2nd mainboard
About the 2nd mainboard PCB
2nd mainboard is an open source AVR/Arduino PCB design by Fiberprinter, published on GitHub. It is a 2-layer board measuring 99 × 99 mm, with 110 components from 64 distinct parts.
Its main chip is the ATMEGA328PB-A, from the AVR/Arduino family. Other key parts include the SQJ409EP-T1_GE3, SZ1SMB5927BT3G, TPS56837HRPAR, TPS565208 and FT232RL. By type, the board carries 38 capacitors, 24 connectors, 21 resistors, 11 ICs, 7 diodes and 5 test points.
It belongs with the robotics & motion and usb & debug tools designs in this gallery.
From the project
Dieses Repository enthält die Elektronikentwicklung für den faserverlegenden 3D-Drucker, der im Rahmen einer Diplomarbeit an der HTBLA Kaindorf entwickelt wird. Die Elektronik umfasst sowohl die Steuerung der Druckkopffunktionen als auch die Anbindung an das Hauptsystem mittels e
Dieses Repository enthält die Elektronikentwicklung für den faserverlegenden 3D-Drucker, der im Rahmen einer Diplomarbeit an der HTBLA Kaindorf entwickelt wird. Die Elektronik umfasst sowohl die Steuerung der Druckkopffunktionen als auch die Anbindung an das Hauptsystem mittels eines Raspberry Pi mit Klipper-Firmware.
Das Ziel dieses Projekts ist die Entwicklung einer modularen und effizienten Steuerung für den Druckkopf, die über eine eigenentwickelte Platine mit einem ATmega328 realisiert wird. Diese übernimmt spezifische Aufgaben, die über das Hauptsystem des Druckers nicht direkt…
Main components on the 2nd mainboard
2nd mainboard bill of materials (BOM)
110 components, 64 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SQJ409EP-T1_GE3 | SQJ409EP_T1_GE3 | U1 |
| 1 | SZ1SMB5927BT3G | SZ1SMB5927BT3G | U2 |
| 1 | TPS56837HRPAR | TPS56837HRPAR | U3 |
| 1 | TPS565208 | SOT-23-6 | U4 |
| 1 | FT232RL | SSOP-28_5.3x10.2mm_P0.65mm | U5 |
| 1 | PTS647SM38SMTR2LFS | SW_PTS647SM38SMTR2LFS_CNK | U6 |
| 1 | TPM16050-S6TR | TPM16050_S6TR | U7 |
| 2 | RJK0456DPB RJK0456DPB-00-J5 | RJK0456DPB_00_J5 | U8, U9 |
| 1 | ATMEGA328PB-A ATmega328PB-A | TQFP-32_7x7mm_P0.8mm | U10 |
| 1 | MPU-6050 | InvenSense_QFN-24_4x4mm_P0.5mm | U12 |
| 1 | DRV8825 Pololu_Breakout_DRV8825 | drv8825 | A1 |
| 1 | ECS-160 ECS-160-18-4X-CKM | XTAL_ECS-160-18-4X-CKM | Y1 |
| 1 | PJ-082BH | CUI_PJ-082BH | J1 |
| 2 | FAN_12/5V_REGELUNG Fan_12/5V_Regelung | FTS_103_01_F_S | J2, J3 |
| 1 | FAN0 | CONN_S2B-XH-A-1LFSN_JST | J4 |
| 1 | FAN1 | CONN_S2B-XH-A-1LFSN_JST | J5 |
| 1 | FAN2 | CONN_S2B-XH-A-1LFSN_JST | J6 |
| 1 | Stepper Motor | JST_S4B-XH-A-1 | J7 |
| 1 | Servo Motor SM | JST_XH_S3B-XH-A_1x03_P2.50mm_Horizontal | J8 |
| 1 | Microstepping | FTSH-103-01-L-DH | J9 |
Show 44 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Servo Motor BL Touch | JST_XH_S3B-XH-A_1x03_P2.50mm_Horizontal | J10 |
| 2 | T3 | 665102131822 | J11, J22 |
| 1 | Steckverbinder_Male_Fans | SAMTEC_TSM-107-04-L-DV | J12 |
| 1 | Steckverbinder_Female_Leistung | SAMTEC_HLE-107-02-L-DV | J13 |
| 1 | FAN3 | CONN_S2B-XH-A-1LFSN_JST | J14 |
| 1 | Steckverbinder_Female_Motoren | SAMTEC_HLE-107-02-L-DV | J15 |
| 1 | ISP | PinHeader_2x03_P2.54mm_Vertical | J16 |
| 1 | Quartz | PinSocket_1x02_P2.54mm_Vertical | J18 |
| 3 | T2 | 665102131822 | J19, J20, J21 |
