Search found 3 matches

by kirria
Wed Nov 22, 2017 1:26 am
Forum: General Hardware
Topic: Route my USB 2.0 (12MHz) signal on the bottom layer of a 4-layer PCB
Replies: 1
Views: 2167

Route my USB 2.0 (12MHz) signal on the bottom layer of a 4-layer PCB

I would like to route my USB 2.0 (12MHz) signal on the bottom layer of a 4-layer PCB. However, the edge-coupled microstrips would then be referenced to the power plane, not the ground plane. The signals are going to the USB pins of an STM32F105 microcontroller(datasheet: http://www.kynix.com/uploadf...
by kirria
Tue Apr 11, 2017 4:07 am
Forum: Arduino
Topic: Why should the usb cable connect to the arduino?
Replies: 0
Views: 2104

Why should the usb cable connect to the arduino?

I have a problem with the ESP8266 wifi shield and the Arduino Uno Rev 3 I have made it work successfully with either software or hardware serial. However, if I connect a 12 V power supply to the Arduino and remove the usb cable (connecting the arduino to the pc) the STAT led on the wifi shield just ...
by kirria
Tue Feb 14, 2017 2:54 am
Forum: General Hardware
Topic: Resistors selection and PCB layout of TPS7A3001
Replies: 0
Views: 737

Resistors selection and PCB layout of TPS7A3001

Hello, Recently I am trying to use TPS7A3001 for providing clean and stable +5 and -5 V power for my PCBs. I am aware that the output voltage is adjustable by changing the values of external resistors which is connected between the OUT pin and GND. After reading the datasheet, I have some questions:...