How do I change the LSB of the I2C address of the Sparkfun's MPU-6050 breakout board? From the schematics on the Sparkfun's web page ( https://www.sparkfun.com/products/11028 ) this pin (A0) is soldered to the ground, so the address is xxxx0, but there is a "solder jump" between the chip's A0 and this soldering. I would like to change the adress from xxxx0 to xxxx1 (connect A0 to VDD). I am supposed to connect this "solder jump" to VCC directly, or am I supposed to unsolder A0-GND first to prevent short-circuits to happen? I don't usually do electronics, so I don't want to blow up everything by trying to guess.
You should disconnect it from GND and connect it to Vcc. Look at the second photo on sparkfun, as you can see there's that nice solder blob on the right side of AD0: you need to get rid of it, then you'll reveal three little pads: the center is connected to the chip, on the right you have ground while on the left you have Vcc. Now you only have to solder center with left and you are good to go. Just be careful not to short ground and Vcc: your power source might not be protected from short circuits and you risk to either destroy the PSU or burn the solder blob (very, very unlikely).
It just requires a bit of dexterity, really.