[Amps] Led display problem

[Steve Thompson]

On Tuesday 19 April 2005 08:51, G3rzp at aol.com wrote:
> In a message dated 18/04/2005 22:31:16 GMT Standard Time, pegloff at gmail.com
> writes:
>
> But a  bit more difficult to measure the other currents and voltages for
> which  the reference et the cathode level.
>
> Has anyone an idea how to do that,  on a simple way ?
Opto isolators? Some have a reasonable linear range, or you can use a second 
one and an opamp to correct any non-linearities. With any of the suggested 
solutions, you'll need to take care to protect the monitoring circuit under 
fault conditions.

Steve