# Dockit Till Display

## Description

USB\-powered till\-counter QR and NFC display using an RP2040 Pico\-derived core and power circuit, ST25DV64KC tag, and directly soldered ER\-TFTM1\.54\-1 display module\. Prototype target: approximately 54 mm square PCB for a case no larger than 60 × 60 mm and under 15 mm thick\.

## Project Details

- **Owner:** ethansharpe
- **Created:** 10/10/2026
- **Last Updated:** 10/10/2026
- **Visibility:** Public

## Key Components

### D1 — [USBLC6\-2SC6](https://flux.ai/vasy_skral/usblc6-2sc6~g1b.md)

- Manufacturer Part Number: USBLC6\-2SC6
- Functional Group: IO J1 USB\-C
- Symbol Style: parametric\-v1
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: Protection
- Manufacturer Name: STMicroelectronics
- Datasheet URL: https://www\.st\.com/content/ccc/resource/technical/document/datasheet/06/1d/48/9c/6c/20/4a/b2/CD00050750\.pdf/files/CD00050750\.pdf/jcr:content/translations/en\.CD00050750\.pdf
- Role: Protection
- LCSC Part Number: C7519
- Role Details: USB2 data\-line ESD near connector

**Pins:**
- GND [pin 2]
- I/O1 [pin 6]
- I/O1 [pin 1]
- I/O2 [pin 3]
- I/O2 [pin 4]
- VBUS [pin 5]

### D2 — [MBR120VLSFT1G](https://flux.ai/lcsc/mbr120vlsft1g~ljs.md)

- Functional Group: POWER U2 Pico Buck Boost
- Manufacturer Part Number: MBR120VLSFT1G
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2410010333\_onsemi\-MBR120VLSFT1G\_C223608\.pdf
- Role: Rectification
- Role Details: Reference USB power path
- Manufacturer Name: onsemi\(安森美\)
- Part Type: Schottky Barrier Diodes \(SBD\)
- JLCPCB Part Class: Extended Part
- LCSC Part Number: C223608
- Package or Case Code: SOD\-123F\_L2\.8\-W1\.8\-LS3\.7\-RD
- Product Info Url: https://lcsc\.com/product\-detail/Schottky\-Barrier\-Diodes\-SBD\_ON\-Semicon\_MBR120VLSFT1G\_ON\-Semicon\-ON\-MBR120VLSFT1G\_C223608\.html

**Pins:**
- A [pin 2]
- K [pin 1]

### DS1 — ER\-TFTM1\.54\-1

- Exclude from Pick & Place: true
- Exclude from PCB: false
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/user\-uploaded/0a7147ff57f3f32a1fde218cc78336a85ff3e99806f642e6c641a67097075a1a\.pdf
- Exclude from Pick & Place: true
- Manufacturer Name: EastRising
- Functional Group: IO DS1 QR Display
- Mount: Solder
- Role: Signal Generation
- Role Details: Schematic verified working8\-pin mapping; mating footprint BLOCKED: header cross\-section/drill tolerances and outline registration missing; do not fabricate
- Manufacturer Part Number: ER\-TFTM1\.54\-1

**Pins:**
- BLK [pin 8]
- CS [pin 7]
- DC [pin 6]
- GND [pin 1]
- RES [pin 5]
- SCL [pin 3]
- SDA [pin 4]
- VCC [pin 2]

### F1 — [1206L050/15YR](https://flux.ai/jecstronic/1206l05015yr~ad2.md)

- Manufacturer Name: Littelfuse Inc\.
- Functional Group: POWER U2 Pico Buck Boost
- Manufacturer Part Number: 1206L050/15YR
- Role Details: 500mA20C hold350mA60C; provisional input\<=200mA; validate actual firmware load and hot enclosure
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2304140030\_Littelfuse\-1206L050\-15YR\_C151162\.pdf
- Role: Protection
- Part Type: Fuse
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- P1 [pin 1]
- P2 [pin 2]

### J1 — [TYPE\-C 16PIN 2MD](https://flux.ai/thor1878/type-c-16pin-2md~s6.md)

- Role: Signal Generation
- LCSC Part Number: C165948
- Part Type: USB Connectors
- Product Info Url: https://lcsc\.com/product\-detail/USB\-Type\-C\_Korean\-Hroparts\-Elec\-TYPE\-C\-31\-M\-12\_C165948\.html
- Manufacturer Part Number: TYPE\-C\-31\-M\-12
- Manufacturer Name: 韩国韩荣
- JLCPCB Part Class: Extended Part
- Role Details: USB2 device interface
- Datasheet URL: https://www\.lcsc\.com/datasheet/lcsc\_datasheet\_2410010003\_Korean\-Hroparts\-Elec\-TYPE\-C\-31\-M\-12\_C165948\.pdf
- Functional Group: IO J1 USB\-C
- Package or Case Code: USB\-C\_SMD\-TYPE\-C\-31\-M\-12

