omryofec:
hi,
we've tried using the I2C_Scanner suggested above and another one we found elsewhere but it can't seem to find the address of our Gyro(GY-5210, Nano ATmega328)anyone knows what might be the problem?
Hi! I can't see on the picture if the LED light on the gyroscope is lit up. My concern with your circuit is that you power up the gyroscope from Vin pin. Try to power it up from 5V pin instead. I don't have an Arduino now to check, but I suspect voltage might not be available on Vin pin when you power the Arduino from USB.
UPDATE: I think you need to use pins A4 and A5 instead of D4 and D5