I am adapting the digital electronics lab assignments I teach so they can be done at home with inexpensive supplies rather than with the equipment in the hardware lab. I have breadboards, TTL chips, and LEDs and will want students to build full-adders out of AND, OR, and NOT gates, so I don't need much current. I am looking at MB102 power supply modules, most of which have USB inputs. I understand that I won't get 5V out with 5V input through the USB port. Will I get a high enough voltage to use TTL chips without flakiness? I am trying to avoid the expense of buying and shipping wall warts (but can do so if necessary).
To answer some questions, soldering is not an option. The unit is only on digital electronics, not analog. I'd like something quick and easy for students that just works, especially because it will be hard to debug circuits remotely.