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CH341A Important 3.3v Voltage FIX - Motherboard BIOS Programmer 

Luumi
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30 окт 2024

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Комментарии : 38   
@christopherjackson2157
@christopherjackson2157 2 года назад
There's a version 1.6 of the ch341a where the voltage issue has been corrected (as of Feb 2022). But I see a lot of eBay listings for the new revision with pictures of the old one, so buyer beware. Always a fan of ur bios content. Thanks!
@LuumiJuhani
@LuumiJuhani 2 года назад
Great info, so thanks for the headup.
@intestinal47
@intestinal47 5 месяцев назад
Hi, excuse me for reviving such an old thread. I have to flash a W25Q32BV chip, that operates at 3.3V. I have no access to buy a 1.6+ version of the CH431A, but the CH341B version, will this version work without riks? Thanks
@pvb9964
@pvb9964 8 месяцев назад
Unnecessary modification....once connected to 3.3 v bios IC, the volts drop from approx 5 volts to approc 3.3 colts. Modding makes this unit unreliable
@xiv3r
@xiv3r Год назад
black ch341a has 3.3v and 5v voltage while blue ch341a has only 3.3v fix so no mods required
@intestinal47
@intestinal47 5 месяцев назад
Dear sir. I have to flash a W25Q32BV chip, that operates at 3.3V. If i buy the CH341B version, will it be safe for this chip? no mods to the programmer are recommendable? Thanks, i have no soldering skills.
@MACYNET323
@MACYNET323 2 года назад
Before flash Bios with soic8 you remove battery and jumper?
@LuumiJuhani
@LuumiJuhani 2 года назад
Yes you should do it.
@dau2z
@dau2z Год назад
i did this, but the data line measuring 3.1 volt, altough the ch341a vcc is 3.3 volt
@quenchtv5436
@quenchtv5436 Год назад
Same here i guess they sent us deffective product wtf
@BrennoMaturino1
@BrennoMaturino1 Год назад
That's actually normal, there is a small voltage drop, but you can use the programmer normally
@quenchtv5436
@quenchtv5436 Год назад
@@BrennoMaturino1 still cant fix my asus mobo im planning to buy the latest one but it's too expensive
@lenslens7379
@lenslens7379 8 месяцев назад
Try to put cap 1uF and 100nF at the output of regulator
@EpicLPer
@EpicLPer Год назад
Did this mod and somehow my CH341A made a "sizzling" sound for a few seconds, think something was shorted... it's dead now after a few reading attempts, tho already ordered a new and better programmer.
@SianaGearz
@SianaGearz 2 года назад
There's now a new PCB version which has 1.8V, it would be good to look at it. Most BIOS chips on MBs are nominally only 1.8V anyway and only accidentally 3.3V tolerant. By the way there's anecdotal experience of people mindlessly plopping the test clip in 3.3V mode onto 1.8V chips and they're fine, no heat no anything, like what? Colour me surprised, but apparently they are feisty little bois. That X79 has only a 64mbit one? I wonder where they dug that out, i thought 128mbit was common for the longest time. And 3.3V as well huh. Something to keep in mind that the pin source/sink current that CH341a can muster is RIDICULOUSLY low, like 200uA. These will be easily dissipated by ESD diodes on the target chip clamping the real pin voltage to VCC+0.5V, and you don't really need to expect long term damage to the target chip due to this. I'd be really more concerned for whether CH341 will survive that, it's a spectacularly wimpy chip. I understand that it's chip made for and under cost pressure, but it's basically made out of leftover snot. Exceeding VCC on the pins is however not particularly safe for CH341a, which is probably why they went this route of always feeding it 5V.
@MACYNET323
@MACYNET323 2 года назад
How recognize this version?
@kovacspis
@kovacspis 2 года назад
How was the X79-UD7? Did you use Ivy-E?
@LuumiJuhani
@LuumiJuhani 2 года назад
Not tested properly yet, gonna use only sandy-e.
@kovacspis
@kovacspis 2 года назад
Why sandy-e? What's the goal?
@LuumiJuhani
@LuumiJuhani 2 года назад
@@kovacspis 3930k + 3820. Add me back David!
@train4905
@train4905 Год назад
Awsome😊
@gmt-yt
@gmt-yt 2 года назад
Good to know, thanks!
@quenchtv5436
@quenchtv5436 Год назад
Hi can you pls help me what programmer you will recommend to flash bios chip MX25L3206EPI-12G This programmer is a trash i did this but still i get data line 3.1v i wanna buy other programmer
@pvb9964
@pvb9964 8 месяцев назад
it's now trash because you ruined it it doing the unnecessary modification
@quenchtv5436
@quenchtv5436 8 месяцев назад
@@pvb9964 can you explain it further? I tried a tutorial online but i didnt get 3.3 voltage 😔
@pvb9964
@pvb9964 8 месяцев назад
@@quenchtv5436 watch Sorin in this video "How to program a bios chip - CH341A programmer, no, you don't have to modify it"
@pvb9964
@pvb9964 8 месяцев назад
@@quenchtv5436 Watch " How to program a bios chip - CH341A programmer, no, you don't have to modify it" by Sorin , Electronics Repair School
@Hudsonkem
@Hudsonkem 6 месяцев назад
why you guys does not realise that there is a capacitor infront of the out put pin or the regulator that is connected with pin 9?
@neilmaass5007
@neilmaass5007 Месяц назад
There is actually nothing wrong with the programmer. If you look at those 5V pins with an Oscilloscope you will find it is actually pulsed waveforms sitting on those pins. The current on those pins are very low so it cannot damage your BIOS chip. Measuring the voltages while programming the chip you will find it dropped to 3,4V and those pins can accept volts up to 4.2V. I have programmed a few chips without any problems just as it is,out of the box. You can also watch this video which confirms what I have found. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-J8-Sh7DjiXw.html
@gustavoadolforubimontes3740
@gustavoadolforubimontes3740 2 месяца назад
lo hice y no me funciono lo deje cmo estaba y si me funciono puede que sea otro modelo pero es el mismo que tenes ai
@gymstrengthhakim8453
@gymstrengthhakim8453 Год назад
I have ch341a, i do this modification but it does not Work.
@pvb9964
@pvb9964 8 месяцев назад
Unnecessary modification....once connected to 3.3 v bios IC, the volts drop from approx 5 volts to approc 3.3 colts. Modding makes this unit unreliable
@taiiat0
@taiiat0 2 года назад
cheers.
@blueskies792
@blueskies792 Год назад
Two wires!
@XantheFIN
@XantheFIN 6 месяцев назад
*BAOS*
@jon123423
@jon123423 Месяц назад
Rubbish!
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