Electronics > Projects, Designs, and Technical Stuff
STM32F103 min system with USB-TTL converter?
bjdhjy888:
Thanks, guys. My bad.
If you saw my initial layout, you would be surprised how much worse it was. It was very very bad. I cannot even look at now. That's why I did appreciate your replies.
I'm gonna re-do the layout from scratch and improve my schematic, again! :palm:
Thanks again. Bless you, mariush!
;)
p.s.: Though I've been following Dave on YouTube, it wasn't until today that I noticed that his vlog has some videos on PCB layout. I just started to watch them. Hope I can improve my PCB layout skills.
Simon:
No coponent is in physics what it is labeled as and we are basically playing with physics at a higher abstracted layer. The higher you go in frequency the more heed you pay to actual physics.
No passive component is purely a resistor, capacitor or inductor. Every one is a tuned circuit with a dominant characteristic. All other components have R, C, & L in them too. Every pin of a chip has capacitance, gates of MOSFET's are capacitors, sure you can pick a bigger MOSFET with lower Rds_on that will make less heat when conducting, but now it will have more input capacitance and take longer to turn on and off which means making more heat....
thm_w:
--- Quote from: Kilrah on September 01, 2019, 08:58:07 am ---Being a beginner is perfectly fine. Being a beginner who doesn't listen to the good advice they received after asking for it, and going after those who take time to try and help them usually doesn't end well for them. That has nothing to do with being a beginner in the first place.
--- End quote ---
Sure, and he should be appreciative. But advice given should match, to some extent, the skill of the OP. If its the guys first board and you whip out a laundry list of mostly non-critical criticisms, its going to overwhelm or discourage them.
eg "acid traps" and such are really not a thing any more, a lot of PCB design advice is from times past when PCB manufacturing was not as well refined as it is these days. Some recommendations that used to be "good practice" have become obsolete, although some still have value in terms of clean layout/etc.
--- Quote from: bjdhjy888 on August 31, 2019, 01:23:50 am ---My next step is to connect an external MPU-6050 module with my board.
In order for the module to communicate with my board, I need to use two wires for an I2C connection between MPU-6050 and my STM32.
The thing is, there is no room around PB6 and PB7 of my STM32.
I will need to put two vias inside my STM32. Is this unprofessional? I tried to avoid putting vias inside any IC's.
Please let me know. Thanks!
--- End quote ---
Yes you can put via's under the IC, there is nothing wrong with this. Just keep it far from the pads (to avoid solder shorting where you cant see it), and not if the part in question has a metal pad in the middle (this STM32 does not).
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