A neat solution that will get your Raspberry Pi Zero running with the mini Texas Instruments LP2000 project (and with a bit of fudging you can connect your regular sized Pi too). Great service and very reasonably priced for both the circuit board and shipping.
The board is of good quality and the write up on Mick's site is very detailed. Just one note, remember to install i2c-tools to get everything to work. Additionally the jumper for the power is the pin furthest away from the board edge.