2 layers30.5 × 63 mm
Adbuino
akuker/adbuino
Arduino-based USB keyboard and Mouse to ADB adapter. Allows USB keyboards and mice to be used with vintage Macintosh computers.
75 parts60
2 layers69 × 41 mm
Powdy is an all-in-one power reader via USB-C! Just plug it in to your device, and watch as the power draw reading come onto the OLED screen.
- Size
- 69 × 41 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 23
- Nets
- 40
- Pads
- 121
- Tracks, vias
- 245, 33
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 25 May 2025
- Updated
- 5 Jun 2025
Overview
Power is an open-source printed circuit board by scooterthedev, from the scooterthedev/usbc-reader repository on GitHub. It is a 2-layer board of 69 × 41 mm with 23 parts on 40 nets, routed with 245 tracks and 33 vias.
It is built around the ATMEGA328P-AU and AMS1117-3.3. Its parts include 8 resistors, 6 capacitors, 3 ICs, 3 connectors and 1 crystal. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
2
ATMEGA328P-AU
TQFP-32(7x7)-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 23 2KB 32KB 8 Bit AVR Built-in FLASH TQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdPowdy
Powdy is an all-in-one power reader via USB-C! Just plug it in to your device, and watch as the power draw reading come onto the OLED screen. This device mostly uses one main component to read the power- The INA226, along with the MCU- the ATmega328P-A.
Software
The whole software is being written in Arduino (yes, I know....), and being flashed to the MCU via a USBtinyISP as a HEX file via SPI, and the 6 pin headers on-board.
BOM
| Item Name | Purpose in Project | Source | Item Price (incl. shipping + taxes) | Total Price |
|---|---|---|---|---|
| USB-C | What connects to the device to read the power output | JLC - C165948 | $0.84 | $0.84 |
| OLED | For displaying the reading | Amazon | $7.93 | $7.93 |
| Caps and Resistors x 14 | For everything | JLC | $0.29 | $0.29 |
| 2x03 Pin Header | For programming | Digikey - 61300411121 | $0.34 | $0.34 |
| INA226 | the actual IC to measure the power going through the USB-C port | JLC - C2653835 | $9.3 | $9.3 |
| AMS1117-3.3 | Voltage regulator to 3.3V from 5V for stuff like OLED and some INA226 pins | JLC - C6186 | $0.89 | $0.89 |
| ATmega328P-A | The Main MCU | JLC - C14877 | $11 | $11 |
| Crystal | For the MCU | Digi - ABM3-16.000MHZ-B2-T | $0.9 | $0.9 |
| USBtinyISP | The board to program the MCU via the 6 header pins | Amazon | $1 | $11 |
| Total - $43 Before Tax In Parts | ||||
| Total - $117 After Everything including assembly + pcb + tax and shipping |
Photos
Parts
23| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 4.7kΩ | Resistor_SMD:R_0603_1608Metric | R1, R2, R5, R6 |
| 2 | 10 µF | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 2 | 22 pF | Capacitor_SMD:C_0603_1608Metric | C3, C4 |
| 2 | 5.1kΩ | Resistor_SMD:R_0603_1608Metric | R3, R4 |
| 1 | 0.05 Ω | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | 0.1 µF | Capacitor_SMD:C_0603_1608Metric | C6 |
| 1 | 10kΩ | Resistor_SMD:R_0603_1608Metric | R9 |
| 1 | 1µF | Capacitor_SMD:C_0603_1608Metric | C5 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | ATmega328P-A | Package_QFP:TQFP-32_7x7mm_P0.8mm | U3 |
| 1 | AVR-ISP-6 | Connector:Tag-Connect_TC2030-IDC-NL_2x03_P1.27mm_Vertical | J2 |
| 1 | Crystal | Crystal:Crystal_SMD_0603-2Pin_6.0x3.5mm | Y1 |
| 1 | INA226 | Package_SO:VSSOP-10_3x3mm_P0.5mm | U1 |
| 1 | LOGO | LOGO | G*** |
| 1 | SSD1306 | Display:Adafruit_SSD1306 | Brd1 |
| 1 | Screw_Terminal_01x02 | TerminalBlock_4Ucon:TerminalBlock_4Ucon_1x02_P3.50mm_Horizontal | J3 |
| 1 | USB_C_Receptacle | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1 |
Questions
How big is the Power PCB?
It measures 69 × 41 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Power use?
23 parts, built around the ATMEGA328P-AU and AMS1117-3.3. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Power KiCad files?
From the scooterthedev/usbc-reader repository on GitHub, at the commit this page was made from: the board is power.kicad_pcb and its schematic power.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Power design in my own project?
Its repository states no licence, so its author keeps all rights: ask scooterthedev before reusing the design.
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