Simple Light Sensor Circuit - Leds on by night off by day (tree of light) JB

[TXTCLA55]

Could I get an exact list of the parts you used? Thanks.

[ThePrudhviram]

what is 40k here,please tell me........

[lolymoore]

i have been looking for that same project on how to do it please give me step by step on how to ( an it there some were i can get flexible board to at a cheap price ) if so please let me no thank u

[insAneTunA]

I finally ordered some photo diodes and 16 ultra bright LED's I'm going to modify my garden lights from 12 volt light bulbs into LED lights, I want to use this circuit to control my garden lights. I'm using a car battery and 4 small solar panels. The panels are normally used to keep an unused battery charged when the battery is stored. Each panel is only 125 mA but 4 panels should be more then enough to keep the car battery charged.

Greets from Holland, iT

[JohnnBlade]

@insAneTunA you could also use a joulethief inbetween yr solar and LED's

then probaly u could use 1 or 2 solar panels.

laat me weten als je het gefixed hebt ;)

groeten van Amsterdam

JB

watch ? v=KteDmnm4H2k

[insAneTunA]

@JohnnBlade Ja dat is goed -) Didn't receive anything yet, maar I think it will be in deze week. I have a few meter thin spoel wire, en een paar different transistors waarvan er 2 big boys zijn, en een paar verschillende ferriet kernen. I also tested een paar small trafotjes, en sommigen also worked with a joulethief circuit....LOL

[insAneTunA]

Heb 1 fotodiode geeft 260 mV, 1 40K weerstand, 1 ultra bright LED 3.4V 25mA, 3x oplaadbare batterij totaal 3,8 volt, 1x 2n2222 transistor, maar krijg het niet aan de gang. Heb ook met nul tot 100K weerstand voor de LED getest. Joule thief werkt prima, heb tor vervangen voor metalen 2n2222 tor, tot mijn stomme verbazing kan ik nu 20 ultra brights redelijk fel oplichten met een enkele oplaadbare 1,2 Volt batterij, en het is dat ik niet meer LEDS heb, want volgens mij kan ik nog wel even doorgaan.

[insAneTunA]

@insAneTunA I am amazed, here I have 20 ultra bright LEDS (10mm) shining bright with only one rechargeable 1,2 battery !!! Previously I could light up a few small LEDS but I changed the transistor, one that never worked before, and all the sudden it works very well, and the circuit with 20 LEDS in Parallel is only drawing around 190 mA. These LEDS are rated for 3,4 Volt and 25mA each !!! Never had this working so well, I will record a video. 

[JohnnBlade]

@insAneTunA, it would be a miracle if u managed to light them up without a joulethief

or are you using a joulethief, cause 1.2v lighting up 20 bright LEDS, i gotta see that!, cant wait for yr vid

and what kind of transisstor did you use, i mostly/only use the 2n222 transistor for my joulethief

M.v.g

JB

[JohnnBlade]

@insAneTunA , goed werk man,( zag deze bericht niet, mijn vraag is daarmee beantwoord ), i have seen some people lighting up2 about 75 small leds on a joulethief, dus zeer goede besparende kerst lampen dit jaar :P

[insAneTunA]

@JohnnBlade hahaha ja inderdaad, nu ik zit er zelfs aan te denken om mijn hele huis van LEDS te voorzien, zoveel; verlichting gebruik ik niet. Ik heb een andere schemerschakeling gemaakt, van het circuit online forum, en deze schakeling werkt met mijn fotodiode, maar vooralsnog niet in combinatie met mijn joule thief. Ik ben geen expert wat betreft elektronica, ik bouw dingen na, en al doende leer ik bij. Video is in de maak, heb eerst alles overzichtelijk aangesloten op mijn breadboard :-)

[insAneTunA]

@insAneTunA Ik moest eerst jumper kabeltjes maken, wat een aardig klusje is. Want al die kabeltjes met kroko klemmetjes was niet echt overzichtelijk, en bovendien verbruikte het iets meer stroom. Groetjes,iT

[CosmicGnarler]

The simple circuits work the best. Thanks for enlightening us!

I like the music!

[JohnnBlade]

@insAneTunA, No thanks

i will show the circuit with solar, and i will test to see how the charging goes, you can hook up the solar by using 1 or 2 diodes so the battery power does not go into the solar panel then you hook up the plus of the solar to the plus of yr battery and the minus of the solar to the minus on yr battery, so if correct yr battery will charge during the day, it might be needed to also use a resistor inbetween, but i wil test that, and post a vid about it

[insAneTunA]

@JohnnBlade That would be awesome, I was afraid that I asked a stupid question. I realized that simply adding the solar panels with a diode should do the trick. If a resistor is needed then I would be glad to know. could you explain why the resistor might be needed? I don't know much about electronics, but the only way to learn is to ask questions :-)

[vickiipa]

@JohnnBlade Hi! John, your video is fantastic. How is going on with your experiment with the Solar? I'm working on a project of Solar cell. My idea is about using solar cell to hook the sunlight, then collect solar energy in rechargeable battery. Next connect the battery to light circuit like your video to make the light shine automatically at night when human walk pass. That is a reason why, I ask you about your testing whether it success or not. So I may success on my project too. Many thanks

[r66dTesla]

Nice work !

[JohnnBlade]

@r66dTesla , thnx are u going to build one?

[r66dTesla]

@JohnnBlade

yes i think i'd like to present this as a class project for the new stundents this year..it is something very visual when completed and can teach many fundemantal pricibles during the desing and build stages perhaps students could alter the deisng ... thank you for posting it .

R66D

[JohnnBlade]

@r66dTesla, no thanks, all my pleasure