Questions tagged [usb-c]

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45 views

Is there a way to power a computer stick from my phone with OTG? [on hold]

I need a compute stick like the Intel compute stick with me on the go. The way I will access it is just by doing SSH. I need a way to power it up, either by power bank or by my own phone via OTG, ...
0
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0answers
16 views

Activate PSU with eGPU (PS_ON Signal Activation) [closed]

I have a Thunderbolt 3 eGPU that I'm moving from its factory enclosure to a larger rack mount chassis to support a larger PSU for my Radeon VII. As usual, the PSU requires the PS_ON pin grounding to ...
0
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1answer
77 views

Wiring USB 2.0 to USB C Receptacle

I have a keyboard that uses a USB 2.0 cable to connect to the computer. I would like to remove the current USB 2.0 cable and replace it with a USB C receptacle. The goal is to be able to connect the ...
1
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1answer
40 views

Does USB-A connector have the pins required for USB power delivery (PD)?

I have looked at various USB power delivery (PD) adapters that supply a certain number of watts and are powered by 230V mains voltage. Always, they seem to have either a USB-C port or a full USB-C ...
0
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1answer
53 views

Does USB power delivery support arbitrary voltages?

I'm looking for a USB power delivery power adapter to charge my Canon EOS RP camera via its USB-C port. Canon sells its own adapter for insane prices, and the Canon adapter is apparently nothing but a ...
3
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1answer
135 views

Why would a USB-C adapter have a pull-up resistor?

I'm talking about a USB type-C male to USB type-A female adapter, the ones you need to connect a USB flash drive to the latest MacBooks. According to USB-C specification, this sort of adapter needs a ...
4
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1answer
75 views

Can USB Type-C 2.0 upstream (device) connect its CC pins and share a pull-down?

Since USB Type-C cables have only a single CC wire for detecting orientation (Microchip USB Type-C diagram: can an upstream (device) connect its CC1 and CC2 pins and share a single pull-down resistor?...
2
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1answer
69 views

How to use USB-C cable with a charger

Ill try to be as brief as possible. TL;DR: How to use my 3A 5V USB-C charger to power a dumb device that needs 5V 3A to run. My goal: I want to have a nightstand, that can charge 3 devices at the ...
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0answers
37 views

wiring diagram for USB-C to USB-mini cable

I want to create a cable that is USB-C on one end (from a Macbook Pro) and mini-USB on the other (to an external keyboard). Does anyone have a wiring diagram that could help? I read the question ...
7
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2answers
159 views

USB-C Connector: How to route signals

I'm having trouble understanding how to route the signals out of the Molex 1054500101 Type-C USB connector - specifically the B1-B12 pins. The distance between row A and row B is only 0.5mm, too ...
2
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2answers
72 views

USB Routing: Switching layers during routing

I'm working on a standard 4 layer board that involves USB 3.0. I have to route the SS TX/RX pairs as well as D+/D- pairs across a 2.8" PCB. I have found multiple calculators that provide me the ...
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1answer
40 views

USB-C UFP CC configuration: What Rd resistor value i need to use to be able to draw up to 3A?

Basically I want to add usb-c ports to my projects so i can use them to draw power. From what i understand i need to put 2 5.1kOhm resistors between CC1/CC2 and ground. Would this allow the consumer ...
1
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1answer
23 views

Do all USB-C compatible devices have USB hubs inside of them?

Since the signals on the USB-C connector are mirrored on each side with the CC pins indicating the plug orientation, does this mean that all USB-C devices have USB hubs so they can use the right D+/D- ...
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0answers
53 views

USB-C splitter design

I am trying to design a female USB-C to micro-B male/USB-C male cable. I only need 5V 3A at the male ends. I had someone propose this design, which essentially terminates the CC lines at the female ...
2
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2answers
42 views

Which way does power flow on USB type-c if CC1 and CC2 are not connected?

I got my hands on some USB type-c Male connectors, but when I tore one apart I saw that there is no pin on CC1 or CC2 and thus no pull-up or pull-down. After doing some research I'm not sure I know if ...
0
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1answer
56 views

Battery charging over USB-C (using USB-PD?)

I'm designing my first PCB, a wireless Keypad/Macropad with a battery. I'm probably going to be using a 2Ah Li-Ion battery because there will be a lot of LEDs on it and I just want it to last longer ...
0
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1answer
57 views

Is a PD controller necessary if VBUS is always >5V?

