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CT433-HSWF70MR TMR Current Sensor Compact Carrier -70A to +70A, 3.3V |
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Pololu Digital Distance Sensor, 25cm, Side-Entry Connector |
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JST SH-Style Cable, 2-Pin, Single-Ended Female, 12cm |
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5V, 100mA Step-Down Voltage Regulator D45V1E2F5 |
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Pololu Reverse Voltage Protector, 4-60V, 20A |
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24V, 4A Step-Down Voltage Regulator D42V55F24 |
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Pololu Reverse Voltage Protector, 4-60V, 25A |
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Pololu Isolated USB-to-I²C Adapter with Isolated Power |
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0.100″ (2.54 mm) Breakaway Male Header: 1×4-Pin, Right Angle, Black, 50-Pack |
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CT433-HSWF30DR TMR Current Sensor Compact Carrier 0A to 30A, 3.3V |
Understanding battery capacity: Ah is not A
- 18 January 2016Thank you for the quick and thoughtful response! I am also unsure as to how finicky these fans are; supposedly they are standard 5V small computer fans but probably super cheaply made and I don't want to risk overheating or ruining the batteries.
I hadn't thought of having two parallel systems... It sounds like a good idea if parallel batteries is a bad idea. I think I will go with that plan instead. Thanks again!
Understanding battery capacity: Ah is not A
- 16 January 2016Hello Jan, thank you for the informative article.
I thought initially that I knew what I was doing, but your comment about "not using parallel unless you know what you're doing" threw me off a bit.
What I want to do is run a group of six 5v fans, each drawing 120mA, from a battery pack (so the total draw should be 120x6=720mA). The run time needs to be 3-5 hours.
My original plan was to use two packs of 4 NiMH AA batteries (2500mAh each), in parallel. 8 batteries total.
By my calculations, that would provide a total of 4.8v and 5000mAh to the fans. So the run time would be 5000/720 = 6.9 hours at absolute maximum.
Do I have it correct? Many thanks!