2 layers
Encoder
byrantech/laptop
anyon_e, a highly integrated, high end, open source laptop. Attempt the impossible.
7 parts4.3kMIT
2 layers100 × 70 mm
MagFire
KnowScratcher/MagFireA portable magnetic cannon.
- Size
- 100 × 70 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 7
- Nets
- 7
- Pads
- 16
- Tracks, vias
- 23, 0
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 29 May 2025
- Updated
- 28 Jun 2025
Overview
MagFire is an open-source printed circuit board by KnowScratcher, from the KnowScratcher/MagFire repository on GitHub. It is a 2-layer board of 100 × 70 mm with 7 parts on 7 nets, routed with 23 tracks and 0 vias.
Its parts include 2 switches, 1 capacitor, 1 IC, 1 diode and 1 inductor.
README
README.mdMagFire
Fire!!!
BOM
| Item | Amount | Price(USD) | Total(USD) | Total(TWD) |
|---|---|---|---|---|
| DC-DC 390v Transformer | 1 | 4.85 | 4.85 | 145 |
| Copper wire (0.5mm) | ? | ? | ? | |
| Button | 2 | 0.3 | 0.6 | 20 |
| Voltage indicator(dc 400v) | 0~1 | ? | ? | ? |
| Capacitor 1000uF 400v | 1 | 7.45 | 7.45 | 220 |
| Custom PCB | 1 | 2~4 | 4 | 60 |
| Iron ball (D=10mm) | 1 | 0.17 | 0.17 | 5 |
| Total | 17.07 | 450 |
Journal
The journal is in JOURNAL.md
How it all started?
I'm inspired by some youtuber making coil gun. So I decided to make one myself.
What will it do?
it's a toy that fires little metal ball. basically you can charge it with a battery and when you press fire, the ball will shoot out.
- store energy in a capacitor
- fire a metal ball when the button is pressed
Design
Schematic
PCB
Parts
7| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | SW_Push | Connector_Wire:SolderWire-0.75sqmm_1x02_P7mm_D1.25mm_OD3.5mm | SW1, SW2 |
| 1 | 1N4007 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D1 |
| 1 | Battery | Connector_Wire:SolderWire-0.75sqmm_1x02_P7mm_D1.25mm_OD3.5mm | BT1 |
| 1 | C_US | Capacitor_THT:CP_Radial_D35.0mm_P10.00mm_SnapIn | C1 |
| 1 | L | Connector_Wire:SolderWire-0.75sqmm_1x02_P7mm_D1.25mm_OD3.5mm | L1 |
| 1 | ~ | KS_Maker:DC-DC390v_transformer_2 | U1 |
Questions
How big is the MagFire PCB?
It measures 100 × 70 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MagFire use?
7 parts. 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 MagFire KiCad files?
From the KnowScratcher/MagFire repository on GitHub, at the commit this page was made from: the board is MagFire/MagFire.kicad_pcb and its schematic MagFire/MagFire.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the MagFire design in my own project?
Its repository states no licence, so its author keeps all rights: ask KnowScratcher before reusing the design.
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