--A quick note from another friend
Re-purposing old PC power supplies has long been an inexpensive solution to our low-voltage power requirements. Lots of people must be doing this for various needs and so the market has responded with a way to make it easier,.
To simplify re-using old PC power supplies for your projects, there are now adapters that plug into the power supply’s connectors and break-out the various voltages available. Here are some examples:
Ntice that one of these even has fuses on the output! These seem to run $10-$20 on eBay and Amazon. Search for “PC Power Supply Connectors” to find them. I love it when a plan can be skipped because someone has already done the planning for me! –Don Merz