Anyone have experience using these? It boosts power from a lithium-ion battery to 5 Volts while acting as a battery charging module. Seems like a really great solution to cut down the need for a buck-boost converter.
If this works as I expect, I can cut out the lousy boost converter and use this as an all-in-one solution for powering 5V devices off my arduino. Any thoughts?
if OP is taking about these modules, he is in the right. Theese don't have any kind of built in protection and also are not ideal for 5V operation as they tend to fail on that voltage (in the form of voltage overshoot that fries everything) . The tiny module and the ones similar to them are more ideal to use in small projects as they use chips meant for powerbanks and have many types of protections and also are meant to work with low voltage unlike this bule atrocity.
Uh? The 2596 is the most reliable and forgiving buck module out there... Yes, it's big, but can work under no-load conditions, has stable output and a wide adjustment range.
Never seen one failing closed. When they typically fail (only after severe abuse) I have always had them fail open, never damaged anything downstream.
I've used probably 20 of these lm2596 buck regulators, and they were all fine for powering Arduino circuits in an escape room. I can't recall any failing, especially not by dumping 12v into the circuit expecting 3.3v or 5v.
I've used these a lot, and they can be a little temperamental from time to time. They're made for USB charging banks rather than a PSU, and I've found that some work perfectly, but others don't always provide power when you turn the Arduino on with a switch or something, and you need to either connect/disconnect the charging cable, or put a momentary short between the K pin and ground. Didn't work really for my usage, but there's definitely use for other purposes
EDIT - I should say that even across batches from the same supplier, I've found some that work fine, and some that need that extra something to start up - it seems to be random as to which will work as I need, even with the same conditions
They start along with the switch because of the trigger current and that's also the main issue when it comes to low-power projects. I used one yesterday to power an aftermarket capacity tester which draws extremely low current when the testing is completed . Because of this the power module just shuts off and i lose all my progress. I will use the adjustable voltage varient of this tiny module as they didn't have this issue and always stay active. As for bigger projects this works well too.
That's my issue, the start up current doesn't seem to be consistent across the boards. Some start, some don't. In the end, I swapped out for a charging board without the boost converter, and then a separate 3.7V to 5V board, which works perfectly
I’m building a low power project now that uses a 3.7 v Lipo. I just leared that the charger protection board I bought doesn’t work the way I thought it would. This is my first battery powered / low power project could you recommend a board that will let me charge the battery and connect an esp8266 that will be in low power mode most of time? The device wakes on movement. My initial plan was to use a TP4056 and connect it in parallel with the battery, I’m learning that wrong and I’m looking for the correct solution. I’m happy to provide more details if you like. Thank you.
Just like i mentioned in my previous replies , this one stays active all the time unless you disconnect the battery, you can adjust the voltage using that tiny potentiometer and this supports currents upto an amp or more. 2 leds for charge status too .Dont forget to change the resistor to set the current if you are gonna use a small battery.
Yes , just used one yesterday (fr) . And they are fine as far as boost modules go. But like most circuits meant to charge a phone(this is just a powerbank module without the USB port) they have a small issue. That issue is that the voltage conversion and output only kicks in after a certain threshold current. That current is about 60-30mA and varies with the IC use. This can be extremely problematic if you are making a low-power project and the case is same for any other module such as this one. The solution is another module that has adjustable output. It's output stays always active as you need that function to measure voltage while doing adjustment . But these don't have any type of level indication like the one you mentioned. Only 2 led for charging and charged state.
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u/spusuf 7d ago
You want to cut down the need for a buck boost converter by replacing it with a miniature buck boost converter?