Re: Switch Contacts at low voltages


PeteS wrote:
Noway2 wrote:
During a design review yesterday, a question was posed to me about
whether or not the customers will need to use gold contacts on the
switches that connect to our system. In response, I have been
searching for some guidelines as to when gold contacts are required. I
have found a lot of information discussing mechanical operation of
contacts, wetting current, oxide build up, etc, but have not found
anything providing some "rule of thumb" recommendations.


if it is a slow mechaical switch I would add 0.1uF across each switch.
This will give a small surge of current each time the switch is closed
that will keep it clean and also filter noise and bounce.
Mark

.

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