2 layers117.6 × 112.5 mm
Panel
theQuetzalcoatl/avr-dev
A self made and designed embedded development board with several peripherals/devices to use. On top of that is an embedded kernel with several device drivers, forming an OS.
91 partsGPL-3.0
2 layers117.6 × 112.5 mm
Panel.bak
theQuetzalcoatl/avr-devA self made and designed embedded development board with several peripherals/devices to use. On top of that is an embedded kernel with several device drivers, forming an OS.
- Size
- 117.6 × 112.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 92
- Nets
- 101
- Pads
- 287
- Tracks, vias
- 691, 58
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 26 Apr 2020
- Updated
- 2 Jan 2026
Overview
Panel.bak is an open-source printed circuit board by theQuetzalcoatl, from the theQuetzalcoatl/avr-dev repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 117.6 × 112.5 mm with 92 parts on 101 nets, routed with 691 tracks and 58 vias.
It is built around the ATMEGA128-16AU and BC807. Its parts include 27 resistors, 25 connectors, 13 capacitors, 7 diodes and 4 transistors. It belongs with the microcontroller boards boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
2
ATMEGA128-16AU
TQFP-64(14x14)-40℃~+85℃ 10bit 128KB 16MHz 4.5V~5.5V 4KB 4KB 53 8 Bit AVR Built-in FLASH TQFP-64(14x14) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
BC807
SOT-23-65℃~+150℃ 1 PNP 100 100nA 345mW 45V 500mA 5V 700mV 80MHz PNP SOT-23 Bipolar (BJT) ROHSNexperiaBipolar (BJT)
README
README.mdavr-dev
A self made and designed embedded development board with several peripherals/devices to use. On top of that is an embedded kernel with several device drivers, forming an OS.
The project aims to develop a suitable SW architecture and a corresponding HW development board, which can be the foundation of learning and experimentation.
Hardware:
- LCD
- DAC
- Buzzer
- LEDs & buttons
- Keypad
- UART (potentially USB)
- Temperature sensing
- Light sensing
- Capacitive touch sensing
- Voltage/angle sensing
- Rotary encoder
Software:
- A primitive, embedded OS
- Device drivers for HAL
- Application
Parts
92| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | Conn_01x01 | Mounting_Holes:MountingHole_2.5mm | J19, J23, J28, J29, J30, J31 |
| 5 | 10nF | Capacitors_SMD:C_1206_HandSoldering | C10, C11, C12, C15, C17 |
| 5 | 270 | Resistors_SMD:R_1206_HandSoldering | R1, R6, R7, R8, R9 |
| 4 | 100nF | Capacitors_SMD:C_1206_HandSoldering | C2, C5, C9, C16 |
| 4 | 12 | Resistors_SMD:R_1206_HandSoldering | R5, R19, R21, R30 |
| 4 | Conn_01x01 | Mounting_Holes:MountingHole_3.5mm | J24, J25, J26, J27 |
| 4 | blue | LEDs:LED_1206_HandSoldering | LED1, LED2, LED3, LED4 |
| 3 | 10k | Potentiometers:Potentiometer_Trimmer_ACP_CA9v_Horizontal_Px10.0mm_Py5.0mm | RV1, RV2, RV4 |
| 3 | 2.2k | Resistors_SMD:R_1206_HandSoldering | R24, R25, R26 |
| 3 | Conn_01x02_Male | Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm | J1, J3, J6 |
| 3 | Q_NMOS_GSD | TO_SOT_Packages_SMD:SOT-23_Handsoldering | Q1, Q3, Q4 |
| 3 | SW_Push_Dual_OWN | Buttons_Switches_THT:SW_TH_Tactile_Omron_B3F-10xx | SW1, SW2, SW3 |
