Timeline for Running 3.3V MCU from LIR2032 Lithium-ion button cell
Current License: CC BY-SA 3.0
17 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 23, 2016 at 9:06 | vote | accept | Darko | ||
| Feb 22, 2016 at 22:18 | history | tweeted | twitter.com/StackElectronix/status/701893789166788608 | ||
| Feb 22, 2016 at 18:57 | answer | added | Passerby | timeline score: 2 | |
| Feb 22, 2016 at 17:42 | answer | added | Cano64 | timeline score: 1 | |
| Feb 22, 2016 at 17:00 | comment | added | Darko | Thanks I will look on datasheets to see what is current they consume when turned off. If it is low enough it may be solution to the problem. Do you have some specific regulator on mind? | |
| Feb 22, 2016 at 16:51 | comment | added | pjc50 | Your proposed transistor doesn't actually regulate the voltage down, and I'd start worrying about leakage through it. How about a regulator with an 'enable' pin to do the power gating? | |
| Feb 22, 2016 at 14:23 | history | edited | Darko | CC BY-SA 3.0 |
Added new idea of how this could be achived.
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| Feb 22, 2016 at 13:07 | history | edited | Darko | CC BY-SA 3.0 |
added 2 characters in body
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| Feb 22, 2016 at 12:10 | answer | added | Manawyrm | timeline score: 3 | |
| Feb 22, 2016 at 11:59 | comment | added | Darko | Yes, efficiency is the issue. Quiescent current is ~25uA, and my average consumption should be way below it (~1uA). | |
| Feb 22, 2016 at 11:45 | answer | added | Peter Smith | timeline score: 7 | |
| Feb 22, 2016 at 11:40 | comment | added | PlasmaHH | Be careful with just slapping on high amounts of capacitance, due to leakage you might increase your overall current consumption. I think your regulation question however might already have an answer here: electronics.stackexchange.com/questions/38782 if it doesn't maybe edit into your question on why it isn't sufficient, my pure guess would be that your efficiency requirements are not met, which would be nice to be expressed in numbers | |
| Feb 22, 2016 at 11:35 | comment | added | Darko | :) If I fail to find good way to convert voltage down using LIR2032, I may switch to CR2032. Regarding internal resistance I was hopping that ceramic capacitor of 1uF would be able to handle "high surges" when circuit is transmitting. | |
| Feb 22, 2016 at 11:30 | comment | added | PlasmaHH | whoopsie, right. | |
| Feb 22, 2016 at 11:29 | comment | added | Darko | You are talking of CR2032. I plan to use LIR2032 which are Lithium-ion batteries. The reason I am trying to do with LIR2032 is because I plan to add some small solar cell to be able to top-up the battery. | |
| Feb 22, 2016 at 11:22 | comment | added | PlasmaHH | First of all, 2032 are not lithium ion button cells, and their voltage drops quite quickly to the nominal 3V and also their internal resistance is quite high with ranging from 10-50Ω with designed loads of 15kΩ and draw of 200µA | |
| Feb 22, 2016 at 11:19 | history | asked | Darko | CC BY-SA 3.0 |