Here are some of the most important key facts:
- Compact design: Total size 120 x 50 mm. Approx. 70 x 50 mm area for electronics and additional 50 x 50 mm to mount a scintillator.
- All-in-one: No external parts (e.g. sound card) required to record gamma spectra.
- Standalone spectra recordings on built-in flash.
- Easily programmable using drag-and-drop firmware files or the standard Arduino IDE.
- Low-voltage device: No HV needed like with photomultiplier tubes.
- Can use SiPMs in the voltage range of 27.5 V to 33.8 V.
- 4096 ADC channels with built-in 3 V voltage reference.
- Energy resolution of up to 7% @ 662 keV possible; highly dependent on your SiPM/scintillator assembly.
- Energy Mode: ~20 µs total dead time while measuring energy (default settings).
- Geiger Mode: <5 µs total dead time without energy measurements (default settings).
- Low power consumption: ~20 mA @ 5 V with default firmware at normal background.
- Built-in ticker (buzzer) for audible pulse count rate output.
- Additional broken-out power pins and I2C, SPI and UART headers for custom parts (e.g. display, µSD card, etc.).
- Simple OLED support out of the box (SSD1306 and SH110x).
- Built-in True Random Number Generator.
More information can also be found in the GitHub repository...
Ok nice, but how do I get it?
- DIY version: Download BOM and Gerber files or use Kitspace.
- Buy a complete board: Head over to Tindie.
The principle of operation for the detector looks like this:
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Hi,
first of all I want to thank you for your effort, kindness and your patience ;). I ordered (unfortunately) Rev.3 boards at first via kitspace and had some issues to get the raspberry running. I ordered Rev.4 boards now and wait for them to arrive. Neither the readily compiled uf2 nor the compiled ino (Rev.4 now) worked in the beginning. Setting up the Arduino IDE on a newly installed laptop got it working partly. I could see the output in a serial window, but neither one of my displays (SSH_1306 or SH_1106) did work. I compiled the ino several times with different I2C addresses (3C vs 3D) and both displays in true/false but nothing helped. Finally I started playing around with the pico using the serial console and found the "set display" command. After switching it to "on", the display worked perfectly well. Maybe you could mention in the readme.md for the software at git, that the display default is "off". Maybe that saves someones time and nerves ;). Please consider this not as a critic but as a suggestion.
Best regards and greetings to Austria
Uli