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STD Xiao Level Up Board
Xiao Level Up Board
License
CC BY-NC-SA 3.0
License: CC BY-NC-SA 3.0- 0
Update time：
2024-07-15 12:58:48
Creation time：
2024-06-28 02:46:30
Description
Description
A Xiao form factor board for optional level shifting with the use a jumper.
.I have three uses for this board:
- If I want to use UART serial communication with a 5V board I need to level shift for the signals and power to avoid hurting the Xiao with its 3V3 pins
- There are some 5V only i2c devices such as the Seeed Vision AI sensor v2 (you can attach the Xiao directly to the board to get around this but my projects usually use multiple sensors so I prefer attaching it via a cable)
- There are some actuators that require 5V like the Seeed Water Atomization module
In the past I took care of this by assembling an inline level shifter. It works well but I prefer simplicity with enclosures and it makes things a bit more difficult as each DIY board has slightly different dimensions.
I've added an article detailing the board and included some test related code as part of it.
Design Drawing
Design Drawing
schematic diagram
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| ID | Name | Designator | Footprint | Quantity | Resistance (Ohms) | |
|---|---|---|---|---|---|---|
| 1 | 100nF | C2,C4 | C0805 | 2 | AC0805KKX7R0BB104 | |
| 2 | HY2.0-4P | I2C,SERIAL | CONN-SMD_4P-P2.00_HY2.0-4P | 2 | HY2.0-4P | |
| 3 | I2C Voltage | I2C_LVL | HDR-SMD_3P-P2.54-V-M-LS4.8_R1 | 1 | X6511WVS-03H-C60D48-R1 | |
| 4 | BSS138_C400505 | Q1,Q2,Q4,Q5 | SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR | 4 | BSS138_C400505 | |
| 5 | 4.7kΩ | R1,R3,R4,R6,R10,R12,R13,R15 | R0805 | 8 | RMC08054.7K1%N | |
| 6 | 220Ω | R2,R5,R11,R14 | R0805 | 4 | RC0805FR-07220RL | |
| 7 | Serial Voltage | SERIAL_LVL | HDR-SMD_3P-P2.54-V-M-LS4.8_R1 | 1 | X6511WVS-03H-C60D48-R1 | |
| 8 | Xiao | U1 | SEEEDUINO_XIAO | 1 | SEEEDUINO XIAO | |
| 9 | PIN HEADER 1X7PIN 2.54MM 7P OK | U2,U3 | PIN HEADER 1X7PIN 2.54MM 7P | 2 | PIN HEADER 1X7PIN 2.54MM 7P OK |
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