Timeline for Maximum power rating for Arduino UNO revision 2 (SMD)
Current License: CC BY-SA 4.0
11 events
| when toggle format | what | by | license | comment | |
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| Jun 13, 2019 at 16:49 | comment | added | AJP |
It's definitely ON RUX 177-5 but maybe they made a typo ;P @Juraj
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| Jun 13, 2019 at 16:35 | comment | added | Juraj♦ |
ON RUR 117-5 is made by Chinese "ON Semiconductor" :-)
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| Jun 13, 2019 at 16:29 | comment | added | Majenko | @Juraj I know. The NCP1117 is NCP's copy of the LM1117. The two are one and the same. But that's a moot point since The OP has an R2 not an R3! | |
| Jun 13, 2019 at 16:27 | comment | added | Juraj♦ | @Majenko, OP has in Question NCP1117 not LM1117. According to schematics orginal Uno R3 uses NCP1117ST50T3G | |
| Jun 13, 2019 at 11:15 | vote | accept | AJP | ||
| Jun 13, 2019 at 10:34 | answer | added | Majenko | timeline score: 2 | |
| Jun 13, 2019 at 10:17 | comment | added | Majenko | If you're running from batteries then you definitely want the added efficiency of a switching regulator. | |
| Jun 13, 2019 at 9:49 | comment | added | AJP | Thank you very much @Majenko . It makes sense now that this is a clone (I got it from a friend who would have just ordered it from the cheapest place)... that's what was tripping me up. Input voltage is 4 x 1.5V AA so ~6V. I will get a proper step down converter. Please add as an answer if you wish. | |
| Jun 13, 2019 at 9:34 | comment | added | Majenko | Better to get a proper switching regulator that can cope with the current without melting. | |
| Jun 13, 2019 at 9:32 | comment | added | Majenko | The Arduno UNO SMD R2 uses an MCP33269 not an LM1117.What you have is probably some cheap Chinese clone of the Arduino, and in that case the regulator will be the cheapest Chinese copy of the LM1117 available. Impossible to tell what the specs of that specific chip are.Suffice it to say, though, that the specs of the chip are pretty much irrelevant since they rely on good heatsinking, which you most certainly don't have on a little Arduino board.500mA though is a lot to push through a linear regulator like that (depending of course on your unspecified input voltage which is a critical factor). | |
| Jun 13, 2019 at 9:27 | history | asked | AJP | CC BY-SA 4.0 |