

Stop if crash
Open Hardware Video Magazine
- Size
- 40 × 60 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 17
- Pads
- 63
- Tracks, vias
- 104, 0
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 29 Dec 2023
- Updated
- 2 Jun 2024
Overview
Stop if crash is an open-source printed circuit board by Green-bms, from the Green-bms/oh repository on GitHub. It is a 2-layer board of 40 × 60 mm with 25 parts on 17 nets, routed with 104 tracks and 0 vias.
It is built around the NE555D and 2N2222A. Its parts include 7 resistors, 4 diodes, 3 capacitors, 2 ICs and 2 transistors.
Main components
2README
README.mdOH!

OH! is a video magazine of Opensource Hardware projects streaming for free on @oh_video Youtube channel.
2024 edition
Issue 01 - Play with NeoMatrix
Streaming release date: 02/01/2024
Youtube page: https://youtu.be/Kcz4IKiXUUs?si=wSDmESj03bVOOBnR
In this issue we see how to program the WS2812B 8x8 RGB LED matrices.
Resources: https://github.com/Green-bms/oh/tree/master/2024%20edition/Issue%201
Issue 02 - Stop If Crash Watchdog
Streaming release date: 13/01/2024
Youtube page: https://youtu.be/fLkRN2xnHXY?si=DeNB-EbN8AmZp_JL
In this issue I present my project "Stop If Crash", a simple Watchdog circuit based on IC NE555.
We will see together a simulation of the circuit, the design of the PCB with Kicad, the assembly with the functional test in the laboratory.
Resources: https://github.com/Green-bms/oh/tree/master/2024%20edition/Issue%2002
Issue 03 - OpticalShow
Streaming release date: 30/01/2024
Youtube page: https://youtu.be/mVdG0zdTeCE?si=hjvFPSwVRxgswea1
OpticalShow is a system that uses optical fibers to transmit the light emitted by an RGB LED matrix.
Each fiber is associated with its own LED and allows you to remote its RGB light to animate projects, such as panels, maps, artistic objects and wearables.
in this issue, in addition to describing the OpticalShow system, I show two application examples: "The world is mine!", a map of the world animated and illuminated by optical fibers and "Gloween Show" a small panel used in the Halloween party.
Resources:
-
OpticalShow. Hackaday: https://hackaday.io/project/189963-opticalshow
Github: https://github.com/Green-bms/OpticalShow
You can buy mask here: https://www.pcbway.com/project/shareproject/OpticalShow_mask_225f24a0.html
You can buy card here: https://www.pcbway.com/project/shareproject/OpticalShow_card_PCB_6144c0a7.html -
The World is mine. https://www.instructables.com/The-World-Is-Mine/
-
Gloween Show. https://www.instructables.com/Gloween-Show/
Issue 04 - CNC PCB milling
Streaming release date: 13/02/2024
Youtube page: https://www.youtube.com/watch?v=61v8TkvMFBA
Make PCB with CNC milling machine
In this issue I present to you my economical CNC milling machine Vevor CNC 3018 PRO, with which I started making PCBs for my simplest projects.
In addition to describing the milling machine, we will create a small step by step project together, from the CAD drawing of the PCB to the milling!
If you also want to practice with the same PCB shown in the video, you can download all the CAD, CAM and CNC files from the following link:
https://github.com/Green-bms/oh/tree/master/2024%20edition/Issue%2004
Opensource applications used :
- Kicad: https://www.kicad.org/
- Flatcam: http://flatcam.org/
- Candle: https://github.com/Denvi/Candle
Issue 05 - EV Lithium upgrades
Streaming release date: 27/02/2024
Youtube page: https://www.youtube.com/watch?v=jmhK0d0eKHg
In this issue I take a trip back in time to tell you about my projects related to electric mobility.
Today there is a lot of talk about electric mobility.
I started to be interested in 2-wheeled electric vehicles in 2013, so I could go to work every day while polluting less!
I gave life back to 3 electric motorbikes that had exhausted batteries, transforming them into high-performance vehicles, with lithium batteries!
The vehicles I upgraded are:
E-tropolis Belair,
Vectrix Vx1 and e-max 110s
I have decided to share with you this exciting experience that lasted 10 years.
I have shared the documents of my upgrades at the following links: https://github.com/Green-bms/oh/tree/master/2024%20edition/Issue%2005
Issue 06 - Smart BMS (part 1)
Streaming release date: 12/03/2024
Youtube page: https://youtu.be/0NjMYVWZLLw?si=yNR26aHXIvKIdVsY
In this issue I start to talk to you about my first Opensource project: Smart BMS - Battery Management System.
