CH341 Programmer 3.3V Fix | Voltlog #318

Hey volt i want you to know that volts doesn't kill components but the Amps kill it. So voltage doesn't matter and then when you connect the is decrease to 3.3 volt then the others pin 1.8 volt so the Ch341A was good programma

I did the same thing and mine outputs 1.9v I don't know why, maybe is it because i use a super thin copper wire? Also just to clarify did you let those copper wire to touch the side ground? Or it is elevated?

Did anyone check if WHEN a Bios chip ect is being erased, programmed ect, what the V on those data lines at that time is? Maybe the program tells the chip to lower voltage to 3.3v?

Apparently the 5V data lines dont carry any current so ..shouldnt hurt your 3.3V device however the mod cant hurt unless..... Can that Main chip on the CH341 get damaged if you feed it 3.3 instead of 5V at pin 28? Anybody done this and used it many times with no problems or a hot chip?

Is it possible, can I flash BIOS with the help of my mobile ?

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The question is : the ic can run with 3,3volt instead of 5v ?
Maby we can add a diodes on the outputs to reduce voltage.

Please I want to know after modifying it to 3.3volt will it still read 5 volt bios ic

This video has been very helpful. Thanks!

Useless mod btw.. when u insert the chip it will switch to 3.3 instantly also only 3 pins are 5 the rest are 3.3 already and u can verify that with ur multimeter

Great explanation, thank you😊

Can someone post a link to the software! I need to unlock my car radio

there is no issue putting a 3.3v chip onto this, even at 5 volts. The amperage is too low to damage any 3.3v chips. It's literally just a dumb rumor

What are those yellow data lines really for?

Wrong! The data lines are 3.3V when using the device. The voltage on the data lines WITHOUT connection is about 5V but as soon as you connect it to a chip and start communicating the voltage in fact IS 3.3V. So the modification is not only stupid it is also totally useless and even harmfull!

current cant burn anything without amps 5. v pin steps down under load to 3.3 v and therefore no need to modify no engineer fault design just bad reputations on net

Finally, got this mod over the line - doesn't look too bad. Enameled wire was a bit thick and awkward as before.

i did this mode, but used Solder Mask instead of kapton tape.

Very good job 👏 👍 👌

My ch341a
The red light does not turn on
The computer does not recognize it
Does he have a solution please?

Very Helpful

Every time great work

Hello! Best to cut the track you showed. Then you have to put a jumper on +3.3V and 5V. This is the most elegant and easy solution!

Thanks a lot. Made my day!

Thank you for this! I'll do this first thing when I get mine!

Does the 1.8v adaptor still work after 3.3v moding?

Hello, After this process when I connect to the bios chip it get unknown device. I had to solder back all. It is not working from 3.2V.

i did this, but the data line measuring 3.1 volt, altough the ch341a vcc is 3.3 volt

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no there is not as soon you start read rhite de voltage drop and besite that ad 0.07 micro amps you cant burn chips i donr untherstand as a electrician you do not know this

Unnecessary work. Nothing wrong with this programmer.

What is the voltage in data lines when the bios is just running in a PC? I'm wondering if this mod is really necessary. Used this programmer today unmodified on a MX25L6445E chip, worked fine.

:D 😃

What is the point of this tutorial? I have the same programmer and I haven't modified it at all. To rewrite the memories, I use adapters and it's ok (with jumper set to 1-2) What you don't say is that: jumper on 2-3 is for the ISP interface. I use it successfully as USBisp and in Arduino IDE.

Will it still work on 5v?

hi, is this programmer works on W25Q256xxx ic's?

Does this mean that I don’t need the 3v adapter?

By the way it is not easy. Maybe easy only for somebody skilled and having proger wires/glues.

Great vid, but daaaamn it. I bought it to fix my monitor IC205 chip. Now I see I have even worse problem of messing witch CH341 mods. F... sake!!!!

Thanks for the video. I was hoping this would solve my issue. Problem is, now the CH341 chip gets very hot while connected. Also the status led (opposite side of the board power led) doesn't come on now. This is without the bios chip connected. Is the CH341 fine? I double checked the connections and they are correct according to the video. I'm at a loss here 🙁

It gives also 5v

Great video! One word of advice to anyone trying this fix: Be VERY careful when lifting up the pin that is later bridged using the additional wire. When I tried to solder the wire onto the pin I lifted before, it broke off. It is likely that I damaged it already when lifting it up, but as a result it was impossible to solder any wire onto the chip and the whole thing is now toast. Thankfully, these things are cheap, so I'll just order another one, but better to avoid this happening in the first place.

i used mine with no mods...it worked perfectly at 5v! i had no problems writing spi-s and atmega chips! i have a word...if it is not broken don't fix it!

I checked mine (connect to a cellphone charger), all yellow pin are 5v (mios, mosi, clk, cs) GND is 0 and the 3.3v have 3.3v i dont get what the problem with that? why they need to have 3.3v?
Pin 1-2-5-6 have 5v and 3-7-8 with 3.3v only pin4 0v on the 25xx side and the 24xx side pin 1-2-3-4-7 are at 0v, pin8 3.3v and pin5-6 5v

I just was watching a vid on how to read 93/95xx chip using a mod to get 5v on pin8 for the 25xx , but was thinking on get the 5v from the yellow pin of 5v (from the side), what will happen if I mod this to get perma 3.3v? will affect the 5v yellow pin?

It works. Thank you :)