Timeline for LVD solution with low power indication
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
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| Apr 13, 2017 at 12:32 | history | edited | CommunityBot |
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| Jul 10, 2014 at 16:14 | vote | accept | Martin Ždila | ||
| Jul 10, 2014 at 16:14 | vote | accept | Martin Ždila | ||
| Jul 10, 2014 at 16:14 | |||||
| Jul 8, 2014 at 18:52 | comment | added | Ricardo | But I agree that you should not accept an answer that fast. Wait a bit for more answers (say a day or two) then you choose one to accept. | |
| Jul 8, 2014 at 18:22 | comment | added | Ricardo | I don't think you'll really have this problem with this circuit, because you can have your MCU watch the voltage and avoid writing to the SD card or flash memory if voltage is not high enough, even while the Go! button is pressed. The brownout detection circuitry in your MCU won't allow it to corrupt its own flash memory. Besides, to avoid over-discharging your NiMH batteries you'll probably want to cut off power when they reach 1V each, or 2V total. That's well above 0.8V minimum required by your step-up regulator. So you'll always have clean power. | |
| Jul 8, 2014 at 17:53 | comment | added | Martin Ždila | Thanks for the answer. I mark is as useful because I didn't know about this, but I won't accept this answer so far: The problem is that if the voltage is just one bit above the critical value and the Go button is pressed then my circuit is powered by unreliable voltage which can drop below critical value while Go is still pressed. I would like to avoid that as I am using flash/SD memory and it could leave it in inconsistent state. So maybe this solution needs just some tunning to fulfill this requirement. | |
| Jul 8, 2014 at 17:47 | history | edited | Ricardo | CC BY-SA 3.0 |
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| Jul 8, 2014 at 17:32 | history | edited | Ricardo | CC BY-SA 3.0 |
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| Jul 8, 2014 at 17:27 | history | answered | Ricardo | CC BY-SA 3.0 |