All Questions
31
questions
0
votes
4
answers
2k
views
Running 3.5" Hard Drive off USB 3 (900mA / 5V)
I was having a discussion with someone about why 3.5" hard drive adapters don't exist that run solely off USB. Please forgive me but my electrical engineering knowledge is minimal and been a long ...
- 103
0
votes
1
answer
1k
views
How do you splice a micro USB cable to a USB cable?
I'm making a "heated vest" Christmas gift for my wife by adding heating elements to a "fashionable" vest. I've done this for others in the past:
Velcroed in this tiny power bank
...
- 35
0
votes
0
answers
229
views
USB Type-C powering from legacy sources
I'm new to USB Type-C and trying to design a USB-C powered device. After investing some time reading the specification and some application notes, I'm still having problems understanding the big ...
3
votes
1
answer
4k
views
Making my own Chromebook debug cable (SuzyQ / SuzyQable)
While trying to access the CR50 chip in my Dell Latitude 7410 Chromebook, I tried making my own Suzy-Q cable because no online store seems to have some in stock.
I bought some USB breakout boards, and ...
- 143
-2
votes
1
answer
76
views
Do I need to add a ground to this recycled appliance ac to usb converter? [closed]
I found a lamp someone had thrown out and took it apart for components. It had an AC to USB adapter. Originally it had a 3 prong plug and was connected internally to various components and a grounding ...
- 99
1
vote
1
answer
604
views
USB plug adaptation for Dremel 7750
So, I recently threw out a bag of random chargers I didn't think I was using anymore. Later I found that my Dremel charger was part of these. I did however save all the connectors and just threw out ...
- 13
0
votes
1
answer
261
views
USB-C to USB-A 3.0 and USB-C for charging 20V
What is the connections configuration that I should implement to output a usb-C and usb-A 3.0 from a usb-C input? The input will be from a docking station capable of supplying 20V to charge my laptop. ...
- 344
0
votes
1
answer
94
views
Separating power from data micro USB to HDMI
I have a camera which both draws power and sends its data through a battery pack to a custom monitor. The monitor also draws power as well as receives the camera data through the battery pack. (Both ...
34
votes
2
answers
8k
views
What is the reason for yellow tape on top of USB mini-B?
I have noticed that occasionally some USB mini-B connectors have what looks like a transparent yellow tape on their top.
It might be Kapton tape, but I am not sure.
As an example, please see the below ...
0
votes
1
answer
264
views
How does a USB-C to Lighting Adapter work / How to replace them? [closed]
So, I am fairly new here, and to be honest I have no clue if this is the right place to ask.
I am currently thinking about replacing a Lightning port with a USB-C port, just for power supply. At first ...
- 3
2
votes
1
answer
2k
views
MicroSD to USB adapter
My goal is to make a MicroSD to USB adapter myself.
With this question, I saw that I can use a USB2240 controller chip to connect my µSD card to my computer.
In ...
- 23
-1
votes
1
answer
151
views
What is happening when I apply 5V DC to the DC end of a 12V AC to DC adapter? [closed]
The question is in itself a little bit confusing but I will try my best.
So I have a normal 12 volt (1 amp) AC to DC wall charger, nothing fancy about it. I use that to power a fan, which works great ...
- 135
10
votes
1
answer
18k
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 ...
- 203
8
votes
1
answer
3k
views
How do USB to serial adapters work?
I'd like to know how a USB to serial adapter (such as the FTDI FT232RL chip) works.
The way I think it does is the following:
Picture a system composed of a MCU, a USB to serial adapter and the PC ...
- 83
0
votes
1
answer
319
views
Taking Quizbowl buzzers and connecting to a computer
Recently I Bought quizbowl buzzers from buzzersystems.com and the buzzers i received use an rca cable.
If you did not know basically, when you click a button, it sends a signal to a box which ...
