OVHD Mainboard
About the OVHD Mainboard PCB
OVHD Mainboard is an open source AVR/Arduino PCB design by stefanofinetti, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 137 × 89 mm, with 123 components from 56 distinct parts.
Its main chip is the ATmega2560-16AU, from the AVR/Arduino family. Other key parts include the MIC29302WU, CH340G, AMS1117-3.3, TPS2115A and PCA9548APW. By type, the board carries 45 resistors, 35 capacitors, 19 connectors, 10 ICs, 5 transistors and 3 diodes.
From the project
Complete project for the Airbus A319/320/321/330 OverHead Panel
The v2 mainboard: the microcontroller, power, annunciator drivers and display multiplexer for the whole overhead. It sits on the floor of the lower-left case part and reaches the eight section boards through ribbons and backlight wires. The reasoning behind every choice is in docs/board-split.md.
PCB: 137 × 89 mm, 2 layers, 1.6 mm, GND poured on both sides. Fixing: four M3 holes, 4 mm in from the corners, for bosses with heat-set inserts in the reprinted case floor. Parts: 123. 65 of them are on the bottom. Status: routed with Freerouting. ERC, DRC (every warning on) and schematic parity are…
Main components on the OVHD Mainboard
OVHD Mainboard bill of materials (BOM)
123 components, 56 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MIC29302WU | TO-263-5_TabPin3 | U101 |
| 1 | CH340G | SOIC-16_3.9x9.9mm_P1.27mm | U201 |
| 1 | AMS1117-3.3 | SOT-223-3_TabPin2 | U202 |
| 1 | TPS2115A | TSSOP-8_4.4x3mm_P0.65mm | U203 |
| 1 | ATmega2560-16AU | TQFP-100_14x14mm_P0.5mm | U301 |
| 1 | PCA9548APW | TSSOP-24_4.4x7.8mm_P0.65mm | U401 |
| 4 | TLC5927IDWR | DW24-M | U501, U502, U503, U504 |
| 2 | AO3401A | SOT-23 | Q501, Q503 |
| 2 | BS170 | TO-92_Inline | Q502, Q504 |
| 1 | IRLIZ44N | TO-220F-3_Horizontal_TabDown | Q601 |
| 1 | 12MHz | Crystal_SMD_EuroQuartz_MQ-4Pin_7.0x5.0mm_HandSoldering | Y201 |
| 1 | 16MHz | Crystal_SMD_EuroQuartz_MQ-4Pin_7.0x5.0mm_HandSoldering | Y301 |
| 1 | 9V IN | TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J101 |
| 1 | BootLoader | PinHeader_1x06_P2.54mm_Vertical | J201 |
| 1 | ADIRS backlight | TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal | J601 |
| 1 | FUEL backlight | TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal | J602 |
| 1 | ELEC backlight | TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal | J603 |
| 1 | GPWS backlight | TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal | J604 |
| 1 | AIRCOND backlight | TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal | J605 |
| 1 | EXTLT backlight | TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal | J606 |
Show 36 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | APU backlight | TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal | J607 |
| 1 | SIGNS backlight | TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal | J608 |
| 1 | ADIRS ribbon | IDC-Header_2x10_P2.54mm_Vertical | J701 |
| 1 | FUEL ribbon | IDC-Header_2x13_P2.54mm_Vertical | J702 |
| 1 | ELEC ribbon | IDC-Header_2x10_P2.54mm_Vertical | J703 |
| 1 | GPWS ribbon | IDC-Header_2x07_P2.54mm_Vertical | J704 |
| 1 | AIRCOND ribbon | IDC-Header_2x08_P2.54mm_Vertical | J705 |
| 1 | EXTLT ribbon | IDC-Header_2x07_P2.54mm_Vertical | J706 |
| 1 | APU ribbon | IDC-Header_2x05_P2.54mm_Vertical | J707 |
| 1 | SIGNS ribbon | IDC-Header_2x08_P2.54mm_Vertical | J708 |
| 1 | USB_B | USB_B_OST_USB-B1HSxx_Horizontal | P201 |
| 2 | MF-RHT200 | Fuse_Bourns_MF-RHT200 | F101, F102 |
| 1 | Power Selector | PinHeader_1x03_P2.54mm_Vertical | JP201 |
| 1 | I2C ADDR | SW_DIP_SPSTx03_Slide_9.78x9.8mm_W7.62mm_P2.54mm | SW401 |
| 1 | 1N5822 | D_DO-201AD_P15.24mm_Horizontal | D101 |
| 1 | SMBJ12CA | D_SMB_Handsoldering | D102 |
| 1 | PWR | LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D201 |
| 1 | 470uF 25V | CP_Radial_D10.0mm_P5.00mm | C101 |
| 20 | 100nF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C102, C104, C201, C203, C205, C206, C208, C210 +12 |
| 1 | 10uF 25V | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C103 |
| 1 | 100uF 10V | CP_Radial_D6.3mm_P2.50mm | C105 |
| 3 | 10uF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C106, C505, C506 |
| 5 | 22pF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C202, C204, C307, C308, C309 |
| 2 | 100uF | C_Elec_6.3x7.7 | C207, C209 |
| 1 | 220uF | C_Elec_6.3x7.7 | C213 |
| 1 | 10uF | CP_Elec_4x5.4 | C305 |
| 1 | 3.6K | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R101 |
| 1 | 1.2K | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R102 |
| 1 | 220 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R201 |
| 16 | 1K | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R202, R203, R501, R502, R503, R504, R511, R512 +8 |
| 1 | 1.5K | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R204 |
| 4 | 100K | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R205, R206, R523, R526 |
| 1 | 620 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R207 |
| 8 | 10K | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R301, R401, R410, R411, R412, R521, R524, R602 |
| 9 | 4.7K | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R402, R403, R404, R405, R406, R407, R408, R409 +1 |
| 3 | 100 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R522, R525, R601 |
OVHD Mainboard design files
The KiCad project lives in the stefanofinetti/MF_OverHead_Panel repository on GitHub; these links point at the commit this page was built from.
OVHD Mainboard: common questions
What microcontroller does the OVHD Mainboard use?
The OVHD Mainboard is built around the ATmega2560-16AU, from the AVR/Arduino family.
How big is the OVHD Mainboard PCB?
The OVHD Mainboard measures 137 × 89 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the OVHD Mainboard?
123 components, from 56 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 OVHD Mainboard design files?
From the stefanofinetti/MF_OverHead_Panel 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 OVHD Mainboard design in my own project?
Yes, under the terms of its GPL-3.0 license, which stefanofinetti chose for the repository.
Can I test firmware for the OVHD Mainboard 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.
More boards in MF_OverHead_Panel
AVR/ArduinoOverHead v1
313 × 206 mm345 parts4LGPL-3.05
EXTLT section board
159.5 × 79.5 mm57 parts2LGPL-3.05
SIGNS section board
108.5 × 79.5 mm47 parts2LGPL-3.05
FUEL section board
177.5 × 40 mm44 parts2LGPL-3.05
ADIRS section board
132.5 × 81.5 mm35 parts2LGPL-3.05
AIRCOND section board
150.5 × 39 mm34 parts2LGPL-3.05
ELEC section board
177.5 × 39.5 mm27 parts2LGPL-3.05
GPWS section board
159.5 × 39 mm26 parts2LGPL-3.05
APU section board
39 × 79.5 mm16 parts2LGPL-3.05
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