International shipping fees have been doubled by China Post, citing a sharp increase in demand of air freight traffic.
Fused USB to UART adapter This is yet another USB to UART adapter, or is it? The 2nd revision of my previous USB to UART adapter, it is better than ever. What's new in M180v3 The missing pin indic...Read More…
This is yet another USB to UART adapter, or is it? The 2nd revision of my previous USB to UART adapter, it is better than ever.
AMS1117-3.3regulator is removed after experiments revealed a way to make the internal regulator inside
CH340Gchipset, plug and play on Windows 7+, OS X and Linux, and immune to either FTDIgate or Prolific fake chip ban.
This project is created out of my own necessity: I had a few dodgy
PL2303-based USB to UART modules, and the recent Prolific driver update and FTDIgate killed them. However the one of my friends'
MCS-51 development board did not suffer from this plague of drivers disabling devices, and it is based on this
I bought a few of those
CH340G chips (which are an order of magnitude or two cheaper than both
PL2303 by the way) and initial breadboard testing was a great success, with one problem: the internal 3.3V regulator is a little bit problematic. This issue is tamed in the otherwise ill-fated
M180v2 PCB so this
M180v3 inherited this part of the circuit.
I did have one mishap with the breadboard though: I was being a fool and connected a chip in reverse, shorting out the power rails on the USB port. The short circuit current draw immediately upset my MacBook's USB port and caused it to be shut down. (Thanks Apple for the superior protection circuitry, should this happened while it is connected to my years-old Lenovo desktop it will definitely let the magic smoke out of my chip and probably take out the computer's motherboard too) I decided to make sure whenever USB power is used on my further projects it is definitely fused.
During this test while minding other projects, I snapped the Micro-USB jack on my Arduino Leonardo clone, took the traces with it and damaged the board beyond repair. A sad me had to take out my hot air gun and disassemble the Leonardo just to recover the parts, and swear not to use those easily damaged jacks on my projects ever, especially those jacks that will subject to lots of wear and tear like USB.
Here comes my design, a USB to UART adapter based on the
CH340G chipset, with the same SparkFun pinout, an extra-durable through-hole USB Type A plug, and a fused power rail.
There exists a
M180v2 revision after the original
M180 sold out, but it was ultimately scrapped.
M180v2 PCB have all the features this
M180v3 have, but instead of a through hole USB Type A plug soldered onto the PCB, a Type A plug was designed directly onto the PCB - that is, a card edge connector that should mate with a USB Type A socket - but this design was not reliable - not even with any kind of help I can think of.
You can hack this board for your own purposes!
I am Max, a college student major in computer engineering and dabbles in electronics engineering. This is one of my just-for-fun spare time projects.
This board is hand assembled by myself. Made in Shanghai with love, it will not be your one-hang-low Shenzhen crap.
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China Post: Registered Air Mail Petit Paquet
Kevin | Nov. 24, 2017
Jennifer | Oct. 20, 2015
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I am Max, a college student major in computer engineering and dabbles in electronics engineering.
Some products are built to order. All products Made in Shanghai with love.