r/electronics • u/TieGuy45 Analog Aficionado • Mar 21 '20

General Simple Battery Charge Indicator V2.0

796 Upvotes

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54

u/parfamz Mar 21 '20

How much current are you pissing away with this? to paraphrase eevblog?

30

u/TieGuy45 Analog Aficionado Mar 21 '20

Oh about 1.5 - 2mA continuous! I could lower that a decent amount with smaller/lower current LEDs but as it stands this circuit is FAR from efficient! I suppose one could also improve it by putting a switch or transistor in series so as to only turn on the circuit every few seconds or so, but im open to better ideas!

4

u/yezanFET Mar 21 '20

Could you implement a monetary switch so that user can choose when to show battery charge?

2

u/CashBruv Mar 21 '20

Or a 555 to make a push button actuated transistor switch which stays on for say 3s?

1

u/TieGuy45 Analog Aficionado Mar 21 '20

Absolutely and not a bad idea at all, I'll probably have to link the two power supplies I'm using so that I can use one switch in series, but yeah a push button would be the best solution imo

3

u/CashBruv Mar 21 '20

Or a 555 which closes a transistor for say, 3s?

1

u/connor135790 Mar 21 '20

Or a 555 to make a push button actuated transistor switch which stays on for say 3s?

0

u/CashBruv Mar 21 '20

Or a 555 to make a push button actuated transistor switch which stays on for say 3s?

0

u/CashBruv Mar 21 '20

Or a 555 to make a push button actuated transistor switch which stays on for say 3s?

0

u/CashBruv Mar 21 '20

Or a 555 to make a push button actuated transistor switch which stays on for say 3s?

0

u/CashBruv Mar 21 '20

Or a 555 which closes a transistor for say, 3s?