cm0002@lemmy.world to Technology@lemmy.worldEnglish · 1 month agoCoin-sized nuclear 3V battery with 50-year lifespan enters mass productionwww.techspot.comexternal-linkmessage-square49fedilinkarrow-up1140arrow-down19cross-posted to: [email protected]
arrow-up1131arrow-down1external-linkCoin-sized nuclear 3V battery with 50-year lifespan enters mass productionwww.techspot.comcm0002@lemmy.world to Technology@lemmy.worldEnglish · 1 month agomessage-square49fedilinkcross-posted to: [email protected]
minus-squareBlue_Morpho@lemmy.worldlinkfedilinkEnglisharrow-up9arrow-down6·1 month agoGoogle says a Casio watch needs .004mA so not quite enough.
minus-squarednick@sh.itjust.workslinkfedilinkEnglisharrow-up26·1 month agoDid you typo or did he? .03 is significantly bigger than .004
minus-squareLibra00@lemmy.worldlinkfedilinkEnglisharrow-up22·1 month ago0.03 is 7.5x more than 0.004 tho?
minus-squareBlue_Morpho@lemmy.worldlinkfedilinkEnglisharrow-up15·1 month agoYou are right! I didn’t count the 0’s!
minus-squaresugar_in_your_tea@sh.itjust.workslinkfedilinkEnglisharrow-up8·edit-21 month agoThat’s definitely in the ballpark though. Surely they could cut 25% power draw to support a 50 year battery.
minus-squaremesamunefire@lemmy.worldlinkfedilinkEnglisharrow-up1·1 month agoI wonder how much we really need for a clock (555 eq) to work?
minus-squarepiecat@lemmy.worldlinkfedilinkEnglisharrow-up3·1 month agohttps://www.ti.com/lit/gpn/LM555 2mA minimum, and that’s just q current. It’s gonna be much higher when you’re actually using it for a clock. I’m sure the casio’s main power sink is the display. I bet the refresh rate could be reduced for better battery life.
minus-squareTangent5280@lemmy.worldlinkfedilinkEnglisharrow-up6·1 month agoIsnt the refresh rate just 1 Hz?
minus-squarecubism_pitta@lemmy.worldlinkfedilinkEnglisharrow-up1·edit-21 month agoA lot more than that. 2ma Analog circuits are weird though https://www.ti.com/lit/ds/symlink/ne555.pdf
Google says a Casio watch needs .004mA so not quite enough.
Did you typo or did he? .03 is significantly bigger than .004
0.03 is 7.5x more than 0.004 tho?
You are right! I didn’t count the 0’s!
That’s definitely in the ballpark though. Surely they could cut 25% power draw to support a 50 year battery.
I wonder how much we really need for a clock (555 eq) to work?
https://www.ti.com/lit/gpn/LM555
2mA minimum, and that’s just q current. It’s gonna be much higher when you’re actually using it for a clock.
I’m sure the casio’s main power sink is the display. I bet the refresh rate could be reduced for better battery life.
Isnt the refresh rate just 1 Hz?
Yep.
A lot more than that. 2ma
Analog circuits are weird though
https://www.ti.com/lit/ds/symlink/ne555.pdf