cm0002@lemmy.world to Technology@lemmy.worldEnglish · 8 months agoCoin-sized nuclear 3V battery with 50-year lifespan enters mass productionwww.techspot.comexternal-linkmessage-square31fedilinkarrow-up1113arrow-down17
arrow-up1106arrow-down1external-linkCoin-sized nuclear 3V battery with 50-year lifespan enters mass productionwww.techspot.comcm0002@lemmy.world to Technology@lemmy.worldEnglish · 8 months agomessage-square31fedilink
minus-squareBlue_Morpho@lemmy.worldlinkfedilinkEnglisharrow-up8arrow-down5·8 months agoGoogle says a Casio watch needs .004mA so not quite enough.
minus-squarednick@sh.itjust.workslinkfedilinkEnglisharrow-up21·8 months agoDid you typo or did he? .03 is significantly bigger than .004
minus-squareLibra00@lemmy.worldlinkfedilinkEnglisharrow-up16·8 months ago0.03 is 7.5x more than 0.004 tho?
minus-squareBlue_Morpho@lemmy.worldlinkfedilinkEnglisharrow-up12·8 months agoYou are right! I didn’t count the 0’s!
minus-squaresugar_in_your_tea@sh.itjust.workslinkfedilinkEnglisharrow-up8·edit-28 months agoThat’s definitely in the ballpark though. Surely they could cut 25% power draw to support a 50 year battery.
minus-squaremesamunefire@lemmy.worldlinkfedilinkEnglisharrow-up1·8 months agoI wonder how much we really need for a clock (555 eq) to work?
minus-squarepiecat@lemmy.worldlinkfedilinkEnglisharrow-up3·8 months 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-up5·8 months agoIsnt the refresh rate just 1 Hz?
minus-squarecubism_pitta@lemmy.worldlinkfedilinkEnglisharrow-up1·edit-28 months 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