jamilm9
0
- Joined
- Jan 12, 2008
- Messages
- 1,864
- Points
- 0
Ok I'm going to decorate my locker with leds.I'm going to power it with 3 d battery's. If my circuit needs 545.5 ma how long would the battery last.
LPF Donation via Stripe | LPF Donation - Other Methods
Links below open in new window
ArcticMyst Security by Avery
led power
- Thread starter jamilm9
- Start date
- Joined
- Jun 13, 2007
- Messages
- 5,410
- Points
- 113
3 D batteries in series or parallel? If they are in series then take the mAh rating of the battery and divide it by 545.5 and that will be how many hours it can stay on for those batteries. If they are in parallel do the same thing but multiply the answer by 3.
- Joined
- Mar 14, 2008
- Messages
- 1,402
- Points
- 0
A locker? Like one at school? Awesome!
- Joined
- Jul 27, 2007
- Messages
- 3,642
- Points
- 63
you have LEDs drawing half an amp? that's gonna be one bright locker....
- Joined
- Jul 27, 2007
- Messages
- 3,642
- Points
- 63
lol yeah, but that's a 900 lumen (theoretical) output - just a tad of overkill for a locker decoration 
- Joined
- Jan 12, 2008
- Messages
- 3,290
- Points
- 83
How about using a set of three rechargeable AA batteries and go for something little more discreet in light output?
Use one set of three a day and have another set charging at home and just change between the sets every morning.
That way you'll always have light.
Btw, if you're using a bunch of 20mA LEDs its ok to just give them 10-15mA each, they'll still be pretty bright and you save power.
Use one set of three a day and have another set charging at home and just change between the sets every morning.
That way you'll always have light.
Btw, if you're using a bunch of 20mA LEDs its ok to just give them 10-15mA each, they'll still be pretty bright and you save power.
MarioMaster said:lol yeah, but that's a 900 lumen (theoretical) output - just a tad of overkill for a locker decoration
That would be a good way to flash someone opening the door... ;D Though It would be overkill... Probably flashing him for too long. Like 2 weeks [smiley=evil.gif]
jamilm9
0
- Joined
- Jan 12, 2008
- Messages
- 1,864
- Points
- 0
I'm going to be using about 30 white leds from dx. I will only turn it one when i open it.
jamilm9
0
- Joined
- Jan 12, 2008
- Messages
- 1,864
- Points
- 0
how many mah does a good d battery have.I hope i can sell them for laser money.