I have shared the documents of the project at the following links:
Github: https://github.com/Green-bms/SmartBMS
Hackaday: https://hackaday.io/project/181453-green-bms
Issue 07 - Smart BMS (part 2)
Streaming release date: 26/03/2024
Youtube page: https://youtu.be/d0Qe47wP7eQ?si=s2jLH3D_zc0WCvRl
In this issue I continue to describe my first Opensource project: Smart BMS - Battery Management System
I have shared the documents of the project at the following links:
Github: https://github.com/Green-bms/SmartBMS
Hackaday: https://hackaday.io/project/181453-green-bms
Issue 08 - Smart BMS (part 3)
Streaming release date: 09/04/2024
Youtube page: https://youtu.be/FND_0AVq5Ik?si=xOSsRHYRp_0sxjTm
In this issue I continue to describe my first Opensource project: Smart BMS - Battery Management System
I have shared the documents of the project at the following links:
Github: https://github.com/Green-bms/SmartBMS
Hackaday: https://hackaday.io/project/181453-green-bms
Issue 09 - Green Detect Wireless Sensor Network
Streaming release date: 23/04/2024
Youtube page: https://youtu.be/QgU09LJju4c?si=UmGGuCsF_K0YVous
In this issue I describe my Opensource project: Green Detect Wireless Sensor Network Platform (WSN) , for environmental monitoring.
I have shared the documents of the project at the following links:
Github: https://github.com/Green-bms/GreenDetect
Hackaday: https://hackaday.io/project/186064-green-detect
Issue 10 - Green Detect Windows application
Streaming release date: 07/05/2024
Youtube page: https://youtu.be/rTwm69dqrus?si=7FWuEQkdGhM1CUF-
In this issue I describe the Green Detect application in detail.
I show you how to manage and configure the wireless sensor network.
I have shared the documents of the project at the following links:
Github: https://github.com/Green-bms/GreenDetect
Hackaday: https://hackaday.io/project/186064-green-detect
Issue 11 - Green Detect Windows application
Streaming release date: 21/05/2024
Youtube page: https://youtu.be/-PUpspmr6Rk?si=hIGa6V5kiF8c8neI
This issue is dedicated to system tests, we will test a network with 60 modules, fault simulations and a working prototype on the balcony of my house!
I have shared the documents of the project at the following links:
Github: https://github.com/Green-bms/GreenDetect
Hackaday: https://hackaday.io/project/186064-green-detect
Warning
All projects, tests and experiments shown and shared in this repository may contain errors and malfunctions and are without warranty.
If you decide to make them, remember that it is at your own risk
The use of this project may not be compliant with local laws or regulations.
License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. https://creativecommons.org/licenses/by-sa/4.0/
You are free to:
Share — copy and redistribute the material in any medium or format
Adapt — remix, transform, and build upon the material for any purpose, even commercially. This license is acceptable for Free Cultural Works. The licensor cannot revoke these freedoms as long as you follow the license terms.
Under the following terms:
Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
Notices:
You do not have to comply with the license for elements of the material in the public domain or where your use is permitted by an applicable exception or limitation. No warranties are given. The license may not give you all of the permissions necessary for your intended use. For example, other rights such as publicity, privacy, or moral rights may limit how you use the material.
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 2 | 100n | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C1, C3 |
| 2 | 2N2222A | Package_TO_SOT_THT:TO-92 | Q1, Q2 |
| 2 | 330 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R2, R6 |
| 2 | Conn_01x03 | TerminalBlock_Phoenix:TerminalBlock_Phoenix_PT-1,5-3-5.0-H_1x03_P5.00mm_Horizontal | J1, J2 |
| 2 | D | Diode_THT:D_DO-15_P2.54mm_Vertical_AnodeUp | D1, D3 |
| 2 | LED | LED_THT:LED_D3.0mm | D2, D4 |
| 1 | 10 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R4 |
| 1 | 100/16v | Capacitor_THT:CP_Radial_D8.0mm_P5.00mm | C2 |
| 1 | 1K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R3 |
| 1 | 270 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R5 |
| 1 | 470 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R7 |
| 1 | 47k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R1 |
| 1 | 4N35 | Package_DIP:DIP-6_W7.62mm | U2 |
| 1 | NE555D | Package_DIP:DIP-8_W7.62mm | U1 |
| 1 | SANYOU_SRD_Form_C | Relay_THT:Relay_SPDT_SANYOU_SRD_Series_Form_C | K1 |
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Questions
How big is the Stop if crash PCB?
It measures 40 × 60 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Stop if crash use?
25 parts, built around the NE555D and 2N2222A. 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 Stop if crash KiCad files?
From the Green-bms/oh repository on GitHub, at the commit this page was made from: the board is 2024 edition/Issue 02/Kicad/Stop if crash/Stop if crash.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Stop if crash design in my own project?
Its repository states no licence, so its author keeps all rights: ask Green-bms before reusing the design.