> Any circuit suggestions for a multimeter plug-in that could measure
> 1nA (hopeful) to a few uA ? I was thinking perhaps A -> V and
> use the low DC volts range
>
> I've got a couple of multimeters - one goes down to 20uA and the
> other to 2000uA. Measuring a sleeping 12F675 gets you 00.0uA
> or 0.000mA (yes, it is alive, I can wake it up to do stuff). Helpful
> in the sense that it shows the battery will last a flipping long time,
> but there's nothing there to hang your hat on
>
> Googled and Googling around a bit but not too fruitful yet. Maybe
> I'm not searching for the right thing, and there's such a bewildering
> array of parts and technologies I might not even recognise what I
> need when I see it anyway
>
> The old NatSemi Linear Apps book has a 200pA-100uA circuit
> (LB37) for the LM216A and a 100uA  moving coil meter, but the
> LM216A seems to have dropped off the radar. I'm certain there
> will be an equivalent or better around, but short of downloading
> squillions of op amp datasheets...........
>
> TIA
>
> ===============================================
> If you aren't part of the solution, you're part of the precipitate
>
>
>
> _______________________________________________
> http://www.piclist.com
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist

>Any circuit suggestions for a multimeter plug-in that could measure
>1nA (hopeful) to a few uA ? I was thinking perhaps A -> V and
>use the low DC volts range
>
>I've got a couple of multimeters - one goes down to 20uA and the
>other to 2000uA. Measuring a sleeping 12F675 gets you 00.0uA
>or 0.000mA (yes, it is alive, I can wake it up to do stuff). Helpful
>in the sense that it shows the battery will last a flipping long time,
>but there's nothing there to hang your hat on
>
>Googled and Googling around a bit but not too fruitful yet. Maybe
>I'm not searching for the right thing, and there's such a bewildering
>array of parts and technologies I might not even recognise what I
>need when I see it anyway
>
>The old NatSemi Linear Apps book has a 200pA-100uA circuit
>(LB37) for the LM216A and a 100uA  moving coil meter, but the
>LM216A seems to have dropped off the radar. I'm certain there
>will be an equivalent or better around, but short of downloading
>squillions of op amp datasheets...........
>
>TIA

>Any circuit suggestions for a multimeter plug-in that could measure
>1nA (hopeful) to a few uA ? I was thinking perhaps A -> V and
>use the low DC volts range
>
>I've got a couple of multimeters - one goes down to 20uA and the
>other to 2000uA. Measuring a sleeping 12F675 gets you 00.0uA
>or 0.000mA (yes, it is alive, I can wake it up to do stuff). Helpful
>in the sense that it shows the battery will last a flipping long time,
>but there's nothing there to hang your hat on
>
>Googled and Googling around a bit but not too fruitful yet. Maybe
>I'm not searching for the right thing, and there's such a bewildering
>array of parts and technologies I might not even recognise what I
>need when I see it anyway
>
>The old NatSemi Linear Apps book has a 200pA-100uA circuit
>(LB37) for the LM216A and a 100uA  moving coil meter, but the
>LM216A seems to have dropped off the radar. I'm certain there
>will be an equivalent or better around, but short of downloading
>squillions of op amp datasheets...........

>Any circuit suggestions for a multimeter plug-in that could measure
>1nA (hopeful) to a few uA ? I was thinking perhaps A -> V and
>use the low DC volts range
>
>I've got a couple of multimeters - one goes down to 20uA and the
>other to 2000uA. Measuring a sleeping 12F675 gets you 00.0uA
>or 0.000mA (yes, it is alive, I can wake it up to do stuff). Helpful
>in the sense that it shows the battery will last a flipping long time,
>but there's nothing there to hang your hat on
>
>Googled and Googling around a bit but not too fruitful yet. Maybe
>I'm not searching for the right thing, and there's such a bewildering
>array of parts and technologies I might not even recognise what I
>need when I see it anyway
>
>The old NatSemi Linear Apps book has a 200pA-100uA circuit
>(LB37) for the LM216A and a 100uA  moving coil meter, but the
>LM216A seems to have dropped off the radar. I'm certain there
>will be an equivalent or better around, but short of downloading
>squillions of op amp datasheets...........
>
>TIA
>
>===============================================
>If you aren't part of the solution, you're part of the precipitate
>
>
>
>_______________________________________________
>http://www.piclist.com
>View/change your membership options at
>http://mailman.mit.edu/mailman/listinfo/piclist
>
>  
>