Author Topic: Looking for some decent input protection schematic  (Read 1106 times)

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Offline 001Topic starter

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Looking for some decent input protection schematic
« on: April 13, 2018, 08:02:43 am »
Hi!

I`m gonna make diy voltmeter&milliommeter just for fun
And I`m  looking now for some decent input protection schematic
Any ideas?


 also it may be interesting for peoples who wants to upgrade cheap DDMs
 

Offline WhichEnt2

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Re: Looking for some decent input protection schematic
« Reply #1 on: April 13, 2018, 10:43:50 am »
You can check Fluke's 83_85_87smeng0500.pdf doc (83, 85, 87 service manual) which contains a lot of schematics, ever with signal flows for every mode. It also have a short description about protection circuits in "theory of operation" section.
Short pieces, high value, small period, huge amount, long delay.
 
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