and thank you who read this topic 400 people i hope you learn from this topic

mybe i cancel the project becouse they will release the duet 3 with a nice set of feature but still in demo umm can we have spoiler dc42 please(joke) and they make board smaller and compact not to compact but hey

mybe they have usb c i hope
mybe flasdisk support in duet 4

mybe i will remove the topic when they release theduet or 2 or 3 day after my coment

+mitko about ramp they use same schematic as everyone but they use lower componen quality if you search in shenzen market there a lot of electronic component spart, the chinese manufacture is cheap many componen in may level like thickness of pcb (the copper 2oz to 1oz) the terminal screw in the lower side 20 to 10 a, in europe you need proper education but really im not design a commercial product it just for hooby and im just share with you with the warning but really dude like hobbyis like me cannot design boost buck regulator becouse safety something will explode and radiation in the forum we stuck with arduino board and ne555 timer(but everyone have brain you dont need electric education to tell that componen is good or bad)(and did you reliase how many people in my age love electronic i tell you rare)

many people forget this is just hooby project not production level i mean people like me this a big deal if all knowledge behind paywall and you not sure you will get it or not, im know im need proper education when your favovite education is behind paywall and age, im not super cheap guy but i pay will pay for something that worth it and i fully understand why they charge for it, after all all you need is piece of paper

im know that is rant but you can take it as grain of salt ot not

but still thank you for your help everybody i learn lot today how to design and what safety regulation

+safety regulation sometime save life or grab your money but mostly safe your life

@mitko about that im not make from scratch thoo im just copying from the original schematic remove that is not importad like ext conector if im remake from scrach im just kill myself

dc42 yeah i know i can use the original but it very pretigius ic (2$ and 6 pcs ava) and if somebody want beter one just change what they like and even beter

danal im try the design spark but (i dont like it) easy eda have dekstop version you can download it (i dont use the web version if my internet goes bad i cannot do anything)

about i want the smallast and cheapest
i want the smallest but i encounter some ic that no exspensive and bad performance for their price like mosfet that i want to change to the beter one

this mosfet that duet use
https://lcsc.com/product-detail/MOSFET_Infineon-Technologies__Infineon-Technologies-IPD036N04L-G_C152354.html
in nutshell
MOSFET N Trench 40V 90A（Tc） 2V @ 45uA 3.6 mΩ @ 90A，10V TO-252-2(DPAK) RoHS
price
1 x $1.3809
10 x 1.3443

the chip that i want to use
https://lcsc.com/product-detail/MOSFET_TOSHIBA_TPHR9003NL-L1Q_TOSHIBA-TPHR9003NL-L1Q_C129784.html
in nutshell
MOSFET N Trench 30V 60A 2.3V @ 1mA 0.9 mΩ @ 30A，10V SOP-Advance-8 RoHS
price
1 x $0.902
10 x $0.6714

reduce some penny but with beter componen

@mitko yeah i know and in indonesia is hard to find that school (becouse in my area is i would say lacking there exis but for electricty instalation and yeah you probabily right

+i found buck that not perfect but noot to bad xl semi

+i dont make decent product it just proof of concept beside that if someday that i learn in universty atlesh i know something from get go

+you board is soo small umm soo somebody is already make mini version (facepalm)

@mitko hey umm what buck regulator that you use i see you regulator quiet small im is fuck up in finding the best regulator

this the best that i can found
https://lcsc.com/product-detail/DC-DC-Converters_Texas-Instruments_LMR16030PDDAR_Texas-Instruments-TI-LMR16030PDDAR_C90665.html
from ti

but the problem is that there is en pin soo it need high in that pin mybe i just drive vcc to that pin the schematic (datashet is lacking)

@danal yeah i want to make smaller and mybe cheaper one if i can, you forget that i say remove the ext opt full sd card not the micro sd card that already solder in the board about tax and shiping umm i live in asia the tax and shiping is very expensive for big board (i can buy cloned, but for fun i made this project and they dont have gerber file soo i cannot make the pcb i must remake the schematic)

and about programing i dont change any pin just the hadware my mod is not to made zero change in firmware (becouse i dont understand how to coding)

+about his project is that mybe i will use my design but if i quit somebody can copy that and improve it
and mybe someone love full sd card but i not

UPDATE

I FINISH IN Stepper driver schematin next in power schematic

voltage regulator (10v, 5v, 3v3)
10 = for mosfet i want the lowest on resistance
5v, 3v3 = logic voltage

+i use robycon cap
+samsung cap
0_1551992445638_BOM_duwi mini_20190308035941.csv

the schema that i made from easy eda (i must remade schema from kicad to easy eda)
[0_1551992131920_duet mini wifi stepper driver](Uploading 100%)

@dc42 and i forget did the duet use 4 layer or 2 layer

@fma i dont use other other cad before mybe that the problem becouse kicad and eagle very similiar old schooll theme (i can use kicad (my sanity) the ui and how to use is very similiar and the people that kicad target is people that have use eagle (becouse eagle want paid subcription and many user left) and the kicad target are is not me
the thing that easy eda have
colorful, integration with lcsc,mouser,element14, etc(soo i know the price), and easy to use and can share pcb schematic in one app but sadly i cannot export and import from kicad and eagle becouse the app not support that