Hello,im new in this.Can I charge LiPo battery using arduino port with TP4056.How can i charge battery ture same Port?
The Arduino is not a power supply. The 5V output is intended at most to power a couple of small sensors or LEDs.
Best to use a phone charger or other wall adapter to charge batteries, or a PC USB port.
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Hello, I want to power the TP4056 from the Arduino, which will charge the battery. When the Arduino is disconnected from the external power supply, I want the battery to be the power source. Is this possible?
This would work but there are better methods available. Use a 3C lipo battery pack and connect the charger. Then connect VIN of the Arduino to the batteries. VIN of the Arduino has a regulator which will add filtering to the power supply but also protect the Arduino as the batteries internal impedance increases over time. When this impedance goes up the terminal voltage of the batteries will also rise when being charged. This will give you a UPS as I interpret your question. Nice part this solution does not need Arduino pins. You can look up float charging for a better explanation and sizing information.
Indeed an Arduino UNO is not a power supply.
Most of the TP4056 charger boards I have seen draw way more current (to charge the battery) than Arduino UNO can supply.
A TP4056 charger board is also for a single 3.7v nominal Lithium battery, which on its own is not enough to run the UNO which needs 5V.
Yes. You will need a SMD solder station, MOEFETS, 1% resistors, a daughter board to hold the parts to modify the TP4056. And look up how to modify the TP4056 for some such thing as I can't remember right now. I recently saw a post on this site, last 6 months, about some TP4056 modification stuff that should work. You will get very low battery charge current by supplying the TP4056 from an Uno or most any micro controller.
The TP456 charges great with an input of 6V, it can take up to 8 volts. You can get a 6V wally wart for the Uno, make it at least 2 amps for non-switching and 3 for a switching supply, and tap off the wally wart to feed the TP4056.
Overall you'll want to have the Uno as a load to the TP4056 with the battery connected to the TP4056. Now a single Lipo will give on its best day 4.8V for a minute or so. Way too low to run a 5V MCU. So you should consider using a 3V3 MCU. Which means the LiPo will put out too much V's. To solve that issue, get a 3.3V LDO. Put a good filtering cap on the LDO output as close as to the MCU as you can physically.
If the modifications to the TP4056 are not done, you'll still need the filtering cap and an LDO. Expect the LiPo to last about 4 months.
The TP4056 is limited to a 1 amp output. That's total current to the load and to charge the battery.
I am with the other posters and using a TP4056 in the manner as described in post#1 is less than a good idea. So yes, if you ignore the excellent suggestions to "not to do it this way" and go ahead and do it anyways it's possible and it is less than ideal and you will have problems.
There is a surface mounted resistor on the average TP4056 board, obvious when you look a the TP4056 datasheet, that controls the charge current. On some TP4056 boards it can be a value that sets the charge current at 1A.
4.8V ?
Charge cutoff should be 4.2V ?
Yes out of the box those units usually come with a 1.2K resistor to the 'prog' pin and GND. The ideal charging current depends on the size of your LiPo.
You are taling about a complete board. The TP4056 is actually just an IC which can charge LiPo;'s with some extra components. the TP4056 itself can not be modified.
Works fine with 5v as well.
Or use a MT3608 to convert whatever is the voltage of the LiPo (between 3.7 - 4.2v ) into the 5v you want.
problem can include the LiPo exploding.
LiPo chargers are not beginners material, and the TP4056 does not allow for load-sharing, this means that there can not be anything else connected to the battery in such a way that while it is charging it is drawing current from it. This will cause the TP4056 to keep charging even when the battery is already full, and this is particular can cause the battery to overheat and explode.
There should be no load while charging !!!
Well with the 1.2K they draw about 1Amp which is double of what a USB port can normally supply, If you power it with less than what it can draw, results can be unexpected, which is not what you want.
As stated before, the size of the battery is rather relevant for the charging current. For a 1A charging current, you need at least a 500mAH LiPo that means you will charge at 2C and it should take the battery 30 mins to get to full from empty. I usually go for 1C. Anything above 2C is considered 'unwise'
Shows us the circuit that you intend to use and we can comment. Do not just start experimenting. I LiPo exploding is not nice.
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