Hello! As a part of a project im looking to creating an Altimeter using an MPU6050, a MicroSD reader, A 7.4v 2s LiPO battery and an arduino nano. problem being, both the MPU and microsd would require the GND pins, along with the LiPO battery. There are only 2 ground pins in an arduino board. I could buy an extension board but I really need to save space. What solutions would you have for this?
Use screw blocks or solder together all GND to one point.
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How would a screw block help? And when you say to solder 2 points together, does that mean solder 2 ground wires together so they enter through the same ground pin?
Google "splicing wires", you will see a million different ways.
A air pressure sensor would be a much better choice to measure altitude, as the MPU6050 is not designed for that.
One many Arduino boards there are ICSP connectors to program the main processor and the USB to serial converter. Each of those 6 pin headers has a ground pin.
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Im sorry, i meant Accelerometer
That seems interesting, Ill try that!
Hi, @aarmin
Welcome to the forum.
How accurate and to what altitude do you want to measure?
What is the object you will be flying, throwing, dropping?
Is there a reason your not using a pressure sensor?
Thanks.. Tom.. 
Its a model rocket, and Id want an accelerometer over an altimeter for data collection purposes.. Thanks!
Have you Googled;
model rocket data logger
A couple of examples using your hardware.
Tom..
So, have you figured out how to splice wires yet?
Working on it, don’t think it’d be necessary now that i can use the icsp pin, but a good skill nonetheless
Yeah, I think it’s sorted now though! Thanks!
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