CH341a v1.6 Review, No More Volt Mods! - LFC#297

I couldn't figure out Aliexpress Affiliate stuff so here's a basic link ^^;

Chapters:
00:00 - Intro / Original CH341a
02:12 - What's in the packet
05:23 - v1.6 Volt Select Test
07:40 - Preparing a ROM chip
11:00 - Using NeoProgrammer
17:32 - Conclusion

[insertintrohere]

The CH341a doesn't supply 5v to the data lines. So no need to mod it.

If you multimeter it with no draw, it will show 4.7v, but once connected to the chip it will drop to 3.4v. Which is well within spec.

Plus current is more important when you talk about burning chips.

[QuentinStephens]

I remember erasing EPROMs with UV light in the mid 80s and programming them over a serial link. Maybe they were as large as 4KB. Things have changed a lot.

[ivolol]

I challenge you to find a 3.3V chip that you can burn with the older programmer. milliamp limits won't let it overload them.

[michaelmeux]

Watched a review on the original programmer you showed that had the mod on it. The guy measuring the voltage going through and the current was so low it wasn't an issue.

[matrix]

Always make sure to do at least 2 reads and compare using a program like HxD before you overwrite your chip. Neoprogrammer, and most other programmers, don't verify reads in any way so you can't rely on a single read. A bad connection that causes a bad read wont cause any errors and you will end up with an unusable backup.

[icommandoi]

The volt mod is unnecessary and a lot of people get that wrong and blindly spread that misinformation and apply the mod without actually testing the Voltage on the pins directly. Even at 5V when you connect a BIOS and it requires 3.3V you'll find it reads 3.2 ~3.4 on the BIOS pins. No mod necessary.

[pldaniels]

Looks like it's worth buying just for the adapter PCBs, of which one looks like it should support the USON (0.5mm pitch) footprint which is used a lot with Macbooks, especially the USB-C models for the thunderbolt ROM storage for each pair of CD32xx chips. Was going to design/fab my own but this would seem to be a simpler option ( and pick up some other interesting ones too I see ).

[jon]

you should have made 2 readings and check both files! before modifying the file.

[jonskitch]

Higher amps damages the chip not voltage. These reading are mere micro-amps. The mod was useless but having a green spare programmer is a good recommendation.

[krs]

voltage mod is not needed, 5v to the data lines are okay because it don't put more than 1mah in these lines, electronics repair school explained this

[David_Ladd]

Great video.
Thank you for sharing!

I have two CH341A v1.7 programmers on order and can't wait to put them in my service tool bags. :)

[SiETechNotebookReparatur]

If someone knows how to 3d print and make a template, they can make a nice cover for it. And make the template free :) For the old one are several templates also accessible.

[filenotfound__]

Whats up with the IR sensor on the programmer?

[clj]

your past volt mod & reprogamming videos on this tool saved me from having to buy a new motherboard, thanks =)

[ovalwingnut]

25 points awarded for a stellar iron tip and condition. It's amazing how often you see folks (teaching) with irons that look like they have been keep in BBQ pits.. Feel free to take the weekend off. You deserve it.

[josipcuca-zentil]

My original programmer worked well without any modification. Bullshit..

[cdhaag]

I'm pretty sure the included DIP socket is so you can solder the pins in straight.

[JA-pkjq]

I need help. I have tried over and over to reprogram the bios chip on a Surface Pro 4. It uses a winbond W25Q128FVPIQ. I tried attaching the ribbon to the chip on the board. I bought digital chips The Flash directly but they don't have that model ship anymore they don't make it they have a substitute it's the w25 q128 jvp IQ. I tried a Windows computer and I've tried Android I've tried as programmer and Neo along with others it's never automatically detecting the chip. And when it says it's writing it never works on the verification. I believe the issue at some point it has to do with the status registers. But I'm not sure I don't know what to do I need help please thank you

[stanleydsouza]

All of these support involves repairs thus reuse of Gadgets, perhaps making long uses of all innovations, recycling does not helps Global warming concerns, right here people like you Sir helps saves this beautiful Earth, Beautiful lives..God Almighty Bless you all

[wimmeke]

omg you dont need to voltmod this device put a chip on it and take your multimeter its all fine de chip do wat it need to do