Hmm, the only link i see in your initial post is the one within the code - https://www.adafruit.com/products/269
That module has a lot more (visible) parts than the one in your last picture.
Compare the two:
I found this, is that the same you have?
Either the pictures or the description appear to be wrong - there is no voltage regulator, no level shifting circuitry, only the chip and a bypass capacitor.