I've been wanting to build my own decade resistance box for a while now, and I'm trying to figure out how much it would actually cost (so far, it seems to be a lot more than I thought!)
These are the switches I've been looking at:
http://ca.mouser.com/Search/ProductDetail.aspx?R=A11015RNCQvirtualkey61110000virtualkey611-A11015RNCQHowever, those are relatively expensive -- over $5CDN each!
They're the most expensive part of the project so far -- $45 for 8 of them. My question is, are these switches A) the right kind (pretty sure they are) B) actually the best value (really not sure) and C) the best way to go about it.
What I'm wondering is, instead of using rotary switches, I suppose in theory I could use actual switches (although I guess I'd need 100). Are there any other good design ideas out there? Has anyone here built one that isn't just another standard decade resistance box? I'd kind of like to make it unique and different. Like, maybe have one switch to select between 1Ohm-1MOhm, and then 9 switches to pick the value for each one, or something like that. If that sounds stupid, let me know
I probably won't be actually building this for a long while, I'm just trying to price the parts and see if it's something worth doing down the line. I like to use unusual and different designs if and when possible.