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Questions tagged [usb-c]

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0
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1answer
44 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?...
0
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1answer
39 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
35 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
32 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
votes
1answer
262 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 ...
2
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2answers
76 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
108 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
84 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
76 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
votes
2answers
331 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
26 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
votes
1answer
70 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
votes
1answer
98 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
votes
1answer
79 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
votes
1answer
81 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
43 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
31 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....
-1
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1answer
90 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
46 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
vote
1answer
45 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
162 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
38 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
votes
1answer
136 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
353 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
votes
1answer
381 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
votes
1answer
281 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 (...
1
vote
2answers
129 views

Can I charge my AC rechargeable hearing aid batteries via USB PD with converter?

I hope you'll be able to help. First of all this is a bit of a complex one that I'm struggling with. I wear hearing aids, both of which use removable, rechargeable batteries, charged only by a charger ...
0
votes
1answer
201 views

USB Cable Resistor Values [closed]

I am in the process of designing a fancy USB type c cable (paracord, colourful heat-shrink, coils etc) And I'm worried about resistor values, I don't want to blow my phones port or the charger. I ...
0
votes
0answers
136 views

Achieving 90R impedance for USB Type C on a four layer board

I have started routing the 90R controlled impedance tracks for the USB. I've got the information from the manufacturer to use a trace width of 0.22mm and trace spacing of 0.125mm to achieve 90R ...
0
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1answer
106 views

USB-C superspeed Signal pass through connection issue

The idea was to make a pass through super-speed signal connection (like a cable)between USB-C horizontal connector and USB-C vertical connector on a custom made PCB. where the device connects to the ...
0
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1answer
285 views

Splitting power from usb type c charging brick

I did a DIY a portable monitor from a salvaged laptop LCD screen using a controller board I ordered online. Managed to make it work with a power adapter and an HDMI cable. I want to use it with my ...
0
votes
1answer
42 views

ACM2012-900-2P filter can be used on USB 3.0 lines of a Type-C connector?

I have doubts that this CMF is recommended for USB3.0 due to his bandwidth. I am afraid it will filter the USB signal. Can someone explain better the SCCC21 and SDS21 characteristics from here? https:/...
0
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2answers
156 views

Datasheet / footprint for this weird USB-C connector?

I've got this SMD USB-C type connector I want to use: It has a single row of 12 pins along the back, presumably meaning the other 12 USB C pins are pre-connected internally. Neat. This also suggests ...
-1
votes
1answer
231 views

OTG + simultaneous charging with USB Type-C cable?

This video shows how to make it with a Micro USB. Is it possible to make the same thing with USB Type-C ? My phone has OTG host function. Thanks! http://youtube.com/watch?v=pH895umr0UA&t=8m43s
0
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1answer
198 views

How can I test the resistor on my USB connector?

I have purchased some USB-C connectors that I use to build my own cables with (I have separate "host" and "device" side connectors for various cable assemblies), and I was wondering how I might go ...
1
vote
1answer
79 views

USB Diff Pair used by 2 devices on PCB

My PMIC uses the DP/DN pair of USB type C to get the maximum current that it can draw to power up the circuit or charge the battery. The problem is that i don't have a hub and the signal from ...
1
vote
1answer
115 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 ...
1
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1answer
724 views

12v DC to USB type C

Considering that USB C can output up to 20 volts and 5 amps, what would be required to wire up a 12 volt battery to a usb type c female port? I want to charge my phone using my motorcycle's 12 volt ...
0
votes
1answer
347 views

USB-C UFP and DFP Not Working Properly with ONLY Samsung Mobile Phones

I have a UFP device (basically just a light) that I am trying to sink for power only. The "light" has a micro-B plug, which then plugs into a micro-B port on a PCB, that then includes a USB-C plug ...
0
votes
1answer
90 views

Use USB-C cable as multiples regular copper wires

Could it be possible to use a USB-C Cable to USB-C Cable with both end controlled by me, just for use as simple copper wires, without negotiation, etc... Because i would not be using the USB protocol. ...
3
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4answers
1k views

How to get 20 V from a USB-C charger?

I want to power my DIY stuff with a MacBook Pro USB C charger. The label on a charger says that it can provide three different power profiles: 20.2V - 4.3A 9V - 3A 5.2V - 2.4A There is a ton of ...
0
votes
1answer
179 views

Type-C Cable : Different between Active cable, Passive Cable, EMCA

Please anyone help me to clarify different btw Active cable, Passive cable, EMCA. Their definition seem difficult to understand. Additional, in USB-TypeC Specification from usb.org: ...
0
votes
1answer
209 views

Purpose of ICs in EMCA - Type-C

I can't find the purpose of IC ( which is power sourced by VConn) inside the EMCA. Source/Sink can communicate with EMCA via this IC. But what is exactly function of this IC in Power Delivery ? P/S: ...
1
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0answers
179 views

Magsafe to USB-C adapter

I would like to create an Magsafe 1 to USB C adapter to re-use my macbook magsafe charger on my usb-c macbook. I have these components below and already tried to connect both V+ and Ground with no ...
2
votes
1answer
5k views

Can I power 12v devices from USB-C? [closed]

First post, and I hope I'm in the right place. Long story short, I have some led strips that normally draw power from a car battery, or large AGM via battery clamps. Well, I'm tired of having to ...
3
votes
1answer
356 views

USB-C connectors only work on target side, not host side?

I wanted to turn a short USB-A-to-Micro USB/Lightning cable into one that has a USB-C plug on the host side (because I couldn't find such a thing for purchase). I chopped off the USB-A plug and ...
-1
votes
1answer
6k views

Using a usb-c laptop charger to charge a phone [closed]

I don't really know anything about electronics and I'm not sure if it's the right place to ask, but still. Is it OK to charge my phone with my laptop's charger? Here's info on the laptop charger: ...
0
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2answers
234 views

USB-C How to detect an Audio Accessory with Charge Through

Given the scenario in the USB Type-C Specification Figure A-2 "Example 3.5mm to USB Type-C Adapter Supporting 500mA Charge-Through".... How does the USB Type-C Receptacle know that a USB Type-C plug ...
6
votes
1answer
682 views

USB-C Power Delivery with a buck converter

Following on from my previous question: The project I'm designing requires a peak current of 5V @ 6A. The average current draw will be more like 2A. The reason I'm looking into USB-C is that I want ...
2
votes
2answers
289 views

Add USB-C Jack to USB Device

I have some inexpensive audio equipment that I am willing to experiment on. Trying to cut down on cables and I would like everything to be USB-C. I have a small midi keyboard and a small audio ...