ConnectBox HAT using RPi CM4
About the ConnectBox HAT using RPi CM4
ConnectBox HAT using RPi CM4 is an open source AVR/Arduino PCB design by ConnectBox, published on GitHub. It is a 4-layer board measuring 105 × 78 mm, with 130 components from 85 distinct parts.
Its main chip is the ATtiny88-AU, from the AVR/Arduino family. Other key parts include the AXP209, MT3608, MIC2019YM6, HC-R8812AF1 and TPD4EUSB30. By type, the board carries 39 capacitors, 35 resistors, 14 ICs, 8 connectors, 6 transistors and 6 test points.
It belongs with the dev boards & breakouts designs in this gallery.
From the project
Connectbox Circuit Design
This repo contains the schematic and KiCAD design files for the NEO-USB-HAT. This is a daugherboard to add an extra USB port and power input to a NanoPi NEO.
Main components on the ConnectBox HAT using RPi CM4
ConnectBox HAT using RPi CM4 bill of materials (BOM)
130 components, 85 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AXP209 X-Powers | UQFN-48-1EP_6x6mm_Pitch0.4mm_75 | U1 |
| 1 | MT3608 RT9742SNGV Richteck | SOT-23-5 | U2 |
| 1 | MIC2019YM6 AT24CS01-SSHM Microchip Technology | SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | HC-R8812AF1 TPD4EUSB30 TI | USON-10_2.5x1.0mm_P0.5mm | U4 |
| 2 | TPD4EUSB30 TI | USON-10_2.5x1.0mm_P0.5mm | U5, U9 |
| 2 | RT9742ANGJ5F Richtek | SOT-23-5 | U6, U11 |
| 1 | ATtiny88-AU Microchip Technology | TQFP-32_7x7mm_P0.8mm | U7 |
| 1 | FSUSB42MUX ON Semiconductor | MSOP-10_3x3mm_P0.5mm | U8 |
| 1 | USB2514B-I/M2 MicroChip | QFN-36-1EP_6x6mm_P0.5mm_EP3.7x3.7mm | U10 |
| 1 | HC-R8812AF1 | HC-R8812AU2-th-1 | U12 |
| 1 | DML10M8LDS-13 Diodes Inc | DML10M8LDS-13 | U13 |
| 1 | MAX1709ESE Maxim | SOP-16_3.9x9.9mm_P1.27mm | U14 |
| 6 | 8205A | TSSOP-8_4.4x3mm_P0.65mm | Q1, Q2, Q3, Q4, Q5, Q6 |
| 1 | 24MHz Qantek | Crystal_SMD_HC49-SD | Y1 |
| 1 | 690-019-298-412 Molex | EDAC 690-019-298-412 | J1 |
| 1 | Micro_SD_Card_Det Molex | SDCARD_MOLEX_503398-1892 | J2 |
| 1 | USB_OTG Amphenol | USB_Micro-B_EDAC_UCON00686 | J3 |
| 2 | USB_A On Shore Technology | USB_A | J4, J5 |
| 1 | MagJack-L829-1J1T-JM Bel Fuse Inc | MagJack L829-1J1T-JM | J6 |
| 1 | Conn_01x02_Female | PinHeader_1x02_P2.54mm_Vertical | J7 |
Show 65 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | PPPC081LFBN-RC Conn_01x04 Sullins Connector Solutions | PinHeader_1x04_P2.54mm_Vertical | P1 |
| 1 | 530470210 Molex PicoBlade 53047-0210 Molex | Molex PicoBlade 53047-0210 - (swapped pins) | BAT1 |
| 4 | Battery_Cell | PinHeader_1x02_P2.54mm_Vertical | BT1, BT2, BT3, BT4 |
| 1 | SolderJumper_2_Open | SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1 |
| 1 | ComputeModule4 Hirose | Raspberry-Pi-4-Compute-Module | Module1 |
| 2 | TL3305AF260QG SPST-PUSH E-Switch | SW-TL3305 | PB1, PB2 |
| 1 | Pwr_Gnd | TestPoint_THTPad_D1.5mm_Drill0.7mm | TP1 |
| 1 | AC_IN | TestPoint_THTPad_D1.5mm_Drill0.7mm | TP2 |
| 1 | Bat+ | TestPoint_THTPad_D1.5mm_Drill0.7mm | TP3 |
| 1 | IPS | TestPoint_THTPad_D1.5mm_Drill0.7mm | TP4 |
| 1 | IPS_Sw | TestPoint_THTPad_D1.5mm_Drill0.7mm | TP7 |
| 1 | 5V | TestPoint_THTPad_D1.5mm_Drill0.7mm | TP8 |
| 1 | LTST-C191KRKT Red Lite-On Inc. | LED_0603_1608Metric | LED1 |
| 1 | LTST-C191KFKT Amber Lite-On Inc. | LED_0603_1608Metric | LED2 |
| 1 | LTST-C191KFKT Green Lite-On Inc. | LED_0603_1608Metric | LED3 |
| 1 | NRVTS260ESFT1G MMBD914 ON Semiconductor | D_SOT-23_ANK | D1 |
| 1 | MMBD914LT1G LED Green ON Semiconductor | LED_0603_1608Metric | D2 |
| 3 | MMBD914 ON Semiconductor | D_SOT-23_ANK | D3, D4, D6 |
| 1 | NRVTS260ESFT1G ON Semiconductor | SOD-123FL | D5 |
| 1 | NR6028T4R7M 4.7 uH Taiyo Yuden | INDUCTOR_SMD_6x6-1 | L1 |
| 1 | NR6028T4R7M 1.0 uH Murata | L_Taiyo-Yuden_MD-5050 | L2 |
| 1 | 1.5 uH Taiyo Yuden | L_Taiyo-Yuden_NR-50xx | L3 |
