4 layers180.3 × 114.9 mm
2 layers86.4 × 64.8 mm
Slot machine
google/google-ctf5.1kGoogle CTF
- Size
- 86.4 × 64.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 20
- Nets
- 30
- Pads
- 104
- Tracks, vias
- 166, 1
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 27 Apr 2018
- Updated
- 22 Oct 2026
Overview
Slot machine is an open-source printed circuit board by google, from the google/google-ctf repository on GitHub, published under the Apache-2.0 licence. It is a 2-layer board of 86.4 × 64.8 mm with 20 parts on 30 nets, routed with 166 tracks and 1 via.
It is built around the LM386. Its parts include 7 connectors, 6 capacitors, 3 ICs and 1 resistor. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
1README
README.mdGoogle CTF
This repository lists most of the challenges used in the Google CTF since 2017, as well as most of the infrastructure that can be used to run them. IMPORTANT - The code in the 201x and 202x folders have unfixed security vulnerabilities. These are there on purpose, and running these on real production infrastructure is not safe.
Read more about the Google CTF here: https://security.googleblog.com/2017/06/announcing-google-capture-flag-2017.html
Note this is not an official Google product.
Parts
20| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 100nF | Capacitors_SMD:C_1206_HandSoldering | C1, C2, C3 |
| 2 | CONN_1 | Pin_Headers:Pin_Header_Straight_1x01_Pitch2.54mm | NC, NC |
| 1 | 10 Ohm | Resistors_SMD:R_1206_HandSoldering | R1 |
| 1 | 220 uF | Capacitors_SMD:CP_Elec_8x5.4 | C5 |
| 1 | 47nF | Capacitors_SMD:C_1206_HandSoldering | C4 |
| 1 | 47uF | Capacitors_SMD:C_1206_HandSoldering | C6 |
| 1 | ATTINY48-P | Housings_DIP:DIP-28_W7.62mm_Socket | IC1 |
| 1 | Buttons | Pin_Headers:Pin_Header_Straight_1x12_Pitch2.54mm | P2 |
| 1 | CONN_1 | Socket_Strips:Socket_Strip_Straight_1x01_Pitch2.54mm | P6 |
| 1 | CONN_2 | Pin_Headers:Pin_Header_Straight_2x01_Pitch2.54mm | P3 |
| 1 | CONN_CARD | Socket_Strips:Socket_Strip_Straight_1x05_Pitch2.54mm | P5 |
| 1 | CONN_DSPL | Socket_Strips:Socket_Strip_Straight_1x11_Pitch2.54mm | P1 |
| 1 | CONN_SPEAKER | Pin_Headers:Pin_Header_Straight_2x01_Pitch2.54mm | P4 |
| 1 | LM386 | Housings_DIP:DIP-8_W7.62mm | U3 |
| 1 | MCP4725 | TO_SOT_Packages_SMD:SOT-23-6_Handsoldering | U2 |
| 1 | SW_PUSH | Buttons_Switches_THT:SW_PUSH_6mm | RESET |
| 1 | USB | Connectors:USB_Micro-B | J1 |
Questions
How big is the Slot machine PCB?
It measures 86.4 × 64.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Slot machine use?
20 parts, built around the LM386. 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 Slot machine KiCad files?
From the google/google-ctf repository on GitHub, at the commit this page was made from: the board is 2017/finals/2017-finals-re-slotmachine/pcb/slot_machine.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Slot machine design in my own project?
Its repository publishes it under the Apache-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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