[sdiy] The annual I/O impedance/protection thread! (bumped)

[Justin Owen]

----Original Message-----
From: Andre Majorel [aym-htnys at teaser.fr]

On 2011-07-12 20:34 +0100, Justin Owen wrote:

>> So - I'm talking about modulars. Specifically +/-12V power
>> supply, 10V PP AC waveforms, 0-5V CV and a level of protection
>> based on the fact that I will have no control over who will be
>> plugging what into where.

>Someone with a mixed modular could easily inject voltages up to
>+/-15 V into your +/-12 V modules.

>Worst case is +/-15 V module into your unpowered module. Then
>your circuit needs to be able to withstand 15 V above/below
>either rail.

So how would you rate these latest schems for handling that type of scenario - is there anything you would suggest adding/removing/changing?

http://www.sdiy.org/juz/euro_input_02.pdf
http://www.sdiy.org/juz/euro_output_02.pdf
http://www.sdiy.org/juz/euro_summing_02.pdf

Thanks

Justin