| 1 | CONN_01X04_SOCKET Conn_01x04_Socket | PinSocket_1x04_P2.54mm_Vertical | J23 |
| 1 | Steckverbinder_Male_Leistung | SAMTEC_HW-07-08-L-D-250-SM | J24 |
| 1 | USB_C_RECEPTACLE_USB2.0_14P USB_C_Receptacle_USB2.0_14P | USB_C_Receptacle_GCT_USB4085 | P1 |
| 1 | QUARTZ_1 Quartz_1 | TestPoint_Loop_D3.80mm_Drill2.5mm | TP8 |
| 1 | QUARTZ_2 Quartz_2 | TestPoint_Loop_D3.80mm_Drill2.5mm | TP9 |
| 1 | I_SENSE_5VUSBC I_Sense_5V | TestPoint_2Pads_Pitch2.54mm_Drill0.8mm | TP22 |
| 1 | I_SENSE_5VPOW I_Sense_5V | TestPoint_2Pads_Pitch2.54mm_Drill0.8mm | TP23 |
| 1 | I_SENSE_12V I_Sense_12V | TestPoint_2Pads_Pitch2.54mm_Drill0.8mm | TP25 |
| 2 | WE-TVSP_DO-214AA_600W_BI | 824521241 | D1, D2 |
| 4 | YELLOW | LED_0805_2012Metric | D3, D4, D5, D6 |
| 1 | GREEN | LED_0805_2012Metric | D7 |
| 1 | 4.7µH | SPM10040T_4R7M_HZ | L1 |
| 1 | 3.3µH | IHLP2525CZER3R3M11 | L2 |
| 15 | 100NF 100nF | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C1, C6, C7, C10, C13, C16, C17, C20 +7 |
| 2 | 22NF 22nF | C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C2, C9 |
| 8 | 10µF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C4, C11, C12, C15, C24, C34, C36 |
| 1 | 10µF | C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C5 |
| 1 | 47µF | C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C8 |
| 1 | 22µF | C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C14 |
| 1 | 1UF 1uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C18 |
| 3 | 4.7UF 4.7uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C19, C25, C28 |
| 2 | 18PF 18pF | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C21, C22 |
| 4 | 0.1µF | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C30, C31, C32, C33 |
| 1 | 100K 100k | R_0402_1005Metric | R1 |
| 1 | 100K 100k | R_0603_1608Metric | R2 |
| 1 | 30K 30k | R_0402_1005Metric | R3 |
| 1 | 1K58 1k58 | R_0402_1005Metric | R4 |
| 1 | 30.1K 30.1k | R_0402_1005Metric | R5 |
| 1 | 10 | R_0402_1005Metric | R6 |
| 1 | 54.9K 54.9k | R_0402_1005Metric | R7 |
| 3 | 10K 10k | R_0402_1005Metric | R8, R11, R17 |
| 2 | 5K1 5k1 | R_0402_1005Metric | R9, R10 |
| 4 | 330 | R_0402_1005Metric | R12, R13, R14, R15 |
| 1 | 1k | R_0402_1005Metric | R16 |
| 4 | 4K7 4k7 | R_0402_1005Metric | R22, R23, R24, R25 |
2nd mainboard design files
The KiCad project lives in the Fiberprinter/fiberprinter-electronics repository on GitHub; these links point at the commit this page was built from.
2nd mainboard: common questions
What microcontroller does the 2nd mainboard use?
The 2nd mainboard is built around the ATMEGA328PB-A, from the AVR/Arduino family.
How big is the 2nd mainboard PCB?
The 2nd mainboard measures 99 × 99 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 2nd mainboard?
110 components, from 64 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 2nd mainboard design files?
From the Fiberprinter/fiberprinter-electronics 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 2nd mainboard design in my own project?
The repository has no license, so all rights stay with Fiberprinter. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the 2nd 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.
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