[time-nuts] Slightly OT: inexpensive USB analog-digital converter?

Poul-Henning Kamp phk at phk.freebsd.dk
Fri Jan 18 17:25:37 EST 2008

In message <47912452.1060702 at xtra.co.nz>, Bruce Griffiths writes:

>Offset drift is significantly higher than for other sensors.

On the LTSR they've pinned out the reference, so you can calibrate
the offset out.  I've done it, it's trivial.

>LEM also make dc fluxgate current sensors with 1ppm linearity and 50ppm

And I belive, they also make money on those.

For my needs (a 12 bit ADC) calibration is just fine.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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