**Pins:**
- CC1 [pin A5]
- CC2 [pin B5]
- DN1 [pin A7]
- DN2 [pin B7]
- DP1 [pin A6]
- DP2 [pin B6]
- GND [pin B1]
- GND [pin B12]
- GND [pin A12]
- GND [pin A1]
- SBU1 [pin A8]
- SBU2 [pin B8]
- SH [pin 0]
- SH [pin 0]
- SH [pin 0]
- SH [pin 0]
- VBUS [pin A4]
- VBUS [pin B4]
- VBUS [pin B9]
- VBUS [pin A9]

### LED1 — [APTD1608CGCK](https://flux.ai/silicon-yard/aptd1608cgck~ur.md)

- Functional Group: MCU U1 Pico Core
- Role: Signal Generation
- Role Details: Green status LED GP25 active high
- Part Type: LED
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/user\-uploaded/f068c3c9d37b7f4862d4305da7361a3de2eaffd55dcf1fd1e0b7a2af67fb0e16\.pdf
- Manufacturer Part Number: APTD1608CGCK
- Manufacturer Name: Kingbright
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- A [pin 2]
- K [pin 1]

### Q1 — [DMG1012T](https://flux.ai/vasy_skral/dmg1012t~cm4.md)

- Functional Group: POWER U2 Pico Buck Boost
- Manufacturer Part Number: DMG1012T
- Role Details: Pico ADC3 series isolation FET G1=3V3 S2=ADC3 D3=VSYS/3; corrected source datasheet
- Role: Isolation
- Part Type: Transistor
- Manufacturer Name: Diodes Incorporated
- License: https://creativecommons\.org/licenses/by/4\.0/
- Datasheet URL: https://www\.diodes\.com/assets/Datasheets/DMG1012T\.pdf

**Pins:**
- D [pin 3]
- G [pin 1]
- S [pin 2]

### TP7 — [Generic Testpoint](https://flux.ai/jharwinbarrozo/generic-testpoint~esx.md)

- Functional Group: MCU U1 Pico Core
- Testpoint Size: 1\.5
- Role: Signal Generation
- Part Type: Test Point
- Role Details: BOOTSEL: bridge TP7 to adjacent GND while resetting; bottom access deferred placement

**Pins:**
- P1 [pin 1]

### TP8 — [Generic Testpoint](https://flux.ai/jharwinbarrozo/generic-testpoint~esx.md)

- Testpoint Size: 1\.5
- Part Type: Test Point
- Functional Group: MCU U1 Pico Core
- Role: Signal Generation
- Role Details: RESET: bridge TP8 to adjacent GND momentarily; bottom access deferred placement

**Pins:**
- P1 [pin 1]

### U1 — [RP2040](https://flux.ai/vasy_skral/rp2040~kqt.md)

- Datasheet URL: https://datasheets\.raspberrypi\.com/rp2040/rp2040\-datasheet\.pdf
- License: https://creativecommons\.org/licenses/by/4\.0/
- Role Details: Pico\-derived reference core; not a mounted module
- Symbol Style: Parametric
- Functional Group: MCU U1 Pico Core
- Manufacturer Part Number: RP2040
- Role: Main Controller
- Manufacturer Name: Raspberry Pi
- Part Type: Microcontroller

**Pins:**
- ADC\_AVDD [pin 43]
- DVDD [pin 50]
- DVDD [pin 23]
- GND [pin 57]
- GPIO0 [pin 2]
- GPIO1 [pin 3]
- GPIO10 [pin 13]
- GPIO11 [pin 14]
- GPIO12 [pin 15]
- GPIO13 [pin 16]
- GPIO14 [pin 17]
- GPIO15 [pin 18]
- GPIO16 [pin 27]
- GPIO17 [pin 28]
- GPIO18 [pin 29]
- GPIO19 [pin 30]
- GPIO2 [pin 4]
- GPIO20 [pin 31]
- GPIO21 [pin 32]
- GPIO22 [pin 34]
- GPIO23 [pin 35]
- GPIO24 [pin 36]
- GPIO25 [pin 37]
- GPIO26/ADC0 [pin 38]
- GPIO27/ADC1 [pin 39]
- GPIO28/ADC2 [pin 40]
- GPIO29/ADC3 [pin 41]
- GPIO3 [pin 5]
- GPIO4 [pin 6]
- GPIO5 [pin 7]
- GPIO6 [pin 8]
- GPIO7 [pin 9]
- GPIO8 [pin 11]
- GPIO9 [pin 12]
- IOVDD [pin 10]
- IOVDD [pin 49]
- IOVDD [pin 33]
- IOVDD [pin 1]
- IOVDD [pin 22]
- IOVDD [pin 42]
- QSPI\_CSN [pin 56]
- QSPI\_SCLK [pin 52]
- QSPI\_SD0 [pin 53]
- QSPI\_SD1 [pin 55]
- QSPI\_SD2 [pin 54]
- QSPI\_SD3 [pin 51]
- RUN [pin 26]
- SWCLK [pin 24]
- SWD [pin 25]
- TESTEN [pin 19]
- USB\_DM [pin 46]
- USB\_DP [pin 47]
- USB\_VDD [pin 48]
- VREG\_VIN [pin 44]
- VREG\_VOUT [pin 45]
- XIN [pin 20]
- XOUT [pin 21]

