====== piSpectro Spectrometer ======
//This project **piSpectro** is based on **PySpectrometer** and provides a more detailed alternative mounting solution than the original project. The focus is on developing entirely new software based on **PyQt**. The original software **PySpectrometer** (version 2) remains usable.{{ :logo-no-frame-2.png?400|}} //

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[[pispectro_en|🇬🇧 English]] | [[0x0019|🇩🇪 Deutsch]]
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Download [[http://pispectro.softure.de/pispectro-0.9.11.zip| piSpectro]]

**[[pispectro-installation-en|Installation guide]]**
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===== Feature List - piSpectro Software =====
  * Raspberry Pi camera analysis  
  * Video and image analysis  
  * Export of images, spectra, and parameters  
  * Spectrum calibration  
  * Reference databases  
      * Reference spectra  
          * MILES database  
          * Solar spectra  
      * Element spectra  
          * Lines from NIST service  
  * Personal database  
      * Continuous spectra  
      * Line spectra  
  * German/English version available  
  * Analysis  
      * Production of continuous and normalized spectra  
      * Range analysis and measurement tools  
    * Easy update – 1‑click via the menu  

^ **<color #00a2e8>pi</color><color #22b14c>Scec</color><color #ffc90e>tros</color><color #ff7f27>co</color><color #ed1c24>pe</color>**  //Raspberry Pi–controlled spectroscope for displaying light spectra//^
|{{ :pispectro-hardware.png?600 |}}|
|The holder includes a spectroscope (with protective cap), a Pi camera with zoom lens, and an HDMI connection for the Raspberry Pi.|

<WRAP center round tip 90%>//**PySpectrometer** is an open‑source DIY project combining a Raspberry Pi and a spectroscope with a custom holder. The goal is to provide an affordable and accessible means for spectral analysis. The Raspberry Pi acts as the central control unit for capturing, processing, and displaying spectra.//

☛ Project idea:
  * https://github.com/leswright1977/PySpectrometer
  * https://github.com/leswright1977/PySpectrometer2

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====== Hardware ======
++++ Hardware list |

^ ^Description^
|**Hand spectroscope**{{ :spektroskop-hand.png?400 |}}|<WRAP>
//Manufacturer: Paton Hawksley Education Ltd., 17 Ashmead Business Park, Ashmead Road, Keynsham, BS31 1SX Bristol,// 
  * Slit width: 0.2 mm  
  * Grating: 600 lines/mm  
  * Dimensions: 105 × 25 mm (L × D)
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|**Pi, case, and camera⇔HDMI adapter**{{ :raspi-gehaeuse.png?400 |}}|<WRAP>
          * Pi 4 (8 GB)  
          * 64 GB SSD  
          * Power supply (3 A – 15 W – Pi 4)  
          * Adapter Pi-camera cable to HDMI, mounted here  
          * Gelid Solution ICEBERRY Raspberry cooler – integrated heatsink + fan – very quiet operation – Raspberry Pi 4 Model B – 91 × 62 × 33.5 mm – silver  
Cooling: The continuously running 5 V fan is very loud :-/.
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|**Fan control**{{ :wiki:raspi-fan.png?400 |}}|<WRAP>
**Cooling:** The 5 V fan runs constantly and is very loud. An **emitter circuit** with transistor and resistor solves this.

There’s space in the case for a **1 kΩ resistor** and a **BC548B transistor**, allowing for regulated fan control via GPIO pin 14.

**Setup:** Using `raspi-config`, configure pin 14 to activate based on temperature (e.g., from 75 °C) to control the fan.

