HOW TO: Use Lithium 3.7v batteries in small Arduino projects.

good afternoon today's video is very short very simple I'm going to show you how incredibly easy it is to use three point seven volt lithium rechargeable than your project these particular ones here are three point seven volt six there are 18 18 650s and very standard battery you find them in all kinds of places order them online dig the motive old laptop the Tesla has a thousand of them in there or more literally a ton of them and they're very common batteries very much of a standard but there's lots of other three point seven volt lithium batteries this one comes out of an apple product puts out 3.7 volts as a positive has a negative and can be charged and discharged the same way as I'm going to show with these these are great you can mount them in your projects very easily there's all kinds of battery holders like this now just as a comparison I've got a triple-a here and here is the difference in a triple-a and the 18 650 s so you can see there's quite a size difference you can use a standard battery holder but there's lots of battery holders here's one for one here's one for four I've got all kinds for threes and twos so and so forth and these are in series and so really you can just figure how many volts by multiplying the 3.7 by the number of batteries in series and it's all pretty straightforward but these particular charge management things are only good for one battery at a time so we'll talk about that in a bit how to do multiples but what you have to be aware of when you're charging these battery says you can't discharge from past 2.5 volts or it's dead you can't put too much charge much I don't think you could even go to 4.2 volts for charging them or you've killed it and you can't charge it to four point one volts or much more or you've killed it so then you can't put the charge in too quickly or you've killed it but these manage all of that or they'll manage it for the charging this one this is a TP 40 56 very good for charging batteries and these are the older units USB capable but I like these ones these are zero three nine six two A's and they will both manage the charge and discharge and at 50 cents a pop you can just throw them in your projects and largely forget about it and they've got USB or you can put on these to mount points you can put 5 volts in these two wires here go to your battery and there's two more mount points out positive out negative right here in the air on the other corners and that's where you would connect it to your project so if your project tries to drain the battery below 2.5 volts it will say no and hang up on your project so very very simple I've got one here all mounted into a single thing so there's a TP 40 56 all good to go and so the little little groove here always indicates positive on these batteries and of course most things the spring is unmarried in and you see a little red light turns on there and that red light means it's charging beside it is a blue light that will go blue when it is fully charged now this batteries got a pretty good charge in it so we'll just connect this to multimeter here and you can see it's probably gonna be a bit under 4 3 0.995 there we go so now when these are fully charged they'll give you a reading of about 4.1 but once you put them under a bit of load they usually drop to about 3.7 and will stay at the 3.7 for the bulk of the discharge and then rapidly drop down toward the 2.5 where they should be cut off so we could just as easily be wiring these charging modules into a battery like this there's lots of three point seven volt lithium ions that are available for cell phones and whatnot great to use in projects now where it gets a little complicated is this module here will charge 13.7 volt battery really at a time so if you've got for them wired up in series you'll need stuff that we're really not going to talk about much in this video but there's lots of modules like this where you can wire more than one battery in you follow the sort of a specific wiring pattern where it goes into each one of the batteries and it will help manage the power going in and out of the battery a bit better but for a lot of cases I find one battery being charged at time is fine and very simple solution for keeping your project going and now getting power out especially when you're using one at a time this will put out as I say somewhere between 4.1 and down to 2.5 volts which means you may not be happy with that lower voltage so that's why you can often wire them in series to get more and more volts but if it's a very low draw project so say you've got an Arduino it's small the Arduino by the way is happy with 1.8 volts up to about 5.5 one of these could directly power an Arduino for a very long time and I don't know probably a hundred hours for many Arduino projects and but you might have some other units that require 5 volts in order to work so there's lots of interesting things this one is a little converter you put in here on these two little mount points you put some amount of volts I think it's from about point 9 up to 5 volts and this guy here will play little games with the power and give you USB 5 volts out of a battery that isn't 5 volts and the efficiency is fairly high you do lose a little bit into the circuitry but this will actually give you 5 volts for your project in a very small cheap package I don't know how much these are 20 cents each not much so if you have something a circuit like this one for charging a discharging mind with a circuit like this you can actually very nicely manage your power requirements for many little electronic projects and it's just that straightforward it's very very simple using these you don't have to worry about all the complexities of charging and discharging lithium's the only thing that I would say to be aware of is that you don't discharged lithium too rapidly so one little lithium here powering a very large motor could overheat the lithium battery in that well there's another way to kill it but for powering LEDs small motors Arduinos whatnot one of these batteries is fine a few of these batteries is great and for larger motors then instead of putting these four packs together or even putting four packs together in parallel or series to make huge amounts of amp power is available to the project anyway it's just that simple just use these modules and you don't have to give it too much thought I'll put some links and whatnot or some details on these modules and I've hope think I'll even put up a wiring diagram ed positive to positive negative to negative anyway if you have any questions comments whatnot you can put them into the comment section I'm happy to answer and voting and subscribing is actually quite helpful because it makes the videos um sort of rise up the ranks anyway thank you very much for watching and have a great day

Channel: LessonStudio

Views: 84,374

Rating: 4.5797668 out of 5

Keywords: Lithium Batteries, Arduino, electronics, robotics, 18650, TP4056, 03962A

Id: nh9lEM5L28k

Length: 7min 55sec (475 seconds)

Published: Sat Mar 19 2016