Maybe I've missed something, but I don't think this is correct. The TP4056 is a charge only device.
Dont beleive you. The output of the TP4056 module connects direct to the battery and the load is connected across the same connections as well. As the load does not go through the TP4056 module even if the TP4056 module were to shut down, the battery is still connected to the load.
Wrong, you're talking about these first version of the TP4056 modules, OP has posted the second version with battery protection features. Please read the Original post before replying to any of the later posts.
Fair point, although the original post has now been edited. However, a cut of voltage of 2.5V is way too low. Not a good idea to let the batteries discharge that low on a regular basis.
Fair point, although the original post has now been edited.
You can use a small photoresistor to get the lights to turn on when it gets dark and turn off when it's not.The TP4056 module has a discharge cutoff function that stops the battery from providing power when it's charge is too low to prevent any damage to the battery.Well, why didn't you say this before. You don't really need 3 batteries for that. A single 2600mAH 18650 has about 9.3WH so it can power you 0.6W LED for about 13-15 hours = more than enough to power your light from for a dusk to dawn.Them Panasonic 3400s will give you well above a 20 hour runtime. You just have to boost your battery voltage to attain 12VJust use 1x 5V (2.5W) solar panel for the setup I suggested. 500mA is more than enough to charge a single 18650 cell. At optimum conditions your panel will fully charge a 2600mAH cell within 6 hours.You don't really need MOSFETs for a 0.6W LED, Transistors will do the job. Just connect that photoresistor to the Transistor.Watch this example --> https://www.youtube.com/watch?v=eEBMTpxdPiE
My plan was to let the solar panel act as the photoresistor.
I may need significantly more capacity to get through a couple of cloudy winter days.
I can get something else if it won't do the job though.
That would work if your project is only meant for outdoors. I would suggest you use a USB power bank kit as it can both safely charge multiple batteries and also can output at a steady voltage.Try to get a regular straw hat LED with 3.5V 150mA rating and you don't need to worry about batteries in series or a voltage booster.
This is indeed meant for the outdoors. I need it to be a set it and forget it kind of thing.
I am ok with the battery bank idea, but I am not sure I have seen one that will stay on all the time. They usually require a button press to turn on after charging. If you know of one that is different let me know and I will check it out.
I have a few straw hat LEDs that I pulled from a busted headlamp. So that is an option. When the batteries are fully charged would that damage these LEDs?
Ok cool, you don't need a photo resistor for the outdoor project.Actually there are models that outputs without a button press. Like this one.Even if the batteries are not at full charge your LEDs will be damaged. You need to add a simple resistor to prevent that from happening. Here, this site will help you choose the right resistor value. Just make sure you set the source voltage to 5 volts since the power bank always outputs at 5v.
Perfect. I will get one ordered. I love aliexpress.
Where does the resistor need to be
and why? I am new to electronics and resistors still have me confused.