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in a table format recommend vias sizes that i can use for my VDD3V3, my USB, and...
collinsemasi

collinsemasi

@copilot in a table format recommend vias sizes that i can use for my VDD3V3, my USB, and the other signal buses
1y

copilot

Certainly! When selecting via sizes for different purposes, consider the current capacity and signal integrity requirements of each net. Here are some general recommendations:

Table

NetVia TypeDrill Diameter (mm)Pad Diameter (mm)Application
VDD3V3Power Via0.3 to 0.50.6 to 1.0For carrying power with minimal resistance.
USBSignal/Ground Via0.25 to 0.30.5 to 0.7Maintain signal integrity for high-speed.
Signal BusesStandard Signal Via0.2 to 0.30.4 to 0.6For regular signal routing.
Notes:
  • VDD3V3: Use slightly larger vias to handle higher current loads with minimal voltage drop.
  • USB: For USB signals, aim to use vias that minimize parasitic inductance, preserving the high-speed signal quality.
  • Signal Buses: Standard via sizes generally work for signal buses unless dealing with very high-frequency signals where the impedance match is critical.
The exact sizes might also depend on the specific capabilities of your PCB manufacturer. Always double-check these values with your design rules or fabrication constraints.
1y
2
CAM_CLK
VDD_SPI
SPI_HOLD
BIAS_MIC3
BIAS_MIC1
SPI_HOLD
SPI_WP
BIAS_MIC4
DVP_Y6
VDD3V3
SPI_WP
VDD2V8
DVP_Y3
VDD3V3
DVP_Y5
DVP_Y9
DVP_Y4
DVP_Y7
BIAS_MIC2
DVP_Y8
MTMS
C39
Capacitance
0.1uF
BLUE
DEBUG INDICATOR
BIAS
MTCK
C37
Capacitance
TBD F
C40
Capacitance
0.1uF
MTDO
MTDI
C17
Capacitance
0.1uF
C36
Capacitance
TBD F
L2
Inductance
TBD H
Q1
Not Recommended for New Designs
R1
Resistance
100 Ω
U5
R8
Resistance
2.21kΩ
AN1
R6
Resistance
2.21kΩ
R7
Resistance
2.21kΩ
SW3
R12
Resistance
5.1kΩ
Status Blue LED
Line 1
Forward Current = 10mA
Line 2
Forward Voltage = 2.9V
Line 3
Max Reverse Current (@ VR = 5V) = 100uA
R9
Resistance
2.21kΩ
R18
Resistance
22 Ω
CAM1
U4

Biskuit AI 9150

The Biskuit pendant is a WiFi/BLE Enabled wearable AI Diary which captures Images and sounds periodically and creates an audio visual timeline of your day so that you don't forget anything.

Properties

Consumer Electronics

RoHS, REACH

1.8

-20 to 50

10000

hours

Battery

WiFi, Bluetooth

Button, Display

ohwr.org/project/cernohl/wikis/home

150hrs

Aluminum body

IP68

Microphone Array

IOS, WINDOWS, ANDROID

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Pricing & Availability

Distributor

Qty 1

Arrow

$3.42–$3.84

Digi-Key

$6.20–$6.58

LCSC

$9.72–$18.69

Mouser

$10.51

Verical

$0.69–$0.92

Controls