Hello! So I am making a model rocket flight computer with an Arduino Nano, MPU6050, and 2 Sg90 servos. What I need to know is how I can power these using a battery. The problem is I can't have AA batteries because they are way too heavy for a rocket, so I decided to use LiPo batteries because they are lightweight (unless there are any other options?). So how can I power the Nano, MPU6050, and the 2 servos using LiPo Batteries. I can use as many as needed.
How long does it need to be powered for ?
Maximum a minute. But most likely 45 seconds.
What voltages and what currents will there be in the build?
SG90 servos need 4.8-6.0V.
LiPo provide 3.7V, so one is not enough and 2 in series, to provide 7.2V, is too much.
I think you're going to need a boost converter (for 1xLiPo) or a buck converter (for 2xLiPo) to get you to ~5V.
You need to budget the current so you can choose a suitable buck or boost converter. SG90 servos can draw up to ~250mA when moving, but when stalled that can be up to ~650mA or more. Are the servos likely to get stalled? On top of that, you might want to allow maybe 50mA for the Nano and sensor, although it's probably less.
What type of Nano is this? A "classic" Nano 3 or one of the many newer types that are also called "Nano" these days (just to confuse everyone)?
What else will be in the circuit? Something for parachute deployment? Data logging?
Until there is a delay in launching that extends the required time period
Data logging will be in the circuit. Deployment will be powered on another circuit, I have that handled. I have the Nano from the Arduino Store. Could you provide links to a boost converter and a good lipo battery? And also, 7.4V is too much power?
How will that be achieved, and how much extra current have you budgeted for that?
Do you mean parachute deployment?
How is this other circuit powered?
Save that for prototyping and testing on the bench. For the launch, use one of the cheap Nano clones, they are pretty reliable.
I'm not offering to do your homework! See what you can find and post links here. We will check them for suitability.
"V" stands for Volts. That's a unit of electrical potential, not power. If you want to be successful in building this project, you need to understand such concepts better!
I have found a website that teaches me about how to use a data logger with wxternal power. The deployment system is made by a company that comes with a battery and mount. Also, how come i should use a know off? Wouldnt it be safer to use the real thing, id imagine it would be more reliable, Or is that difference negligible?
Can't help much further if you insist on keeping secrets.
What else would you want me to gife you?
In your first post, you were so concerned about weight that you said AA batteries were "way too heavy" so you need to use LiPo. Now you have admitted that there will be a data logger with its own power source and a "deployment system" which might be deploying a parachute (but you refuse to confirm that) that also has its own power source. That's at least 3 batteries now? Are you sure that the difference between AA and LiPo is so important to you? Because I'm not seeing numbers to back up this theory...
So there is this company eggtimer rocketry that had a deployment module and it comes with a lipo battery rhat alk you have to do is commect it. The data logger will be connected to the arduino, i appolpgize for me not bringing it up. I just thibk that lipo will work best because of weight, do you think otherwise?
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Your other topic on the same subject deleted.
Please do not duplicate your questions as doing so wastes the time and effort of the volunteers trying to help you as they are then answering the same thing in different places.
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