In theory it is safe. As it is only 10V there is no problem from the desk
side of things. The only possible problem could come in how you connect it to to the dimmers. If you have all the connection information for your dimmers and there are external connectors then it shouldn't be a problem. Some dimmers actually had the wires go directly inside the dimmers before they are terminated. If your dimmers are this type then you will need a qualified person to help you. This is because the inside of the dimmer
will contain exposed wiring at mains voltage
. And you don't want to expose yourself / others to risk.
If the dimmers are quite old and haven't been used for a while then they should be checked for working / safety
before you start using them anyway.
Heres a link that shows how to build
a basic 10V lighting board
All being well with your dimmers this is quite a simple but worthwhile project.
You also may find existing control boards lying around in someones junk pile as well.