FlippenHeimer Turns Flipper Zero into an Ultra-Compact Geiger Counter Module

Designed to be integrated with the multi-purpose electronic tool Flipper Zero, the FlippenHeimer functions as a miniature Geiger counter add-on module. Using the Flipper’s display and power supply, users can keep an eye on the levels of beta and gamma radiation, making it a portable radiation detector.

The FlippenHeimer, which draws its foundation on a J305 Geiger–Müller tube, proposes graph-based visual feedback and real-time data logging. In addition to that, the device features “atomic dice roller” functionality that creates unpredictable results by utilizing the sporadic nature of radioactive decay. LM358 op-amps, 2N3904 and MPSA42 transistors, 555 timers, inductors, and high-voltage capacitors comprise a few of the device’s fundamental components. By virtue of the aforementioned characteristics, this gadget can be readily utilized and employed to perform tasks like creating random values, monitoring radiation levels for hobbyists, and raising awareness of environmental issues.

FlippenHeimer Specifications:

• Interface: Connects to Flipper Zero via GPIO/UART (plug-and-play with 2.54mm angled pin GPIO header)
• Detector: J305 Geiger-Müller glass tube functions as a gamma and beta radiation detection device
• Display: Flipper Zero display is used for live CPS-CPM/µSv readout (via community app)
• Feedback: Audible clicker and visual LED indicator for real-time detection
• Power Supply:
  • Tube Operating voltage: 400V DC generated via onboard boost converter
  • Main power: Powered by Flipper Zero (no external power required)
• Dimensions: 117 x 28.9 x 17.7 mm (with 3D printed casing)
• Enclosure: Optional 3D-printable model available

This Geiger counter module for Flipper Zero works with custom firmware forks like RogueMaster and Unleashed. The project is completely open-sourced, and all the necessary details, including schematic, app compatibility details, calibration steps, and required electronic components, can be found on FlippenHeimer’s GitHub repository.

Previously, we covered the Flipper Blackhat — a Linux-based add-on device introduced by Flipper Lab, designed for the Flipper platform and primarily aimed at WiFi hacking and penetration testing. Feel free to check it out if you’re interested in this add-on.

The FlippenHeimer module comes in three versions – the Ultimate (fully calibrated and assembled with a 3D-printed enclosure), the El Handy KIT (DIY kit excluding 3D printed parts), and Poverty (only the PCB with SMDs pre-soldered). The kit is priced at $44.99 on the Tindie Store.