I'm trying to implement a board that will use USB-C Power Delivery. We want to operate with 20V 5A input. If we know the source will always be at 20V, is it necessary to put a PD controller on the ...
1
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1answer
33 views

Can we convert two type of USB ports by simply re-mapping the pins?

So there's lots of different port (or plug) out there like USB type-c, micro USB etc. Where I'm curious to convert between those port is it just simply like re-mapping those pins to the correct ...
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3answers
102 views

USB Type C 3.1 PD to get DC20V output [duplicate]

I have a USB Type C notebook charger. I know it can supply 20V with 2.25A for my notebook. If I have a type-c breakout board, like this: https://www.ebay.com/itm/USB-3-1-Type-C-Female-to-Female-pass-...
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0answers
36 views

Power in USB C Cable

I'm trying to do a proof of concept using USB C where the Device 1 initially (upon plug in) receives power from Device 2 and powers on. Then Device 1 disconnects from the power coming from Device 2 ...
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1answer
46 views

Choosing usb-c earphones that are lossless? [closed]

I know the USB-C audio standard support multiple compression standards, some lossy, some lossless. Can i control this in software or hardware ? how can i choose earphones that will guarantee ...
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0answers
50 views

Adapt existing usb-2 otg device to usb-c but use usb-2 mode

there are number of articles out there, like this one: http://www.ti.com/lit/wp/slly017/slly017.pdf But I'm not super confident in my abilities here so I'm wondering if someone could proof my ...
0
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1answer
84 views

USB 2.0 cable to USB C output [closed]

I've got a Streamdeck that has a USB 2.0 out as a fixed cable. I've bought a USB C 2.0 board that I want to wire up so I don't have a fixed cable anymore. My issue is I don't know what the two black ...
1
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1answer
177 views

Can I cut off a USB C plug, and replace it with a USB C socket

I need a USB C (female) to USB 3.0 Micro B (male) cable. Unfortunately, I can only find a male - male cable. Is it possible to cut the USB C plug off, and solder the wires to something like this: Or ...
0
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1answer
61 views

USB-C - incorrect termination

The Wikipedia link quoted below refers to incorrect termination on USB-C cables. Please could you suggest a way (with basic equipment) to test a USB-C cable to see if the correct pullup has been used?...
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1answer
45 views

Current limit a bus-powered usb 3.1 hub

I'm currently designing a bus-powered usb 3.1 hub. It will use a USB-C for UFP and 3 USB-A downstream. The hub will only be acting as a sink. As of my understanding, since it may be connected to USB ...
0
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1answer
41 views

Thunderbolt 3 connecting to USB 3.1

I know that Thunderbolt 3 uses the USB Type-C port, and I know that you can plug a USB cable into a Thunderbolt port and it will function as USB or Thunderbolt depending on the peripheral. However, ...
2
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0answers
44 views

USB Type-C DRP Integrated Switch/Interface Chip

I would like to experiment with a power bank design with a single usb type-c port. The port should have dual role, source current for charging other devices as well as sink current for charging itself....
3
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1answer
327 views

USB C PD fast power role swap

I'm currently designing a device, which consists of a STM32 microcontroller with USB 2.0 support, USB 2.0 hub and few dimmable leds. STM is connected to the hub, along with few other devices. Hub is ...
3
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2answers
93 views

USB-C to 15V conversion

I need to be able to power a device that accepts 15V with a USB-C cable. The issue is not physical but the wiring. I know USB-C can deliver 15V. But how ? Do I simply need to wire the two wires to ...
1
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3answers
486 views

Direct connection of UART serial port to USB type-C

in my project I have a USB type-C 3.1 2nd Generation (24 pins), which should provide 5V to a charge battery/battery system. In addition, there is a uC powered at 3,3V where the maximum voltage on GPIO ...
0
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1answer
99 views

Stabilize circuit on 5V 2A

I have not yet build following circuit: Circuit in high performance needs 5V 1.7A (measured). I have source which is powerbank with 16 000 mAh. Outputting via ports: USB-C 5V/3A, USB-A 5V/3A, Micro-...
1
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1answer
107 views

Interpreting USB-C land pattern

I'm replacing USB Micro and USB B connectors on my PCBs for USB-C connectors, but only using USB 2.0. So I'm looking for a connector that isn't too complex to layout or hard to solder. I found this ...
2
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2answers
348 views

Component identification, between USB-C switch IC and connector

As the title really, can you identify this component? It's on a line connecting a USB-C switch IC (PI3USB30532) to the USB-C connector and I believe the line is for Display port functionality. How ...
0
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1answer
31 views

Replacing lightning connector with usb-c connector in lightning earphones [closed]

I have a lightning earphones, Sennheiser ambeo smart headset. https://en-us.sennheiser.com/finalstop The cables are yellowing, and I wanted to replace them, also I got tired of using this on my ...
2
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1answer
73 views

Low-Power over USB [closed]

I have a small custom 5V 2mA device which is powered over USB. To be specific, it will be powered over USB by connecting it to an Android smartphone or an iPhone. There is no data transfer. I ...
2
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1answer
137 views

Which pin of USB-C to use for analog signal?

