olexsu/ATmega328_control_BoardCustom ATmega328 embedded control board designed in KiCad with Arduino firmware.
ATMega 328 PU Board is an open-source printed circuit board by olexsu, from the olexsu/ATmega328_control_Board repository on GitHub. It is a 4-layer board of 124 × 89.4 mm with 140 parts on 136 nets, routed with 955 tracks and 586 vias.
It is built around the ATMEGA16U2-AU, ATMEGA328PB-AU and LMV358, with the MAX485ED, LP2985-33DBV and NCP1117ST among its other parts. Its parts include 53 resistors, 21 capacitors, 16 diodes, 13 connectors and 7 ICs. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Custom embedded control board based on the ATmega328PU microcontroller, designed in KiCad and compatible with Arduino firmware.
External 16 MHz crystal verified using oscilloscope.
Board powered and tested using laboratory power supply.
16×2 LCD connected to the ATmega328 board to verify digital IO functionality and firmware operation. Display output confirms correct microcontroller operation.
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hardware – KiCad PCB design
firmware – Arduino firmware
gerbers – manufacturing files
bom – bill of materials
docs – schematic PDF
images – hardware prototype photos
Clock oscillator verified with oscilloscope.
Board powered and tested using laboratory power supply.
v0.1 – Initial prototype PCB
v0.2 – Improved routing and component placement
v0.3 – Stable prototype, validated clock and power supply
AL Robotics
| Qty | Value | Footprint | References |
|---|---|---|---|
| 15 | 100 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R26, R27, R29, R30, R38, R41, R42, R43, R44, R45, R46, R47, R48, R49, R53 |
| 9 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C7, C9, C10, C11, C12, C18, C19, C20 |
| 7 | LED | Diode_SMD:D_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1, D4, D5, D9, D15, D16, D17 |
| 6 | 100K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R15, R23, R25, R34, R35, R52 |
| 6 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6, R8, R9, R10, R11, R14 |
| 6 | 4K7 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R16, R17, R18, R19, R50, R51 |
| 4 | 10K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R7, R20, R21, R22 |
| 4 | 1K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R28, R31, R32, R33 |
| 4 | 22pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C3, C13, C14 |
| 4 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q4, Q5, Q6, Q7 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 4 | SS14 | Diode_SMD:D_SMA | D11, D12, D13, D14 |
| 4 | Screw_Terminal_01x02 | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J10, J11, J12, J13 |
| 3 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R12 |
| 2 | 0.1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C15, C16 |
| 2 | 1M | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R13 |
| 2 | 1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4, C5 |
| 2 | 22 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4, R5 |
| 2 | 47 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R39, R40 |
| 2 | 47uF | Capacitor_THT:C_Radial_D5.0mm_H11.0mm_P2.00mm | C6, C8 |
| 2 | 680 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R36, R37 |
| 2 | ABLS-16.000MHZ-D-4-T | Crystal:Crystal_SMD_HC49-SD_HandSoldering | Y1, Y2 |
| 2 | AVR-ISP-6 | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J2, J4 |
| 2 | BLM21AG121BH1D | Inductor_SMD:L_0805_2012Metric_Pad1.05x1.20mm_HandSolder | FB1, FB2 |
| 2 | CG0603MLC-05E | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | RV1, RV2 |
| 2 | Jack-DC | Connector_BarrelJack:BarrelJack_CUI_PJ-102AH_Horizontal | J3, J8 |
| 2 | MF-MSMF050-2 | Fuse:Fuse_1812_4532Metric_Pad1.30x3.40mm_HandSolder | F1, F6 |
| 2 | MMSD4148T1G | Diode_SMD:D_SOD-123 | D2, D6 |
| 2 | TBU-CA-065-200-WH | Fuse:Fuse_Bourns_TBU-CA | F2, F3 |
| 2 | TP_5V | TestPoint:TestPoint_Pad_1.5x1.5mm | TP1, TP2 |
| 1 | 0805L200SLTHYR | Fuse:Fuse_0805_2012Metric_Pad1.15x1.40mm_HandSolder | F4 |
| 1 | 10nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C21 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C17 |
| 1 | 120 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R24 |
| 1 | ATmega16U2-A | Package_QFP:TQFP-32_7x7mm_P0.8mm | U4 |
| 1 | ATmega328PB-A | Package_QFP:TQFP-32_7x7mm_P0.8mm | U6 |
| 1 | B5819W | Diode_SMD:D_SOD-123 | D3 |
| 1 | CDSOT23-SM712 | Package_TO_SOT_SMD:SOT-23 | D8 |
| 1 | Conn_01x04_Socket | Connector_JST:JST_PH_B4B-PH-K_1x04_P2.00mm_Vertical | J5 |
| 1 | Conn_02x05_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x05_P2.54mm_Vertical | J9 |
| 1 | Conn_02x08_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x08_P2.54mm_Vertical | J6 |
| 1 | DMG2305UX | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | FDN340P | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | LMV358 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | LP2985-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | MAX485E | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U7 |
| 1 | MCP23017_ML | Package_DFN_QFN:QFN-28-1EP_6x6mm_P0.65mm_EP4.25x4.25mm | U2 |
| 1 | NCP1117 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U5 |
| 1 | PTSAHT120624V050 | Fuse:Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder | F5 |
| 1 | SMAJ6.0A | Diode_SMD:D_SMA | D7 |
| 1 | SW_Push | Button_Switch_SMD:SW_Tactile_SPST_NO_Straight_CK_PTS636Sx25SMTRLFS | SW1 |
| 1 | Screw_Terminal_01x03 | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-3-5.08_1x03_P5.08mm_Horizontal | J7 |
| 1 | TP10_5V | TestPoint:TestPoint_Pad_1.5x1.5mm | TP10 |
| 1 | TP5_5V | TestPoint:TestPoint_Pad_1.5x1.5mm | TP5 |
| 1 | TP8_5V | TestPoint:TestPoint_Pad_1.5x1.5mm | TP8 |
| 1 | TP9_GND | TestPoint:TestPoint_Pad_1.5x1.5mm | TP9 |
| 1 | TP_3.3V | TestPoint:TestPoint_Pad_1.5x1.5mm | TP6 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_Molex-105017-0001 | J1 |
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It measures 124 × 89.4 mm and has 4 copper layers, 1.6 mm thick.
140 parts, built around the ATMEGA16U2-AU, ATMEGA328PB-AU, LMV358 and MAX485ED. 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.
From the olexsu/ATmega328_control_Board repository on GitHub, at the commit this page was made from: the board is hardware/ATMega_328_PU_Board/ATMega_328_PU_Board.kicad_pcb and its schematic hardware/ATMega_328_PU_Board/ATMega_328_PU_Board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask olexsu before reusing the design.