2 layers22.5 × 110.8 mm
2 layers63 × 34.5 mm
My version of an LCD Backpack with some unique features
- Size
- 63 × 34.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 54
- Nets
- 57
- Pads
- 223
- Tracks, vias
- 537, 194
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 5 Oct 2026
- Updated
- 5 Oct 2026
Overview
E1201 is an open-source printed circuit board by Electro707, from the Electro707/p1200_lcd_backpack repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 63 × 34.5 mm with 54 parts on 57 nets, routed with 537 tracks and 194 vias.
It is built around the TPS61222DCK, LM2776DBV and TCA9517ADGK, with the TXU0202DCU, TXU0304PW and MMBF170 among its other parts. Its parts include 14 resistors, 10 capacitors, 8 connectors, 6 ICs and 3 diodes. It belongs with the lEDs and displays boards and the PIC boards of this library.
Main components
7
TPS61222DCK
SC-70-6(SOT-363)-40℃~+125℃@(TJ) 1 200mA 5V 700mV~5.5V Boost Boost Built-in Fixed Yes SC-70-6(SOT-363) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
LM2776DBV
SOT-23-6-40℃~+85℃ -5.5V~-2.7V 2.5Ω 2.7V~5.5V 200mA 200uA 2MHz 90% Inverted Support SOT-23-6 Charge Pumps ROHSTexas InstrumentsCharge Pumps
TCA9517ADGK
TSSOP8Level-Translating I2C Bus RepeaterTexas InstrumentsUncategorised
TXU0202DCU
VSSOP-8-40℃~+125℃ 1 1.08V~5.5V 1.08V~5.5V 12mA 12mA 2 200Mbps Bidirectional Level translator Output enable high-impedance、Integrated pull-up resistor SPI、JTAG、UART Tri-State VSSOP-8 Translators, Level Shifters ROHSTexas InstrumentsTranslators, Level Shifters
TXU0304PW
TSSOP-14-40℃~+125℃ 1 1.08V~5.5V 1.08V~5.5V 200Mbps 4 Level translator Power-off protection、Output enable high-impedance、Integrated pull-up resistor Tri-State Unidirectional TSSOP-14 Translators, Level Shifters ROHSTexas InstrumentsTranslators, Level Shifters
MMBF170
SOT-23-55℃~+150℃ 1 N-channel 11pF 2.1V 2.2Ω@10V 200mA 22pF 2pF 300mW 60V SOT-23 MOSFETs ROHSDiodes IncorporatedMOSFETs
ESDA14V2SC5
SOT-23-5-40℃~+125℃ 100pF 12V 14.2V 14A@8/20us 300W 35V 5uA ESD Four channels IEC 61000-4-2 SOT-23-5 ESD and Surge Protection (TVS/ESD) ROHSSTMicroelectronicsESD And Surge Protection (TVS/ESD)
README
README.mdP1200 - LCB Backpack
WIP
Image of board on an LCD during development
This project is for a generic LCD backpack, similar to the many ones out there, with some distinct features that lead me to build my own:
- Negative voltage for the LCD Bias
- This was the biggest reason I made this project, as I had an older LCD that wouldn't work unless the LCD is biased to -2v. This is OK as most LCDs can be biased to -9v below VCC, I think?
- Both 5v and 3.3v power and data compatibility
- UART, SPI, and I2C protocols
- The ability to offload some functionality to this backpack, such as animations on the LCD
Project Structure:
- E1201: The KiCAD PCB files
- F1202: The firmware folder
- Release: All locked in files
PCB Jumper and Notes
TODO: this section
PCB Errata
The ERRATA's for the latest revision PCB can be found in ERRATA.md
Firmware
The firmware for this project is targeted towards the MCU on board (PIC16F18155).
To use the project, open it up in MPLAB IDE (v6.35 used), with PIC-AS 4.00 (comes with XC8) and device pack PIC16F1xxxx_DFP==1.31.465 (other version should be OK, noted for repeatability).
The project is written in assembly. Why? Why not? This was mostly for my learning of writing an entire firmware in bare assembly and getting familiar with the PIC architecture. I found it fun.
More info on the firmware, including the communication protocol, can be found in F1202/README.md
License
This project is licensed under GPLv3**
** This excludes the files in E1201/SparkFun-Qwiic.pretty, as they came from the Sparkfun
Parts
54| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R4, R5, R8, R9 |
| 4 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C4, C5, C6 |
| 4 | 5.1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R10, R11 |
| 3 | 510 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R12, R13, R14 |
| 3 | MMBF170 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3 |
| 2 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C7 |
| 2 | 2.2uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C8, C10 |
| 2 | Conn_01x04_Socket | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J2, J3 |
| 2 | ESDA14V2SC5 | Package_TO_SOT_SMD:SOT-23-5 | D1, D2 |
| 2 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2 |
| 2 | TestPoint | TestPoint:TestPoint_Pad_1.5x1.5mm | TP1, TP2 |
| 1 | 100pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1 |
| 1 | 10k | Potentiometer_SMD:Potentiometer_Bourns_3214X_Vertical | RV1 |
| 1 | 180k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R7 |
| 1 | 1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C9 |
| 1 | 20k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6 |
| 1 | 4.7uH | Inductor_SMD:L_1210_3225Metric | L1 |
| 1 | 500mA | Fuse:Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder | F1 |
| 1 | Conn_01x06_Socket | Connector_PinSocket_2.54mm:PinSocket_1x06_P2.54mm_Vertical | J4 |
| 1 | Conn_01x18 | Connector_PinSocket_2.54mm:PinSocket_1x18_P2.54mm_Vertical | J8 |
| 1 | Conn_02x08_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x08_P2.54mm_Vertical | J7 |
| 1 | FerriteBead | Inductor_SMD:L_0805_2012Metric_Pad1.05x1.20mm_HandSolder | FB1 |
| 1 | ICSP | Connector:Tag-Connect_TC2030-IDC-NL_2x03_P1.27mm_Vertical | J6 |
| 1 | Jumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1 |
| 1 | LM2776 | Package_TO_SOT_SMD:SOT-23-6 | U6 |
| 1 | PIC16F18154-xSP | Package_SO:SSOP-28_5.3x10.2mm_P0.65mm | U5 |
| 1 | QWIIC | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J5 |
| 1 | SMF5V0A | Diode_SMD:D_SMF | D3 |
| 1 | SW_Push | Button_Switch_SMD:SW_Push_1P1T_NO_CK_KMR2 | SW1 |
| 1 | Screw_Terminal_01x02 | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | J1 |
| 1 | TCA9517ADGK | Package_SO:VSSOP-8_3x3mm_P0.65mm | U3 |
| 1 | TPS61222DCK | Package_TO_SOT_SMD:Texas_R-PDSO-G6 | U4 |
| 1 | TXU0202DCU | Package_SO:VSSOP-8_2.3x2mm_P0.5mm | U2 |
| 1 | TXU0304PW | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U1 |
Questions
How big is the E1201 PCB?
It measures 63 × 34.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the E1201 use?
54 parts, built around the TPS61222DCK, LM2776DBV, TCA9517ADGK and TXU0202DCU. 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 E1201 KiCad files?
From the Electro707/p1200_lcd_backpack repository on GitHub, at the commit this page was made from: the board is E1201/E1201.kicad_pcb and its schematic E1201/E1201.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the E1201 design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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