Solar charger garden light with 3v battery

803

19:11:18

It charges in the day time(light "off"), and it discharges at night time(light "on") being used. Every 5 seconds is an hour of usage. 

FILAMENT BULB-------SUN LIGHT(DAYTIME) 
POWER SOURCE------SOLAR CELL
SPDT SWITCH----------DAY/NIGHT TIME
4F CAPACITOR---------RECHARGEABLE BATTERY
BLUE LED----------------NIGHT LIGHT

published 10 years ago

GingerKing

10 years ago

Why is every 5 seconds in simulation equivalent to an hour of usage?

Voltransistor

10 years ago

Because, it shows how it the battery(capacitor) dies, so you can charge it again without waiting on this simulation for 8 hours just to see it go out.

GingerKing

10 years ago

Oh okay. I honestly thought you were going to build this design with a 4F capacitor. Thanks for clearing that up. Looks good to me.

Dufniall89

10 years ago

Why use three transistors? You can do it with two. Is it any better?

Voltransistor

10 years ago

@Gingerking-your welcome. Lol. @Dufniall89-Technically you can, but it's a positive output for the LEDs, and the diode for charging the battery is also positive, so I used a third transistor(PNP).

hurz

10 years ago

I am missing a correct resistance of a solar panel. Even it would be a big one its not 0 Ohm. Its more in a range of several 100 Ohm. Keep it up!

faceblast

10 years ago

i have a 2V 250mA panel, does that make it 8Ω

hurz

10 years ago

Its a bit oversized ;-) however 2 of them would have already 16Ω

nikis

10 years ago

Чё

solartech

10 years ago

I love this project, but am using 12v240watt panel, how can use it on my security lamp?

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