[hackspacebristol] Measuring low current

Tom Gardner tggzzz+hs at gmail.com
Thu Feb 22 08:56:09 UTC 2018


He's had some design problems
www.eevblog.com/forum/blog/eevblog-1057-current-murphy/

It is worth being aware of the 300kHz bandwidth, which probably translates
to a transition time of ~1us.

On 22 February 2018 at 08:31, Jolyon Jenkins <jolyonjenkins at googlemail.com>
wrote:

> Yes - I think they are out of production though
>
> On 22 February 2018 at 08:21, Rhys Clarke <rhysclarke2009 at gmail.com>
> wrote:
>
>> As a more long term solution look at this
>> https://www.eevblog.com/projects/ucurrent/
>>
>>
>> On 22 Feb 2018 08:09, "Richard Sewell" <richard at jarkman.co.uk> wrote:
>>
>>> Could you short across the meter with a clippy lead, either during this
>>> switchover or for the whole high-current phase ?
>>>
>>> On 21/02/2018 23:24, Jolyon Jenkins wrote:
>>>
>>>> If I then switch to the uA range, I'm not confident that the
>>>> (mechanical) switch isn't bouncing, or momentarily disconnecting,
>>>>
>>>
>>>
>>>
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>
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