4 layers
Cm4 ipad display adapter
EvanKrall/cm4_ipad_display_adapter
Circuit that converts the video outputs of the Raspberry Pi CM4 to the DisplayPort and LVDS signals the iPad 1 wants.
16 parts6
4 layers36.8 × 38.1 mm
Cm4 ipad display adapter
EvanKrall/pipad60A PCB for putting a Raspberry Pi CM4 inside a 1st-generation iPad.
- Size
- 36.8 × 38.1 mm
- Copper layers
- 4
- Thickness
- 0.81 mm
- Parts
- 29
- Nets
- 80
- Pads
- 241
- Tracks, vias
- 752, 38
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 5 (file 20210126)
- Created
- 5 Apr 2021
- Updated
- 17 Sep 2023
Overview
Cm4 ipad display adapter is an open-source printed circuit board by EvanKrall, from the EvanKrall/pipad repository on GitHub. It is a 4-layer board of 36.8 × 38.1 mm with 29 parts on 80 nets, routed with 752 tracks and 38 vias.
It is built around the SN65DSI83TPAPRQ1 and MIC5504-1.8YM5-TR. Its parts include 15 capacitors, 5 resistors, 4 connectors, 3 ICs and 1 diode. It belongs with the computers and single-board computers and lEDs and displays boards and the Raspberry Pi (Linux) boards of this library.
Main components
2
SN65DSI83TPAPRQ1
HTQFP-64(10x10)-40℃~+105℃ 1.8V 4Gbps 77mA I2C、LVDS HTQFP-64(10x10) Interface - Specialized ROHSTexas InstrumentsInterface - Specialized
MIC5504-1.8YM5-TR
SOT-23-5-40℃~+125℃@(Tj) 1 1.8V 175uVrms 300mA 380mV@(300mA) 5.5V 55uA 60dB@(1kHz) Fixed Over Current Protection、Over Temperature Protection Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMicrochip TechnologyVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdPipad
In this project, I am building a replacement logic board around a Raspberry Pi CM4.
I have a project on Hackaday.io and this is the corresponding Github repository.
NOTE: Newest development takes place in cm4 branch
The Mission
The 2010 iPad is completely unsupported, and is almost useless. It will still run old apps, but almost all internet-connected apps are broken. Even browsing the web in Safari is difficult, since iOS 5 has out-of-date TLS CAs.
But still, it's a pretty good piece of hardware in many ways. If we were to replace the logic board, we could still use these parts:
- Case
- 25 watt-hour battery
- capacitive touchscreen digitizer
- 1024x768 LCD
- 2x wifi/bluetooth antennas
- mono speaker
- TRRS port
- microphone
- ambient light sensor
- four buttons (lock/unlock, volume up, volume down), one switch (rotation)
- The wifi/BT module
- 30-pin connector
Other repos connected to this
Parts
29| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 100nF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C2, C4, C5, C6, C7, C8, C9, C11, C12, C13 |
| 2 | 1uF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C14, C15 |
| 1 | 0.47uF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C16 |
| 1 | 1.3M | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R3 |
| 1 | 10k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R1 |
| 1 | 10uF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C1 |
| 1 | 143k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R5 |
| 1 | 1M | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R4 |
| 1 | 4.7uF | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C17 |
| 1 | 4.7uH | Inductor_SMD:L_0603_1608Metric_Pad1.05x0.95mm_HandSolder | L1 |
| 1 | 53.6k | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R2 |
| 1 | Conn_01x02_Female | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J4 |
| 1 | Conn_01x04_Female | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J5 |
| 1 | Conn_01x22_Female | Connector_FFC-FPC:Hirose_FH12-22S-0.5SH_1x22-1MP_P0.50mm_Horizontal | J1 |
| 1 | Conn_01x34_Female | footprints:20474-030E-11 | J3 |
| 1 | D_Schottky | footprints:PMEG4010EPK_315 | D1 |
| 1 | MIC5504-1.8YM5 | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | SN65DSI83TPAPRQ1 | footprints:SN65DSI83TPAPRQ1 | U1 |
| 1 | TPS61176RTER | footprints:TPS61176RTER | U3 |
Questions
How big is the Cm4 ipad display adapter PCB?
It measures 36.8 × 38.1 mm and has 4 copper layers, 0.81 mm thick.
What parts does the Cm4 ipad display adapter use?
29 parts, built around the SN65DSI83TPAPRQ1 and MIC5504-1.8YM5-TR. 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 Cm4 ipad display adapter KiCad files?
From the EvanKrall/pipad repository on GitHub, at the commit this page was made from: the board is cm4_ipad_display_adapter.kicad_pcb and its schematic als.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Cm4 ipad display adapter design in my own project?
Its repository states no licence, so its author keeps all rights: ask EvanKrall before reusing the design.
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