2 layers110 × 60 mm
Arduino Spot Welder
KaeptnBalu/Arduino_Spot_Welder_V2
Arduino controlled Spot Welder for battery welding
53 parts78GPL-3.0
2 layers110 × 60 mm
Arduino Spot Welder
KaeptnBalu/Arduino_Spot_Welder_V278Arduino controlled Spot Welder for battery welding
- Size
- 110 × 60 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 57
- Nets
- 54
- Pads
- 169
- Tracks, vias
- 362, 18
- Pours
- 7
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 8 Mar 2017
- Updated
- 24 Jan 2018
Overview
Arduino Spot Welder is an open-source printed circuit board by KaeptnBalu, from the KaeptnBalu/Arduino_Spot_Welder_V2 repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 110 × 60 mm with 57 parts on 54 nets, routed with 362 tracks and 18 vias.
It is built around the MCP1407-E/P and IRFB7437PBF. Its parts include 14 resistors, 8 transistors, 5 connectors, 3 diodes and 2 capacitors. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
2README
KiCad_PCB_Files/Version 2.2/README.mdImprovements in Version 2.2
- Mosfet PCB now with 2oz copper layer and wider traces which connect the high current carrying mosfet legs to the u-shaped aluminum part
- little bit bigger mounting holes for u-shaped aluminum piece (2.6mm instead of 2.5mm)
- "AutoPulse" feature, which automatically activates a pulse after a 2 second delay when both welding tips touch the nickel strip (thanks to Petr Zverina for the idea)
The mosfet pcb update was done because some users who tryed welding with more than 1000A current reported that the pcb traces got damaged by the high current. Now it should be more resistant even to these very high currents.
The new "AutoPulse" feature only needs 5 small additional parts on the pcb. (470 Ohm resistor, 620 Ohm resistor, z-diode 4,3V 0,5w, 2,54mm jumper, 2 pin 2,54mm male header). Resistor R13 does not need to be populated. It was meant as a pull down resistor, but after looking close to the schematic i realised R14 + R15 already do the pull down to GND.
To activate the "AutoPulse" feature simply plug a jumper on the male 2 pin header named "Auto_Pulse" which connects the two pins.
You can get the new V2.2 PCB Sets here: https://malectrics.eu/
Parts
57| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 15 | Resistors_SMD:R_1206_HandSoldering | R2, R3, R4, R5, R6, R7, R8, R9 |
| 8 | IRFB_7437 | pots_own:TO-220__long_Neutral123_Horizontal_LargePads | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 |
| 4 | GND_con | Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm | P2, P3, P4, P5 |
| 2 | 20k | Resistors_SMD:R_1206_HandSoldering | R1, R12 |
| 2 | 220 | Resistors_SMD:R_1206_HandSoldering | R10, R11 |
| 2 | 620 | Resistors_SMD:R_1206_HandSoldering | R14, R15 |
| 2 | CONN_01X08 | pots_own:Pin_Header_Straight_1x08_Pitch2.54mm_Large_Pads | Mosfet_CTRL1, Mosfet_CTRL2 |
| 1 | 0.1µF | Capacitors_SMD:C_1210_HandSoldering | C1 |
| 1 | 12V | Wire_Pads:SolderWirePad_single_1mmDrill | W2 |
| 1 | 1µF | Capacitors_ThroughHole:C_Disc_D7.5mm_W5.0mm_P5.00mm | C2 |
| 1 | 7SEGMENTS | Displays_7-Segment:7SegmentLED_LTS6760_LTS6780 | DISPLAY |
| 1 | CONN_01X02 | Connectors_Molex:Molex_KK-6410-02_02x2.54mm_Straight | Foot_Switch |
| 1 | D | Diodes_SMD:D_SMA_Handsoldering | D1 |
| 1 | GND | Wire_Pads:SolderWirePad_single_1mmDrill | W1 |
| 1 | Jumper | Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm | Auto_Pulse |
| 1 | LED | Resistors_SMD:R_1206_HandSoldering | D2 |
| 1 | MCP1407 | Housings_DIP:DIP-8_W7.62mm_Socket_LongPads | P1 |
| 1 | POT | pots_own:RK09K1130A5R | Pulse_ADJ |
| 1 | ZENER | Diodes_SMD:D_MiniMELF_Handsoldering | D3 |
| 1 | arduino_nano | arduino:arduino_mini | U1 |
The 41 most common of 57 parts.
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Questions
How big is the Arduino Spot Welder PCB?
It measures 110 × 60 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Arduino Spot Welder use?
57 parts, built around the MCP1407-E/P and IRFB7437PBF. 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 Arduino Spot Welder KiCad files?
From the KaeptnBalu/Arduino_Spot_Welder_V2 repository on GitHub, at the commit this page was made from: the board is KiCad_PCB_Files/Version 2.2/Arduino_Spot_Welder.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Arduino Spot Welder 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).