Timeline for Microcontroller self-shutdown with MAX682
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
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| Oct 20, 2014 at 17:42 | comment | added | user17592 | For reference: I checked this now and it works fine. I used R1=100K, R2=39K, R3=300K (2x150K) which works fine - at least with the 2mA this circuit draws. I used two simple 1N4148's, and I didn't use R4 but applied the voltage divider's output to R1, as discussed. Thanks again! | |
| Oct 20, 2014 at 12:07 | vote | accept | CommunityBot | moved from User.Id=17592 by developer User.Id=3545 | |
| Oct 20, 2014 at 12:03 | comment | added | tcrosley | @CamilStaps Re the voltage divider resistor values, that's why I said in my answer you would have to recalculate everything. I don't think it matters it comes out exactly the same. I think the diodes are a good idea. | |
| Oct 20, 2014 at 11:31 | comment | added | user17592 | On second thought, when we'd remove R4 as suggested, the current going into /SHDN wouldn't be doubled anymore, right? Should I add diodes between the switch and R1 and between the voltage divider and R1, to make sure no current can flow from the battery to the voltage divider or vice versa? | |
| Oct 19, 2014 at 22:03 | history | edited | tcrosley | CC BY-SA 3.0 |
added 134 characters in body
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| Oct 19, 2014 at 21:59 | comment | added | user17592 | You are right, I was too lazy to add all capacitors to this circuit, but the MAX682 datasheet prescribes 47uF. Good point about the 'double input' time, thanks! | |
| Oct 19, 2014 at 21:56 | history | answered | tcrosley | CC BY-SA 3.0 |