Remote low voltage Switch with Propeller

Chicago Mike

So I'm looking to build this·little test device for a project at work to make my life easier. Basiclly this device will have a tail on it which will plug into a PCB location that is normally populated with a 16 Pin DIP swtich. (So 8 switches). My device, which will use a propeller for the logic and front end, needs to be able to automate the swtiching of these switches in a sequence routine I write in the prop (So combinations of on and off of the 8Switch bank). Normally I would just build switch outputs·right from the prop if I knew what each switch was doing (Like switch one is shorting to ground, and so on). However I don't know this. Its a mix and different per swtich -- and potentially per thing I plug into (So one swtich when closed may be logic hi, another may be logic low). The only guarantee I have is that no side of the switch exceeds 5V.. So my question is, how should i do the switching? I don't want to use relays if I can help it (Size, speed, and noise, and current consuption). Should i be looking into bus switches? Or Using logic level MOSFETS. (Though I can't see how MOSFETS would solve the problem of not knowing if I'm swtiching hi or low).

Any ideas on a switching concept?

Thanks!

Franklin

If you are replacing a dip switch you are just making a short or an open not providing power so a transistor, mosfet or digital switch would work (or relays ) all you need to do is send power to the switch points you want on and not to the ones you want off.

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- Stephen