Timeline for Power demand calculation
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
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| Jan 10, 2014 at 10:58 | vote | accept | Adel Bibi | ||
| Jan 10, 2014 at 10:58 | comment | added | Adel Bibi | @alexan_e That's perfect. Therefore; I will only connect the off-coard 5 v regulator connected to the (+5v) pin in arduino when I'm sure all the other modules opperate on 5v. Otherwise; I will have to connect a power supply that is higher around 7-12v through the power jack. Thanks alot! | |
| Jan 10, 2014 at 10:54 | comment | added | alexan_e | @AdelBibi So you mean if you feed 5v to the 5V input of arduino (output of the onboard regulators) and there is a shield that expects to find a voltage source >7v in the Vin pin (input side of the 5v regulator)? I guess in that case you have to feed the board with that higher voltage or use an external supply to the shield directly (if possible). | |
| Jan 10, 2014 at 10:39 | comment | added | Adel Bibi | Sorry I missed typing that. I meant, what if the modules operate to a higher volrage that +5v. When I connect the off-board regulator to the (+5v) pin, that will only provide me with a 5v source. What if one of the modules operate at 7v? @alexan_e | |
| Jan 10, 2014 at 10:24 | comment | added | alexan_e |
@AdelBibi what if the are to operate higher than (+5v)? Please rephrase the question. If you mean what are the alternatives to generate 5v you can use a switching regulator like this (uses a LM2596) that has a high efficiency.
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| Jan 10, 2014 at 9:48 | comment | added | Adel Bibi | At the end this won't solve the problem of high pwoer dissepation, but will only make sure the mega is safe. Did I get that correctly? One last thing, what if the are to operate higher than (+5v)? | |
| Jan 10, 2014 at 9:46 | comment | added | Adel Bibi | As for current, I'm using an arduino mega. I couldn't find any thing relating the (overcurrent) except for the usb connection. Where they say the following: "The Arduino Mega has a resettable polyfuse that protects your computer's USB ports from shorts and overcurrent. " is this the same max overcurrent the power jack or (vin) can handle? Let me get this staright, when you say to use an off-board regulated 5v supply, do you mean I use a (for exapmle) 7.4v power supply connect it to a (High current) regulator and the out put connected to (+5). Sorry I'm new to this! | |
| Jan 10, 2014 at 9:40 | comment | added | Ignacio Vazquez-Abrams | It's definitely advisable. Shoving 7.4V into a 5V linear regulator means you waste about 1/3 of your battery. | |
| Jan 10, 2014 at 9:36 | history | answered | RedGrittyBrick | CC BY-SA 3.0 |