Does anyone know if the A2 terminator can be used with the newer Model B+ raspberry pi? My model A PI has stopped working but I have a PI B+ sitting around. However the older PI's have 26 GPIO pins and the newer ones have a lot more....

I'm looking to start a project where I want to go to local high schools and spread the knowledge on cryptocurrencies. More specifically I want to show them practically how mining works as a starting point. I think it is more beneficial to "do" in conjunction with listening to a whole bunch of theory.

I want to source old and hopefully inexpensive scrypt miners and supply them to schools (either free or very cheaply) so that each student can have their own little miner and learn about bitcoins/litecoins, software and hardware. My son was part of the hour of code and this is where I got the idea from.

The reason for scrypt/litecoin is that I think it will be more interesting for kids because the bitcoin hashrate is insane. At least with litecoins, they could maybe earn a few cents a day to keep their interest. (Although old btc miners would be fine as well).

Does anyone have (or know of anyone that has) old scrypt miners lying around that need a new home? Or are there websites that offer cheap old (1st gen?) miners?

Or is it the case that anyone with a miner, no matter how new or old, would have it running 24x7 themselves?

Any thoughts would be appreciated.