• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

I need help

Status
Not open for further replies.

alvamabel2018

New Member
thành ra lúc ăn nó, môi và lưỡi của bạn cũng sẽ thường bị nhiễm màu đỏ theo. tuy nhiên để đôi môi được đỏ lâu và đều khắp môi thì bạn ko nên chỉ ăn hoặc uống chúng.
Bạn lấy nước ép trong khoảng một trong những mẫu trái cây ấy, nhúng 1 loại tăm bông vào rồi thoa lên môi, để cho nước trái cây khô trùng hợp.
xem thêm:Phun môi giá bao nhiêu để ko bị hớ, môi lên màu tự nhiên?
như vậy bạn sẽ thuận tiện sở hữu được đôi môi đỏ ngẫu nhiên, kể cả sau một thời gian, màu sẽ bị nhạt đi chút nhưng vẫn sẽ sở hữu sắc môi hồng bỗng dưng.Bên cạnh việc tẩy tế bào chết cho làn môi thì công việc giữ ẩm cho đôi môi của bạn cũng là điều cấp thiết để môi mang màu sắc tự dưng phải chăng. Để giữ ẩm cho làn môi, ngay sau khi làm sạch tế bào chết bạn sở hữu thể dùng son dưỡng môi mang sẵn hoặc Anh chị có thể tiêu dùng những nguyên liệu sở hữu tác dụng dưỡng ẩm cho môi như dầu o liu,mật ong hay sữa..,Ngoài ra, bạn cũng với thể tự tạo cho mình son dưỡng môi bằng bí quyết hòa tan một muỗng mật ong mang 3 muỗng dầu dừa.Thêm vào một đôi giọt tinh dầu sở hữu vị hương mà bạn thích như bạc hà. Sau đấy bạn đổ hổ lốn trên vào 1 mẫu hũ. Đợi hẩu lốn đông cứng lại là bạn có thể tiêu dùng được rồi. Bạn với thể thực hành việc này 2-3 lần /tuần là được.
xem thêm:http://phunmayngocdung.com/phun-xam-moi-o-dau-dep-va-len-mau-tu-nhien-nhat/
Anh chị hãy chọn củ dền sở hữu màu đỏ thật đậm, rửa thật sạch rồi cắt thành hình vuông rồi ép lấy nước cốt. Sau đó trộn với dầu ô liu hoặc dầu dừa thành hẩu lốn. Cả nhà trâm nước củ dền mỗi tối trước khi đi ngủ sau lớp son dưỡng môi sau 1 tháng là môi khởi đầu hồng trở lại.
nguồn:phun môi màu hồng cam
 
Last edited:

dknguyen

Well-Known Member
Most Helpful Member
Do some tests for us:

Try running your code on USB power. Then on DC plug power. Then try reprogramming your board with only USB power. Then try reprogramming your board with DC plug power connected. What happens?

So as far as you can tell, everything still works but you can't re-program the processor? What power connections do you have (or don't have) plugged in when you try to program it? And what power connections do you have when running it normally?

The chip you circled is the voltage regulator, not a transistor. I ask about the power connections because perhaps you are using different power connections to program it (i.e. USB) and other power connections to run your code normally (maybe the DC barrel jack).

Knowing that the circled chip is a voltage regulator and not a transistor, could you explain one more time what you did when things went up in smoke? Because whenever you say transistor, I am not sure if you are talking about the circled component or the 22222.
 
Last edited:

crutschow

Well-Known Member
Most Helpful Member
Deleted
 

JonSea

Well-Known Member
Most Helpful Member
If the voltage regulator failed shorted, connecting the DC supply while the USB is connected may leadvto more smoke.

Looks like the LED was connected without a current-limiting resistor. When the transistor was turned on, the power supply was shorted.
 

dknguyen

Well-Known Member
Most Helpful Member
If the voltage regulator failed shorted, connecting the DC supply while the USB is connected may leadvto more smoke.

Looks like the LED was connected without a current-limiting resistor. When the transistor was turned on, the power supply was shorted.
https://www.arduino.cc/en/uploads/Main/arduino-uno-schematic.pdf
All the linear regulators on the board have have current and/or overtemperature that should have prevented the magic smoke from escaping?

The 22222 transistor is also in source follower mode so a current limiting resistor should not have been needed (at least at the collector or emitter). The OP also seems to have collected the emitter to an MCU pin rather than directly to the power supply.

Frankly, we need the OP to clear up what component the smoke came from. OP says transistor but circled the regulator in the photo, and according to the regulator there may be a transistor depending on the regulator he is talking about.

Give us the component label (i.e. U1, T2, Q1) of the component that the smoke came from.

OP really needs to clear up what "transistor" he is referring to (if he is indeed talking about a transistor at all and not the regulator) because he says he touched the base to ground and if he is referring to the 22222 transistor, then that should not have turned on the transistor on to damage anything.
 
Last edited:

DerStrom8

Super Moderator
Most Helpful Member
According to the attached schematic, it's an ON Semiconductor NCP1117ST50T3G 5V 1A voltage regulator. Unfortunately nobody seems to have these in stock at the moment, Mouser is expecting some in July though. I recommend removing the damaged one and checking to make sure there are no other shorts between 5V and GND, otherwise you'd just burn the replacement too.

arduino-uno-r3-schematic.png
 
Last edited:
Status
Not open for further replies.

Latest threads

EE World Online Articles

Loading
Top