Hi all,
I need to create a board with a lot of switches. That switches will control some jumpers on a development kit for a microcontroller (there is no need to say something specific about this).
Consider that the development kit has some 2-pin headers that when connected (short circuited) with a jumper they configure the kit.
Typically they are all pulled up 3.3V lines that are grounded when short circuited.
I need to create a board that will control the development kit's pin headers so that I can create a set of different configurations for the jumpers.
This is required because I need to run nightly acceptance tests for the DK, during which the jumper configuration changes (from test to test)
But enough with this. A am mostly a software engineer, I know how to use a relay, the basic BJT configurations but I can't make a decision on this
since I need a lot of switches (let's say 40) that will be controlled by a microcontroller (and some extra digital circuitry accessories)
Any ideas on what to choose for this switch?
Should I use miniature smd relays (which is the easiest but very expensive and space consuming)?
Could I use optocouplers as a DC switch for low current? (<1mA) Anything else?
Can I use analog switches such as dg9431?
Thanks