Spot Welder Hardware
About the Spot Welder Hardware PCB
Spot Welder Hardware is an open source AVR/Arduino PCB design by andrewvh4, published on GitHub. It is a 2-layer board measuring 263.7 × 182.9 mm, with 150 components from 48 distinct parts.
Its main chip is the ED3050-5, from the AVR/Arduino family. Other key parts include the 811-2692, FAN3122TMX and FT232RL. By type, the board carries 48 capacitors, 42 resistors, 20 diodes, 13 transistors, 10 inductors and 5 ICs.
From the project
A Design for a low-cost spot welder used in electronics assembly
Main components on the Spot Welder Hardware
Spot Welder Hardware bill of materials (BOM)
150 components, 48 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 811-2692 OKI Digikey | OKI_Horisontal | U1 |
| 1 | ED3050-5 ATMEGA328P Digikey | DIP-28_W7.62mm | U2 |
| 2 | FAN3122TMX FAN3122TMXCT-ND Digikey | SOIC-8_3.9x4.9mm_Pitch1.27mm | U3, U5 |
| 1 | FT232RL Digikey | SSOP-28_5.3x10.2mm_Pitch0.65mm | U4 |
| 1 | 2N7002PW Q_NMOS_GSD Digikey | SOT-323_SC-70_Handsoldering | Q1 |
| 1 | MMBT3904TPMS MBT3904 Digikey | SOT-23 | Q2 |
| 11 | NMOSFET-PSMN1R1-30PL Q_NMOS_GDS Digikey | TO-220-3_Vertical | Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10 +3 |
| 1 | XC1592 Crystal Digikey | Crystal_SMD_HC49-SD_HandSoldering | Y1 |
| 1 | 151-1206-1 Mini USB Digikey | MiniUSB_SMT | J1 |
| 1 | Conn_01x03_Male | Pin_Header_Straight_1x03_Pitch2.54mm | J2 |
| 1 | 668-1336-1 Buzzer Digikey | BUZZER_SMI_1324_TW_5V_2_R | BZ1 |
| 2 | BananaConnector | Banana_Jack_1Pin | Conn1, Conn2 |
| 1 | AndersonPP | Anderson_2_Horisontal_Side_by_Side | Conn3 |
| 1 | WM4901 Molex_SL_3 Digikey | MOLEX_SL_3_Horizontal | Conn4 |
| 2 | CKN9088 SW_Push Digikey | SPST_Pushbutton | SW1, SW4 |
| 1 | CKN9628 SW_SPDT Digikey | SPDT_Switch | SW2 |
| 1 | CKN10358 Lead Voltage Trigger Digikey | SPST_DIP_Switch | SW3 |
| 1 | 350-2032-1 5V Digikey | LED_0603_HandSoldering | D1 |
| 1 | 160-1443-1 Pulse Digikey | LED_0603_HandSoldering | D2 |
| 1 | 350-2032-1 7.5V Digikey | LED_0603_HandSoldering | D3 |
Show 28 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 160-1443-1 Ext Trigger Digikey | LED_0603_HandSoldering | D4 |
| 1 | 160-1443-1 10V Digikey | LED_0603_HandSoldering | D5 |
| 1 | 160-1443-1 Logic Digikey | LED_0603_HandSoldering | D6 |
| 1 | 160-1443-1 12.5V Digikey | LED_0603_HandSoldering | D7 |
| 2 | 478-7798-1 D_Schottky Digikey | D_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D8, D9 |
| 1 | MMSZ5244BT1GOS 14V Digikey | D_SOD-123 | D10 |
| 1 | 475-2512-1 Over Voltage Digikey | LED_0603_HandSoldering | D11 |
| 1 | B0520LW-FDI 20V Digikey | D_SOD-123 | D12 |
| 5 | MUR1560GOS D Digikey | TO-220-2_Vertical | D13, D14, D15, D16, D19 |
| 1 | 160-1443-1 TX Digikey | LED_0603_HandSoldering | D17 |
| 1 | 160-1443-1 RX Digikey | LED_0603_HandSoldering | D18 |
| 1 | 160-1443-1 FTDI PWR Digikey | LED_0603_HandSoldering | D20 |
| 10 | 732-1593-1 Ferrite_Bead Digikey | L_0603_HandSoldering | L1, L2, L3, L4, L5, L6, L7, L8 +2 |
| 31 | 565-2620 47mF Digikey | CP_Radial_D30.0mm_P10.00mm_SnapIn | C1, C2, C3, C4, C5, C6, C8, C9 +23 |
| 8 | 399-8012-1 C Digikey | C_0805_HandSoldering | C7, C11, C15, C19, C23, C24, C28, C32 |
| 5 | 399-1100-1 .1uF Digikey | C_0603_HandSoldering | C39, C40, C46, C47, C48 |
| 2 | 399-7874-1 22pF Digikey | C_0603_HandSoldering | C41, C42 |
| 2 | 490-10728-1 10uF Digikey | C_0603_HandSoldering | C43, C44 |
| 7 | RHM510D 500 Digikey | R_0603_HandSoldering | R1, R3, R5, R6, R7, R8, R9 |
| 8 | RHM10KAD 10K Digikey | R_0603_HandSoldering | R2, R17, R18, R20, R22, R27, R33, R40 |
| 4 | RHM1.0KD 1K Digikey | R_0603_HandSoldering | R4, R19, R24, R25 |
| 2 | MCT0603-3.00K-CF 3000 Digikey | R_0603_HandSoldering | R10, R15 |
| 3 | RHM1.0KD 1000 Digikey | R_0603_HandSoldering | R11, R16, R39 |
| 3 | YAG1224 5 Digikey | R_Axial_Power_L25.0mm_W6.4mm_P30.48mm | R12, R13, R14 |
| 1 | P249BL 250 Digikey | R_0603_HandSoldering | R21 |
| 10 | RHM10.0AD 10 Digikey | R_0603_HandSoldering | R23, R26, R28, R29, R30, R31, R32, R34 +2 |
| 2 | 311-330HR 330 Digikey | R_0603_HandSoldering | R35, R37 |
| 2 | 1000 | R_0603_HandSoldering | R41, R42 |
Spot Welder Hardware design files
The KiCad project lives in the andrewvh4/Spot_Welder_Hardware repository on GitHub; these links point at the commit this page was built from.
Spot Welder Hardware: common questions
What microcontroller does the Spot Welder Hardware use?
The Spot Welder Hardware is built around the ED3050-5, from the AVR/Arduino family.
How big is the Spot Welder Hardware PCB?
The Spot Welder Hardware measures 263.7 × 182.9 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Spot Welder Hardware?
150 components, from 48 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 Spot Welder Hardware design files?
From the andrewvh4/Spot_Welder_Hardware repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Spot Welder Hardware design in my own project?
The repository has no license, so all rights stay with andrewvh4. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Spot Welder Hardware 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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