I am working on a project which connects a microcontroller to an IR sensor device and decided to use a male-male USB C since I need 5 lines (V,GND,SCL,SDA,ADC). Which pin should I use for my single-...
0
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1answer
222 views

Problems wiring USB-C receptacle [closed]

(First, sorry for my English :_D) I'm doing a school project and I wanted to swap a male/plug USB-C to a USB-C female/receptacle. I thought it was just soldering the cables onto the board and it's ...
0
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1answer
118 views

USB C connector design and resistor placement for USB 2.0 data cable

I have a follow-up question to this one. I have a type C connector with 8 pins. No spec, type C female counterpart reveals G, Vcc, A2, A3, A6, A7. Remaining two pins do not respond to anything. G-Vcc ...
0
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2answers
49 views

What would happen if a charger tried to pull more current than a QC 3.0 source can output?

I've got this charger: https://store.dji.com/product/mavic-car-charger It takes 12.7 - 16V input from a car and outputs 13.05V at 6.1A (~80W) I want to utilize a USB-PD and / or USB-C QC 3.0 ...
0
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0answers
35 views

Need to boost 20vdc to 84vdc 90 watts . Is this a taller feat then a 60v boost circuit? going from usbc breakout board fairchild chipset

I've already made one that goes 60volt, but now have a device that needs 84 volts to the input of a BMS (battery management circuit). 90 watts -- OEM charger is 1.45 amps @84 volts. https://www....
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1answer
125 views

USB over RJ45 to USB C [closed]

I am working on an Arcade Stick/Fight Stick enclosure. Internally, the PCB (Brook UFB) runs USB over a standard Ethernet cable, to a Neutrik RJ45 passthrough. I typically then create an RJ45 to USB A ...
0
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1answer
75 views

USB C Spec Compliant way of splitting power

I'm trying to get a Y Splitter going on, where one of the sides is passthrough on the CC pins and the other side has a step down/buck converter that can take 5-20v input and always do 5v output. I ...
1
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1answer
59 views

Modifying USB 2.0 Hub to use an upstream Type C connector won't communicate Data

I have taken a cheap Amazon Basics USB 2.0 Hub and have started soldering wires on it with a USB C plug breakout I bought from Pololu I soldered the Vbus, Gnd, D+ and D- respectively from the USB C ...
3
votes
1answer
202 views

In usb C to audio jack systems, is the DAC in the dongle or in the host? [closed]

I'd like to design my usb-c audio preamp, but that would be possible only if the analog audio comes directly from the phone, so that my piece of hardware can take the power supply from the usb-c and ...
2
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0answers
41 views

USB-C Strange voltage bias detected on shield and unconnected pins interfering with signal

I'm having trouble figuring out why there is a 1.8 V bias on the shield and the unconnected pins of my USB-C connector. Some background... I am attempting to use USB-C connectors to connect two ICs ...
2
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1answer
172 views

USB-C / USB 3.0 alternate mode as low speed serial port

I want to make a device which can be connected either to a PC with an USB 2.0 connection or to another identical device and have a serial connection. This should be detected acutomatically and I want ...
1
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2answers
600 views

USB type-c power supply (up to 20V 5A) from DC source

I have a custom made 5s power bank (30 x 18650 cells) and I want to make a power supply to charge my laptop using this power bank. It's not a big deal to make a 5V charger because I just have to hard ...
0
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1answer
580 views

What voltage does a laptop provide over USB C?

I have read a bit already about USB C specification. One thing is not clear for me though. Please take a look at this picture: A device with profile from 1 to 5 can provide a higher voltage on the ...
2
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1answer
520 views

Replacing USB-A with USB-C fails [closed]

What I did, step by step: Cut off the USB-A cable from a device. (smart card reader) Cut a USB-C to USB-A cable in half. (cable came with a phone) Soldered the USB-C part (see step 2) to the device (...