All Questions
10
questions
2
votes
1
answer
107
views
USB Type C - only for powering my board
I want to use a USB type C cable only to power my board.
My board requires 5V input and max of 2A load.
I read that by default, the USB Type C cable can give an output of 5V & 3A.
So, I am ...
- 1
0
votes
1
answer
65
views
Connected my keyboard to Apple 67W USB-C Power Adapter: Voltage Concerns [closed]
I recently had an experience with my keyboard (HHKB Professional Hybrid Type S) that I wanted to get some additional insights on.
Specifically, I accidentally connected my keyboard to a 67W Apple USB-...
- 13
1
vote
3
answers
330
views
Type-C as a source and sink
I am designing a circuit that consists of Type-C male and female connectors. The device will act as a bridge between the mobile and the charger. I connected the CC1 and CC2 to 5.1k resistors on both ...
- 11
1
vote
1
answer
2k
views
USB UFP and DFP - differences
How to understand or differentiate between a USB upstream-facing port and a downstream-facing port?
Just want to understand it to place the resistors on the CCx pins in case of using a Type-C ...
user220456
0
votes
1
answer
99
views
USB Powered modes
I was trying to understand USB and Ethernet interfaces and found this device and its associated hardware design checklist - Link.
On page 10, Section 9-2 of the hardware design checklist, they have a ...
user220456
2
votes
2
answers
159
views
How can a charger charge both a phone and a laptop?
I have seen questions asking about usage but that's not my point here. I regularly use my Macbook USB-C charger to charge my iPhone. As far as I know, the phone requires a much lower output voltage (...
- 123
2
votes
0
answers
180
views
Adding USB charging port to trimmer, question about voltage
I'm fairly unexperienced with electronics, but I'm currently working on what should be a relativly easy project, but I have a few questions and maybe you can help me. I recently found an old beard ...
- 21
1
vote
0
answers
169
views
5-20V VBUS sensing with 5V only IC
I am designing a board with a FT230 USB to UART IC. In battery powered applications, one of its GPIO can serve as a VBUS sensing pin.
However, the FT230X was designed for 5V applications, before the ...
- 118
0
votes
1
answer
399
views
USB-C PD, Voltage and Current of Power Adaptors [closed]
I have a rather basic question... but I don't want to take chances.
I have two MacBook Pros, one which ships with a 87W power unit, and the other a 96W power unit.
Now, I understand that a device ...
- 105
1
vote
1
answer
489
views
Why does the USB-C plug shell carry a voltage?
I purchased a Xiaomi laptop PRO computer, which uses a USB-C plug for its power input. I recently measured the plug's shell with a AC voltmeter, and found to my surprise a voltage between 90 to 100 ...
- 11