| 1 | CL21A106MPFNNNE 22uF Samsung | C_0603_1608Metric | C1 |
| 4 | CL21A106MPFNNNE 10uF Samsung Electro-Mechanics | C_0603_1608Metric | C2, C3, C4, C5 |
| 1 | C0805C105K8PACTU 4.7uF KEMET | C_0603_1608Metric | C6 |
| 2 | C0805C226M8PAC7800 4.7uF KEMET | C_0603_1608Metric | C7, C8 |
| 2 | C0805C105K8PACTU 1uF KEMET | C_0603_1608Metric | C9, C10 |
| 2 | CL21B475KPFNNNE 0.1uf KEMET | C_0603_1608Metric | C11, C12 |
| 1 | CL21B475KPFNNNE 1uF KEMET | C_0603_1608Metric | C13 |
| 2 | C0805C226M8PAC7800 10uF Samsung Electro-Mechanics | C_0603_1608Metric | C14, C15 |
| 1 | C0805C226M8PAC7800 27pF Murata | C_0603_1608Metric | C17 |
| 1 | 27pF Murata | C_0603_1608Metric | C18 |
| 7 | 10uF Samsung Electro-Mechanics | C_0603_1608Metric | C19, C20, C27, C29, C31, C32, C33 |
| 7 | 0.1uf KEMET | C_0603_1608Metric | C21, C22, C23, C24, C25, C26, C38 |
| 1 | 100uF Nichicon | CP_Elec_6.3x4.5 | C28 |
| 2 | 22uF Samsung | C_0603_1608Metric | C30, C34 |
| 4 | 150uf Nippon Chemi-Con | CP_Elec_5x3 | C35, C36, C39, C40 |
| 1 | 0.22uf KEMET | C_0603_1608Metric | C37 |
| 1 | RC0805FR-07162R 0.03 ohm Panasonic Electronic Components | R_0805_2012Metric | R1 |
| 1 | ERJ-6CWFR030V 10K Yageo | R_0603_1608Metric | R2 |
| 1 | RC0805FR-071KL 100 Yageo | R_0603_1608Metric | R3 |
| 1 | RC0805FR-071K8L 200K Yageo | R_0603_1608Metric | R4 |
| 1 | RC0805FR-071KL 1.8K Yageo | R_0603_1608Metric | R5 |
| 1 | RC0805FR-07220KL 1k Yageo | R_0402_1005Metric | R6 |
| 1 | RC0805FR-07100RL 2.2K Yageo | R_0603_1608Metric | R7 |
| 2 | RC0805FR-0710KL 2.2K Yageo | R_0603_1608Metric | R8, R16 |
| 2 | RC0805FR-071KL 10K Yageo | R_0603_1608Metric | R9, R10 |
| 1 | RC0805FR-071KL 1K Yageo | R_0603_1608Metric | R11 |
| 1 | RC0805FR-072K2L 10K Yageo | R_0603_1608Metric | R12 |
| 1 | RC0805FR-071KL 12K Yageo | R_0603_1608Metric | R13 |
| 1 | 51K Yageo | R_0603_1608Metric | R14 |
| 2 | 1K Yageo | R_0603_1608Metric | R15, R32 |
| 1 | RC0805FR-0710KL nf Yageo | R_0603_1608Metric | R17 |
| 1 | RC0805FR-072K2L nf Yageo | R_0603_1608Metric | R18 |
| 1 | RC0805FR-072K2L 470 Yageo | R_0603_1608Metric | R19 |
| 1 | RC0805FR-07200KL 470 Yageo | R_0603_1608Metric | R20 |
| 1 | 12K Yageo | R_0603_1608Metric | R21 |
| 1 | RC0805FR-071KL 2.2K Yageo | R_0603_1608Metric | R22 |
| 2 | 2.2K Yageo | R_0603_1608Metric | R23, R33 |
| 3 | 36.0K Yageo | R_0603_1608Metric | R24, R25, R28 |
| 1 | RC0805FR-07200KL 36.0K Yageo | R_0603_1608Metric | R26 |
| 1 | RC0805FR-0727KL 12K Yageo | R_0603_1608Metric | R27 |
| 3 | 10K Yageo | R_0603_1608Metric | R29, R34, R35 |
| 1 | 220K Yageo | R_0603_1608Metric | R30 |
| 1 | 2.0 Yageo | R_0603_1608Metric | R31 |
ConnectBox HAT using RPi CM4 design files
The KiCad project lives in the ConnectBox/Circuit-Design repository on GitHub; these links point at the commit this page was built from.
ConnectBox HAT using RPi CM4: common questions
What microcontroller does the ConnectBox HAT using RPi CM4 use?
The ConnectBox HAT using RPi CM4 is built around the ATtiny88-AU, from the AVR/Arduino family.
How big is the ConnectBox HAT using RPi CM4?
The ConnectBox HAT using RPi CM4 measures 105 × 78 mm, has 4 copper layers and is 4.69 mm thick.
How many components are on the ConnectBox HAT using RPi CM4?
130 components, from 85 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the ConnectBox HAT using RPi CM4 design files?
From the ConnectBox/Circuit-Design repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the ConnectBox HAT using RPi CM4 design in my own project?
The repository has no license, so all rights stay with ConnectBox. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the ConnectBox HAT using RPi CM4 without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.
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