How to build your Simple DIY solar night lamp or mini solar street light

Another version of DIY solar night lamp that uses TP4056 board as battery protection and just one external component SS9012 PNP transistor that acts as auto on/off switch for the LEDs. One of the basic and easy to build solar night lamp / mini street light
Using 3.5W/6V Solar Panel, 2pcs 18650 lithium batteries and 3pcs 1W LEDs
PS: in case that the light will not last overnight due to cloudy conditions in your area. Connect 1k ohms or 2.2k Ohms 1/4W resistor in series of pin 2 of 9012 transistor going to the input + of TP4056 board.

[@tushar673353]

i have build this circuit and it works ...i have used 800mah li ion battery and 6v 100mah solar panel. and 1w led for mini garden light. transistor i have used is bc177b.

[@hendry28channel31]

I have tried it and it works, the voltage source of the 5 volt mobile phone charger, I use the tip42c transistor because if using 9012 lights less light, I also use tp4056 without protection (cheap), load using 5 volt usb led light. I use for emergency lights if the power off automatically turns on and works. Thank you for inspiring me, may you succeed.

[@edmundbrisenio2286]

Hendry Prasetyo cool!!!

[@lumenssolarlights6061]

How many hours it works per day ?

[@raiosis]

Hi, just wondering if you connect the tip42c the same way as how 9012 connected on this video? Thanks

[@ALEFILES]

@hendry28channel31 YES, I have wondered the same as you about the maximum current that the 9012 could drive, and you are right, using a more powerful transistor (e.g. TIP42c), will drive more current and the leds will shine with more brightness😂 Greetings from Argentina!😂

[@ALEFILES]

​@@raiosis Yes, you are right, because the TIP42c is a PNP transistor as the 9012 is...BUT READ in the TIP42c datasheet the correct location of the emitter, base and the collector... Greetings from Argentina!😂

[@mi4deorosrenault475]

Gracias por aportarle a un mundo mejor, gracias

[@ALEFILES]

Saludos desde Argentina (el segundo país con MAYOR inflación del mundo)...

[@barryrudolph9542]

I would recommend a resistor between the IN+ and the base (pin 2) of the transistor. You can get away without one but it is not a good practice.

[@jefrebiason4564]

why sir?

[@egorbiletskiy2950]

Great to see that Avasva has new instructions to save my money and energy to build it.

[@tabaccopuro]

Love this one. Will definitely make it too.

[@emre-uc1zh]

why we use 9012 transistor ? Can you explain the purpose of 9012 in this circuit?

[@ALEFILES]

The transistor act as a switch: when the sunlight illuminates the panel, the (+) polarity of the panel blocks the base pin of the transistor (because a PNP needs a NEGATIVE polarity in its base, to switch on), so the transistor doesn't drive current thru the collector, and is like a switch in the "off" position. On the other hand, when is night, the panel hasn't any possitive voltage, and the resistor polarizes to negative the base, and the transistor switches to ON, and can drive the current from batteries to the leds... I strongly suggest to change the 9012 for a TIP42c PNP transistor, because this one drives more current than 9012... Greetings from Argentina!!!😂 (the second country with MORE inflation in the world)

[@Alan-yd5pc]

How to connect using a NPN (2N2222) transistor?

[@kaustubhsirdesai1810]

I followed the same but its not working can you please help me out?

[@generalawareness101]

Am I reading the circuit right where the resistor will just make it turn on later so it requires even darker outside before it turns on?

[@anoopanand7619]

Can use XL 6009 DC booster in this project for 10 watt LED bulb?

[@ndea2005]

Thank you once again

[@raiosis]

Hi. Just wondering if i need to change any materials if using 2x6volts panel instead of one? I live in an area where daylight is shorter. Thanks

[@vac91]

what votes are the 18650's ?

[@phongvo955]

If I use 3 leds 9w (1 led / 3w), how much resistance is required? and how much battery capacity is needed to light 10 hours. Thank you

[@edmundbrisenio2286]

It is not intended to use in a high power leds

[@reviloaloja3950]

Can i use 9015 transistor

[@ndea2005]

Thank you so much

[@miteshdhanani]

Have asked something but no one has answered it’s been almost a month

[@cvbeltran010759]

On po ang lights during daytime at off during dark. Ano kaya mali sa connection ko?

[@realidadalterna7091]

Saludos, puede usarse el NPN BD139. Hi, can i use the NPN BD139 Because mi leds are 3W 700ma?

[@edmundbrisenio2286]

Use S8050. But not that cirxuit... Use this. kzbin.info/www/bejne/h6fMg4N6n52WhqM

[@renzdavid4626]

Pwedi po ba s9013 dito

[@jaysoncinco948]

Sir blinking lang xa. Pano ko mwawala ung blink

[@miteshdhanani]

If we want to connect a switch then

[@DarrenGerbrandt]

Switch to turn off lights? If so just solder it into the + or - wire leading to the LEDs.

[@atakansisman9134]

Are they led or power led?

[@atakansisman9134]

and how to connect on off switch?

[@sushanthindalekar3549]

Hello Edmund Sir .. First a BIG THANKS ... Thanks a lot for your tutorials. Very well explained & very simple to make. i made 2 street light after going through your videos. they are working great. Thanks Again . Sir I have a question how can we make the leds brighter ? pls help & thanks again.

[@lumenssolarlights6061]

How many hours does it works per night ?

[@sushanthindalekar3549]

Lumens solutions it works for full night means dusk to dawn i am using three 18650 2000mAh batteries

[@miteshdhanani]

If on off switch is to be connected then

[@jabalr22]

can i use bc 547?

[@edmundbrisenio2286]

Yes. Just different pinouts

[@keshaborja8564]

You can find best solutions on Avasva website.