☛ The fan is now off most of the time, so everything is very quiet. =)
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|**HDMI cable**|e.g. 3 m length (or 5 m) |
|**Camera⇔HDMI adapter**{{ :raspi-hdmi-adapter.png?400 |}}|<WRAP>Using the camera‑to‑HDMI adapter lets you swap the wide, delicate Raspberry Pi camera cable for a standard HDMI cable.
  * PCB adapter Raspberry Pi‑Camera to HDMI  
      * 2‑pack HDMI to CSI extension adapter for Raspberry Pi camera module with 5 cm FFC flat cable  
  * 4× M2 screws  
  * M2 brass spacers
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|**Raspberry Pi camera**{{ :wiki:rpicamerasize.jpg?400 |}}|<WRAP>
  * Raspberry Pi Camera B Rev 2.0  
      * Waveshare Raspberry Pi Camera (B), OV5647 adjustable-focus 5 MP FFC (e.g. Eckstein shop)  
  * 4× M1.6 and 2× M2 screws  
The 12 MP has __lower__ resolution!  //Don’t confuse pixel count with pixel size//
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|**Zoom F1.6 lens**{{ :zoom16.png?400 |}}|<WRAP>
  * Remove existing lens and replace with this:  
  * 6–22 mm 5 MP varifocal lens, manual zoom, high-definition  
          * M12 mount thread  
          * F1.6  
          * 6–22 mm 5 MP M12 mount varifocal lens, manual zoom, high-definition network lens for 5 MP security cameras without filter (e.g. Amazon, eBay)
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|**Spacers**{{ :m2-abstandhalter.png?400 |}}|<WRAP>
A spacer set (here M2), felt pads, and screws (we need M1.6, M2, M3) should be part of any maker toolkit.
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====== Spectroscope Mount ====== 
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The goal is to create a **stable** mount for the spectroscope in front of the Raspberry Pi camera with zoom lens.
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++++ The spectroscope mount is manufactured using a 3D printer and CNC milling. |
|**Sketch: Mount assembly**  |
|{{ :wiki:scope-rohfassung.png?600 |}}|
|{{ :spectro-skizze.png?600 |}}|
|Sketch with dimensions in mm.|

The dimensions were determined for our printer ;-)
^Type^Designation^Description^
| CNC | **Camera holder**{{ :spectro-camholder-1.png?200 |}}|<WRAP>
  * **ALU 8 mm** ''AlMg4,5Mn EN AW-5083, F 28''  
  * Bottom:  
          * 2× 2.5 mm holes → M3 thread to be tapped manually  
          * Spacing: 37.0 mm  
  * Front: <color #00a2e8>4× 1.8 mm holes</color> → camera holder

<color #c3c3c3>Alternatively, the camera holder can be 3D-printed. The bottom holes should be 4 mm for M3 threaded inserts.</color>
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| CNC | **Base plate**{{ :spectro-bodenplatte.png?200 |}}|<WRAP>
  * **ALU 6 mm** ''AlMg4,5Mn EN AW-5083, F 28''  
  * Length: 208 mm, Width: 50 mm  
  * <color #99d9ea>2× 3 mm holes</color> → for the spectroscope holder (spacing 23 mm)  
  * <color #99d9ea>2× 3 mm holes</color> → for the camera holder (spacing 37.0 mm)  
  * <color #00a2e8>4× 2 mm holes</color> → for the camera‑HDMI adapter  

Screws on the underside don’t need countersinking since felt strips on the bottom act as protection and provide the required spacing.

<color #c3c3c3>The base plate should ideally be aluminum for stability. If no CNC router is available, you can source 50 mm wide aluminum sheets from various suppliers. The QCAD DXF file can be printed as a template for pre‑drilling holes. The holes can then be drilled manually. Alternatively, the base plate may also be made from wood.</color>
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| 3D-Print | **Cap**{{ :spectro-kappe.png?250 |}}|<WRAP>
  * Cap diameter: 24.8 mm  //(to prevent the cap from falling out!)//
☛ Serves as a dust cover—essential to protect the optics, since none is provided!
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|3D-Print|**Spectroscope bracket**{{ :sope-cameraholder.png?250 |}}|<WRAP>
  * Spectroscope print diameter: 25.2 mm //(due to the sticker)//  
      * M3 hole spacing: 23 mm //(important for the base plate)//  
      * Thread inserts  
              * M3 pilot hole: 4 mm (for PLA)  
              * M5 pilot hole: 6.3 mm (for PLA)  
      * M5 thumb screw
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|3D-Print|**Camera cover**{{ :spectro-camera.png?250 |}}|<WRAP>
  * Optional, but recommended.  
  * Inner hole: ø 15.3 mm  
  * 2× M2 – uses the camera’s mounting holes to attach the cover.
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|3D-Print|**Cover: HDMI‑Camera Adapter**{{ :spectro-hdmi.png?250 |}}|<WRAP>
  * Optional, but recommended.  
  * 4× M2
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++++
====== Software ======
  * ''PySpectrometer'' (open‑source project for testing/use)  
  * ''piSpectro'' (own open‑source software)  

===== Gallery =====
 * [[piSpectro Galerie]]
===== Tutorial =====
  * [[Getting Started with piSpectro]]
  * [[Calibrating a Spectrum]]
  * [[Using Reference Databases]]
  * [[First Steps in Spectrum Analysis]]
====== Downloads ======
  *  {{ :scope-v1.zip | Spectroscope CAD}}
          * Contains all FreeCAD/STL files as well as QCAD files for manufacturing.