| 2 | 100 | Resistors_SMD:R_1206_HandSoldering | R16, R27 |
| 2 | 100k | Resistors_SMD:R_1206_HandSoldering | R20, R28 |
| 2 | 10k | Resistors_SMD:R_1206_HandSoldering | R14, R15 |
| 2 | 18pF | Capacitors_SMD:C_1206_HandSoldering | 18pF1, 18pF2 |
| 2 | 470k | Resistors_SMD:R_1206_HandSoldering | R22, R23 |
| 2 | 5VBreakdown_Zener | Diodes_SMD:D_MiniMELF_Handsoldering | D8, D9 |
| 2 | Conn_01x03_Male | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | J7, J8 |
| 2 | Fuse_Small | Fuse_Holders_and_Fuses:Fuseholder_Fuse_TR5_Littlefuse-No560_No460 | F1, F2 |
| 2 | TEST_1P | Measurement_Points:Measurement_Point_Round-SMD-Pad_Big | J14, J17 |
| 1 | 100n | Capacitors_SMD:C_1206_HandSoldering | C8 |
| 1 | 150nF | Capacitors_SMD:C_1206_HandSoldering | C13 |
| 1 | 1nF | Capacitors_SMD:C_1206_HandSoldering | C14 |
| 1 | 200 | Resistors_SMD:R_1206_HandSoldering | R2 |
| 1 | 200k | Resistors_SMD:R_1206_HandSoldering | R10 |
| 1 | 2k7 | Resistors_SMD:R_1206_HandSoldering | R17 |
| 1 | 3_6BreakDown | Diodes_SMD:D_MiniMELF_Handsoldering | D1 |
| 1 | 470 | Resistors_SMD:R_1206_HandSoldering | R13 |
| 1 | 91 | Resistors_SMD:R_1206_HandSoldering | R29 |
| 1 | ATMEGA128-16AU | Housings_QFP:TQFP-64_14x14mm_Pitch0.8mm | U3 |
| 1 | BC807 | TO_SOT_Packages_SMD:SOT-23_Handsoldering | Q2 |
| 1 | Buzzer | Buzzers_Beepers:MagneticBuzzer_ProSignal_ABT-410-RC | BZ1 |
| 1 | C | Capacitors_SMD:C_1206_HandSoldering | C3 |
| 1 | Conn_01x07_Female | Socket_Strips:Socket_Strip_Straight_1x07_Pitch2.54mm | J15 |
| 1 | Conn_01x08_Female | Socket_Strips:Socket_Strip_Straight_1x08_Pitch2.54mm | J4 |
| 1 | Conn_01x16 | Socket_Strips:Socket_Strip_Straight_1x16_Pitch2.54mm | J16 |
| 1 | Conn_02x03_Odd_Even | Pin_Headers:Pin_Header_Straight_2x03_Pitch2.54mm | J5 |
| 1 | Crystal_GND24_Small | Crystals:Crystal_SMD_3225-4pin_3.2x2.5mm | Y1 |
| 1 | Ferrite_Bead | Inductors_THT:L_Axial_L5.3mm_D2.2mm_P2.54mm_Vertical_Vishay_IM-1 | L1 |
| 1 | GND conn | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J11 |
| 1 | Jack-DC | Connectors:JACK_ALIM | J9 |
| 1 | LDR | Resistors_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Vertical | R11 |
| 1 | L_Core_Ferrite | Inductors_THT:L_Radial_D10.0mm_P5.00mm_Fastron_07M | L2 |
| 1 | PT1000 | Resistors_THT:R_Axial_DIN0411_L9.9mm_D3.6mm_P5.08mm_Vertical | R18 |
| 1 | Rotary_Encoder_With_CaseHolder | Myfootprints:Rotary_Encoder_CaseHolder | SW4 |
| 1 | USART test points | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | J2 |
| 1 | current sense | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J10 |
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Questions
How big is the Panel.bak PCB?
It measures 117.6 × 112.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Panel.bak use?
92 parts, built around the ATMEGA128-16AU and BC807. 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 Panel.bak KiCad files?
From the theQuetzalcoatl/avr-dev repository on GitHub, at the commit this page was made from: the board is HW/pcb/panel.bak.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Panel.bak 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).