Simplest USB to Serial Converter To Replace PL2303 | PCB FROM PCBWAY.COM
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- čas přidán 2. 08. 2024
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Simple CH330N based USB-C to serial -converter will be my choice of USB-to-TTL converter in the future.
I have used PL2303 based USB to serial -converters for many years. At first they were very cheap and worked perfectly. These days, drivers that Windows installs automatically aren't working anymore. Fortunately installing older drivers has been decent workaround, but I would like to have a converter that is plug'n'play and...well, just works!
CH330N is cheap USB to UART -converter IC in small SOIC8 package and it only needs couple of small capacitors to work. I made small PCBs that have USB-C jack, CH330N and a pin header, essentially doing the same thing as PL2303 based boards used to do. With solderable jumpers I can configure the converter to have 3.3V or 5V VCC/IO.
0:00 PL2303, not so great anymore
0:55 PCBWAY.COM ad
1:31 Good parts of PL2303
1:50 CH330N
2:46 5V schematic
2:57 3.3V schematic
3:08 Schematic, 3.3V/5V
3:30 Switch or solder jumpers?
4:40 Conclusion
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Unfortunately I think CH330Ns are discontinued. Might have to switch to CH340N.
Thanks for the heads up! I wonder if WCH simply just renamed CH330N. It would make sesnse.... After all, it was basically just 8 pin version of CH340 series ICs. Initially the 8 pin CH340N didn't exist. It wasn't listed in datasheet version 2C, but for example in version 2G it exists.
Solder jumpers are a cheap/free way of adding configuration options to your PCBs.
I have used them to set precision reference voltage/current...use a small group of resistors, with connections between them, and to ground or plus, and you get precision setting, with no potentiometer noise or drift, using "normal precision" resistors...a bit of board space, but low cost, and good stability.
Why did I only NOW found your channel, and you have been around for ages!! Great channel, I like your content very much. Thank you.😉👍
Much appreciated!
funny thing...the minute i heard you speak..."Suomalainen!" appeared in my head... seitsemän vuotta salossa... at first, i missed the "a-dots" in seven...wait, it was kahdeksan vuotta...onko kesä hyvää...our friend said over 30C, everything too dry...nice to see you here.. kanadalainen, mutta melkein suomalinen 🇨🇦🦈🐻❄️
Yeah, those who know Finnish accent will recognize it immediately. We have had several sunny summer days, but rain would be nice for a change, especially for the nature.
Did you ever made something with the CH551G micro chips?
I have used them few times in small projects. Great microcontroller for simple projects where IO needs to be controlled over USB. SDCC package has several examples that are easy to modify to meet your own needs.
Is this going to be the way of the future? Destruction and obsolescence of perfectly operational physical hardware because "Windows stops supporting it"?
I think these chips have stopped working with latest drivers TWICE. First time it may have been due to differences in fake chips sold on Aliexpress and the genuine one, or so I have heard. It may or may not have been intentional bricking.
Second time the latest drivers started saying "Phased out since 2012. Please contact your supplier" in the device manager. That must be intentional, because driver recognizes the old version of the chip but doesn't allow it to work. Couldn't they just supply older drivers for those? Or maybe old and new chip have the same VID:PID, which makes it hard to provide different drivers for them.
Either way, I'm glad to switch to using these chips with lower MSRP and stop wondering if the chip I'm using is a fake and stops working at some point.
@@Hackvlog The 'bricking' by FTDI was absolutely intentional. EEVBlog covered it nicely, back in the day. I am not touching FTDI hardware anytime soon.