### U2 — [RT6150B\-33GQW](https://flux.ai/vasy_skral/rt6150b-33gqw~ng1.md)

- Functional Group: POWER U2 Pico Buck Boost
- Role: Power Conversion
- Part Type: Integrated Circuit
- Datasheet URL: https://www\.components\-store\.is/datasheets/3b/RT6150B\-33GQW\.pdf
- Manufacturer Part Number: RT6150B\-33GQW
- Role Details: Official Pico RT6150B\-33 reference topology; provisional200mA3V3 load envelope; fixed FB to3V3
- Manufacturer Name: Richtek USA Inc\.

**Pins:**
- EN [pin 6]
- FB [pin 10]
- GND [pin 3]
- GND [pin 11]
- GND [pin 9]
- LX1 [pin 4]
- LX2 [pin 2]
- PS [pin 7]
- VIN [pin 5]
- VINA [pin 8]
- VOUT [pin 1]

### U3 — ST25DV64KC\-IE6S3

- Manufacturer Name: STMicroelectronics
- Datasheet URL: https://www\.st\.com/resource/en/datasheet/st25dv04kc\.pdf
- Manufacturer Part Number: ST25DV64KC\-IE6S3
- Role: Modulation / Demodulation
- Role Details: SO8N verified package; no LPD; RF coil unvalidated
- Package or Case Code: SO8N
- Functional Group: RF U3 NFC Tag

**Pins:**
- AC0 [pin 2]
- AC1 [pin 3]
- GPO [pin 7]
- SCL [pin 6]
- SDA [pin 5]
- V\_EH [pin 1]
- VCC [pin 8]
- VSS [pin 4]

### U4 — [W25Q16JVUXIQ](https://flux.ai/lcsc/w25q16jvuxiq~9aq5.md)

- Symbol Style: parametric\-v1
- Manufacturer Name: WINBOND\(华邦\)
- Part Type: NOR FLASH
- Role: Logic\-level Shifting
- Frequency: 133MHz
- Supply Voltage: 1\.65 to 3\.6V
- Datasheet URL: https://stm32\-base\.org/assets/pdf/devices/W25Q16JV\.pdf
- Operating Temperature: \-40 \~ \+85°C
- License: https://creativecommons\.org/licenses/by/4\.0/
- Functional Group: MCU U1 Pico Core
- Package or Case Code: USON\-8\_L3\.0\-W2\.0\-P0\.50\-BL\-EP
- JLCPCB Part Class: Extended Part
- LCSC Part Number: C2843335
- Manufacturer Part Number: W25Q16JVUXIQ
- Role Details: 2MB Pico reference UX flash; SS unavailable in library; exposed pad NC follows Pico drawing, UX vendor clarification still open

**Pins:**
- \~\{CS\} [pin 1]
- CLK [pin 6]
- DI\(IO0\) [pin 5]
- DO\(IO1\) [pin 2]
- EP [pin 9]
- GND [pin 4]
- HOLD\#orRESET\#\(IO3\) [pin 7]
- VCC [pin 8]
- WP\#\(IO2\) [pin 3]

### Y1 — [ABM8\-272\-T3](https://flux.ai/cherepanyadima/abm8-272-t3.md)

- Manufacturer Part Number: ABM8\-272\-T3
- Role: Timing
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/user\-uploaded/abcc29c0156577dc07e713211d7690f701eead215bfdc93b0a8eb05501727ce2\.pdf
- Functional Group: MCU U1 Pico Core
- Symbol Style: parametric\-v1
- Part Type: Crystals and Oscillators
- Role Details: RP2040 12MHz crystal
- Mount: Surface Mount
- Manufacturer Name: Abracon

**Pins:**
- CRYSTAL\_1 [pin 1]
- CRYSTAL\_2 [pin 3]
- GND\_1 [pin 2]
- GND\_2 [pin 4]

*The full schematic, PCB layout, bill of materials, and interactive design are available at [https://flux\.ai/ethansharpe/dockit\-till\-display\~ra](https://flux.ai/ethansharpe/dockit-till-display~ra).*

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*Generated from [https://flux\.ai/ethansharpe/dockit\-till\-display\~ra](https://flux.ai/ethansharpe/dockit-till-display~ra)*