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3.3V to 5V converter in the library?
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nohkumado 4 years ago
Hello! i want to clean up my actual ESP project, and put everything on a PCB..... i am not at all used to tools like easyeda, so please bear with me! i found the ESP32 i am using in the library, somehow i managed to find some connectors that seem to fit (will have to print out the board to be sure) but one piece of hardware can't be fitted, i am not finding it in the library :[https://de.aliexpress.com/item/32851503557.html](https://de.aliexpress.com/item/32851503557.html) its a bidirectional 5V to 3.3V converter  unfortunately there i no inscription about a type on the circuit, nor on the webpage.... searching for the maker (diymore) gives only back a Oled driver.... logic level converter also yields nothing usable.... so i tried to make a new scematic lib, but that editor is even more obscure to me than the main one.... i made a pseudo scematic (no idea how that thing works in reality) because i simply wanted to draw where the pins are... but failed miserably.... so how do i find that converter? or how do i draw it? thanks in advance! Bruno
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andyfierman 4 years ago
Hi Bruno, Welcome to EasyEDA. Please read: [https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a](https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a) Then read (2), (4) and (6) in (2) in the above. The section (2.3) explains in more detail how to deal with Schematic Symbols and PCB Footprints. Then you will  appreciate the importance of sourcing. properly documented components and modules. :)
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andyfierman 4 years ago
For clarity: I think that by "bidirectional 5V to 3.3V converter" you mean a bidirectional 5V to 3.3V logic level translator and not some sort of power supply.
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andyfierman 4 years ago
I know what these converters do and how they work. Here's a page explaining it: [http://www.hobbytronics.co.uk/mosfet-voltage-level-converter](http://www.hobbytronics.co.uk/mosfet-voltage-level-converter) The parts you're looking at use BSS138 N channel MOSFET transistor clones from assorted places in the far east. Here's the datasheet for the original part: [https://www.onsemi.com/pub/Collateral/BSS138-D.PDF](https://www.onsemi.com/pub/Collateral/BSS138-D.PDF) LCSC has stock: [https://lcsc.com/search?q=bss138](https://lcsc.com/search?q=bss138) So, you don't need to buy a module and look for a module symbol and footprint. Just put the the individual transistors and resistors in the schematic and mount the parts directly on the PCB.
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