The amount of busted modules ive got over the years ive started to buy the SMD individual parts so i can swap them out as the most important part of the module is the PCB itself. And much harder to make for folks just getting into electronics and electrical engineering :) So i just went to Mouser UK (International Company & this is being used just as an example of how to search for one's own self, use whatever you feel comfy with) So search for the exact or close-enough characteristics of the inductor we need for these projects and I've found 14 results in the list after narrowing it down but only using what info is specifically in that Datasheet snippet above, here's 2 pictures from screenshots from me own desktop to further illustrate how to better search for exactly what you need and asked for, or be in the ball-park for better choice options than without these sort of searching: MT3608 step up booster converter module is a small sized highly efficient and low cost module is built for converting or boosting the voltage as low as 2V to max 28V DC with the maximum output current of 2 ampere. The output voltage can be adjusted with the variable resistor used in the module. BUT the most impressive is YOUR 3D RENDERING of this module - PLEASE Please please could i kindly beg you; Vyvarujte se stavu kdy je na vstupních svorkách vyšší napětí než nastavené na výstupních! Může dojít k poškození měniče!

Not only that, it would also be a most-excellent thing to also see a basic "schematic" of this module using the same sorta software, like the free to use CADsoft Eagle, or when it used to be, i cant remember now as im old, lol MANY other softwares out there for making one's own PCB's (which i would NEVER charge anyone to help make their own PCB's, after all, its just the board designs of simple modules so if one ever wants a hand in doing so, lemmi know !!) When the same wall charger is connected directly to the microUSB port on the RPi, everything works flawlessly. A boost converter(DC-DC step-up converter) is used to step up a lower voltage to a higher voltage level with quite a simple circuitry. It is a type of switch-mode power supply as it uses a switching device to regulate the voltage. In our case, the switching module is the MT3608 IC which has a high switching frequency of 1.2MHz. The higher switching frequency also opens up the possibilities to use smaller indicators making the module compact and also providing high power output simultaneously.

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Nice touch, a limitation: as mentioned, it introduces a voltage drop of 0.65 V (or so). This voltage drop is current dependent, so you can’t really regulate this away easily using the variable resistor. In theory, it should provide 5v (output of the MT3608) when powered either from USB wall charger or from 18650 battery (through the TP4056). The Mosfet will do the switching between mains and battery. Před prvním použitím je tedy nutné použít vstupní napětí 2Va nastavit požadované výstupní napětí. Potom lze na vstup připojit zamýšlené nižší vstupní napětí. Specifikace: I meassured the output voltage and it is stable when the RPi is off as well as when it is on (4.9v ~ 5.1v). The boot up sequence tipically consumes about 150-300mA on a Raspberry Pi B+ I use to prototype. how did you make that 3D Render - did you do it yourself with a software/s like the Eagle software with Eagle-Up plugin and 2 other softwares to show us our own Schematic/PCB designs in glorious 3D as your rendering is.

I know what you're asking, basically are there any equivalents or alternatives to the inductor choices that fall within the criteria of the datasheet and where i do humbly think, personally, that this info will further benefit ANYONE/as many as possible when they also read this answer, so not only for the original question post's author, but i surely hope everyone too, here goes: Another thing to mention when working with power modules like converters is that they will burn out if the current goes too high. I believe that you have already understood that from the step above, but how to protect the IC from the high current? still use a resistor between the output terminal and the load, but instead of connecting the emitter of the transistor to the output, connect it at the terminal between the coil and the diode. This has the effect that the voltage drop of the diode also helps in getting tot the 0.6V required to turn on the transistor. Depending on load, the forward voltage of the diode is 0.2 V and higher ( https://www.onsemi.com/pub/Collateral/SS39-D.PDF, figure 3) Fotografie výrobků jsou pouze ilustracemi na ukázku a někdy se mohou lišit od skutečného vzhledu předmětu. Avšak toto nemění jejích základní vlastnosti.

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The circuit may need an extra capacitor between the base of the transistor to earth to counter any high frequencies that originate from the switching. It all depends on the delay of the enable pin. Here is the TP4056 Datasheet. Here is the MT3608 Datasheet. We are not going in to details of TP4056 (which is a charger circuit) and MT3608 (which is a DC-DC boost converter). The datasheets will give you a fair idea that the end output voltage will be regulated and linear. The module is using very less amount of components and the main component of the module is MT3608 IC. MT3608 is a highly efficient voltage booster IC with many built in features like over heat protection, low quiescent current, soft start function, low external components, overheat shutdown etc. Other components used in this module are two ceramic capacitors, one variable resistor, one resistor and one schottky diod and a 22uH inductor which is an important part of all voltage booster circuits. Lift the diode of its pad at the connection to the output, and insert your current sense resistor in series with the diode. Then put your transistor over either the current resistor, or over the diode and current resistor, as described before.