Request schematic on SEN0463 - Gravity: Geiger Counter Module Ionizing Radiation Detector
Nicolai.Andersen 2026-02-23 16:04:25 265 Views3 Replies Hi DFRobot Team and Community.
I am currently working with the Gravity: Geiger Counter Module (SEN0463) and would like to request the official schematic for this module.
I have noticed that DFRobot provides schematics for many other Gravity modules in their respective Wikis, but I haven't been able to find one for the SEN0463 yet.
Links:
https://www.dfrobot.com/product-2547.html
https://wiki.dfrobot.com/SKU_SEN0463_Gravity_Geiger_Counter_Module
Having the schematic would be a huge help for my project, as I need to understand the circuit layout better—especially regarding the high-voltage section and signal processing.
I have already tried reaching out via email but haven't received a response yet, so I’m hoping you can help me out here in the forum.
Thank you in advance!
Best regards,
Nicolai J. Andersen
Hi Nicolai, thanks for your follow-up and for reaching out to our support team via email! We’ve had the schematic of the Gravity Geiger Counter Module (SEN0463) evaluated by our product team, and unfortunately, we’re unable to provide the official schematic due to technical confidentiality considerations. We apologize for any inconvenience this may cause to your project and really appreciate your understanding.
niu.yixuan Hi DFrobot / Support Team.
Thank you for your follow-up.
However, I must express my deep confusion regarding the "technical confidentiality" of the Gravity Geiger Counter (SEN0463).
This decision stands in direct contradiction to DFRobot’s own stated mission and public identity:
Contradiction of Mission:
According to your official About Us page, your mission is to "form a community with easy access to hardware, software, and ideas."
Withholding a schematic for a fundamental sensor module directly hinders this "easy access".
https://www.dfrobot.com/about-us
Open-Source Evangelism:
DFRobot is widely recognized as one of the early evangelists of the Maker Movement and open-source hardware.
Claiming confidentiality on a circuit built around a generic NE555 timer and an M4011 tube—standard components used in the public domain for decades—does not align with the values of a leader in open hardware.
https://www.mouser.com/manufacturer/dfrobot/
Educational Barriers:
You state on your Education platform that you aim to empower future innovators by providing comprehensive resources.
In a classroom or research setting, "black-box" hardware with hidden schematics prevents students from performing failure analysis or understanding the physics of the circuit.
https://dfimg.dfrobot.com/nobody/wiki/8252d4a4dd10f33caf5e79a691152677.pdf
Inconsistency in Documentation:
DFRobot maintains an extensive GitHub repository and Wiki where most Gravity modules include full documentation.
It is highly inconsistent that this specific module is treated as a trade secret, while much more complex MCU-based boards are documented openly.
https://github.com/dfrobot
https://wiki.dfrobot.com/User_Manual
I chose DFRobot specifically because of your reputation for transparency and community support.
By refusing to provide a schematic for a simple analog circuit, you are effectively forcing users towards generic alternatives where the community has already reverse-engineered the design.
I kindly ask you to escalate this to your product team.
Transparency is the reason makers choose DFRobot over no-name competitors.
I hope you understand my point of view.
Best regards,
Nicolai
Quick update:
I have now received a reply via email and am currently in a dialogue with the support team regarding the possibility of getting the schematic.
I will update the thread again if there is any new information to share.
Best regards,
Nicolai J. Andersen
Nicolai.Andersen 
