I'm working on a ground drone. Weight isn't THAT much of an issue, I can probably make due with a large power wall or something.
The batteries that run the motors will be on a different circuit, I'm not worried about those. I just want my pi to be safe, and powered long enough for some good trial and error experimenting.
But I'm curious, if I wanted to make sure my pi had - 5+ish hours of play, maybe 10+ (or more), what would be the most cost effective way of doing so?
I currently have 6 UltraFire 3.7v batteries, HT14500, 1200maH. Are these a good option for this? I thought about getting a few more, and getting a an 8 AA holder for it.
I got this voltage down stepper from DROK:
But, I have a feeling that 8 3.7V batteries might be too much for the down stepper.
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DROK LM2596 Analog Control Buck Converter DC-DC 4-32V to 1.25-30V Step-down Regulator Module 24V 12V to 5V 3A Power Inverter Volt Stabilizer with Red LED Display.
I found this on Adafruit: https://www.adafruit.com/product/1566
However, I was looking to spend even less if possible I have some laptop batteries but the batteries are worn, and I'd need to buy more Lipos to get them usable again. This isn't my final project, this is just to see if I can get a node.js bot/ground drone going. If so, I'll move onto an arm or so, video, automation, etc.
Any other recommendations? Anything new on the market?