2 layers40.6 × 90.4 mm
2 layers100 × 100 mm
Atmega
yug404/kicad- Size
- 100 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 44
- Nets
- 45
- Pads
- 196
- Tracks, vias
- 498, 72
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 2 Mar 2026
- Updated
- 2 Mar 2026
Overview
Atmega is an open-source printed circuit board by yug404, from the yug404/kicad repository on GitHub. It is a 2-layer board of 100 × 100 mm with 44 parts on 45 nets, routed with 498 tracks and 72 vias.
It is built around the ATMEGA328-AU, LM2596S-5.0 and LM2596S-ADJ. Its parts include 15 capacitors, 8 connectors, 7 resistors, 5 ICs and 2 diodes. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
3
ATMEGA328-AU
TQFP-32(7x7)-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 23 2KB 32KB 8 Bit AVR Built-in FLASH TQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
LM2596S-5.0
TO-263-5-40℃~+125℃@(TJ) 1 150kHz 3A 4.5V~40V 5V 5mA Buck Buck Built-in Fixed No TO-263-5 DC-DC Converters ROHSTexas InstrumentsDC-DC ConvertersLM2596S-ADJ
TO-263-5-40℃~+125℃@(TA) 1 1.2V~37V 150kHz 3A 40V 80uA Adjustable Buck Buck Built-in No TO-263-5 DC-DC Converters ROHSUMWDC-DC Converters
Parts
44| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 220u | Capacitor_SMD:CP_Elec_8x10 | C2, C5, C6, C7 |
| 4 | 470u | Capacitor_SMD:CP_Elec_8x10 | C1, C3, C13, C14 |
| 4 | Conn_01x02 | Connector_JST:JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J2, J3, J9, J10 |
| 2 | 0.1u | Capacitor_SMD:C_0805_2012Metric | C9, C15 |
| 2 | 100n | Capacitor_SMD:C_0805_2012Metric | C4, C12 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric | R5, R6 |
| 2 | 22p | Capacitor_SMD:C_0805_2012Metric | C10, C11 |
| 2 | 33u | Inductor_SMD:L_10.4x10.4_H4.8 | L1, L2 |
| 2 | 4.7k | Resistor_SMD:R_0805_2012Metric | R7, R8 |
| 2 | Battery_Cell | Battery:BatteryHolder_Keystone_1042_1x18650 | BT1, BT2 |
| 2 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J7, J8 |
| 2 | D_Schottky | Diode_SMD:D_SMA | D1, D2 |
| 2 | TB6612FNG | Package_SO:SSOP-24_5.3x8.2mm_P0.65mm | U4, U5 |
| 1 | 1000u | Capacitor_SMD:CP_Elec_8x10 | C8 |
| 1 | 100k | Resistor_SMD:R_0805_2012Metric | R1 |
| 1 | 1k | Resistor_SMD:R_0805_2012Metric | R3 |
| 1 | 3.3k | Resistor_SMD:R_0805_2012Metric | R2 |
| 1 | ATmega328-A | Package_QFP:TQFP-32_7x7mm_P0.8mm | U3 |
| 1 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J6 |
| 1 | Conn_02x03_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J1 |
| 1 | Crystal | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | FerriteBead | Resistor_SMD:R_0805_2012Metric | FB1 |
| 1 | LM2596S-5 | Package_TO_SOT_SMD:TO-263-5_TabPin3 | U1 |
| 1 | LM2596S-ADJ | Package_TO_SOT_SMD:TO-263-5_TabPin3 | U2 |
| 1 | Q_PMOS_GDS | Package_TO_SOT_SMD:SOT-23 | Q1 |
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Questions
How big is the Atmega PCB?
It measures 100 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Atmega use?
44 parts, built around the ATMEGA328-AU, LM2596S-5.0 and LM2596S-ADJ. 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 Atmega KiCad files?
From the yug404/kicad repository on GitHub, at the commit this page was made from: the board is pcb_7(incomplete)/atmega.kicad_pcb and its schematic pcb_1/led.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Atmega design in my own project?
Its repository states no licence, so its author keeps all rights: ask yug404 before reusing the design.