## 7 Conclusions
\begin{table}
\begin{tabular}{l c c} \hline \hline
**Component** & **Quantity** & **Cost** \\ \hline Stepper Motor Nema 17 HS4401 & 6 units & USD 81.22 \\ Micro Switch KW11-3Z-2 & 7 units & USD 3.87 \\ Raspberry Pi 4 8 Gb RAM & 1 unit & USD 305.15 \\ Kit Keyboard and Mouse MK220 & 1 unit & USD 22.88 \\ Display 10 (HSD1001 fW1) in. and Controller & 1 unit & USD 54.47 \\ Board (M.NT68676.2) & 1 unit & USD 43.56 \\ Arduino Mega 2560 R3 & 1 unit & USD 42.84 \\ Arduino Uno R3 & 1 unit & USD 24.84 \\ DKV8825 Motor Driver & 6 units & USD 25.65 \\ Main Board PCB Single Layer FR4 & 1 unit & USD 1.90 \\ Secondary Board PCB Single Layer FR4 & 1 unit & USD 0.40 \\ Angle Board PCB Single Layer FR4 & 1 unit & USD 0.40 \\ Power Supply 12 V 10 A (S-120-12) & 1 unit & USD 7.63 \\ HC-05 Bluetooth Module & 2 units & USD 10.68 \\ Cooler Fan 40 \(\times\) 40 \(\times\) 10 mm AD0412 HB-G76-LF & 5 units & USD 13.92 \\ HW-203 SD Card Module & 1 unit & USD 4.18 \\ DC2158a Board & 1 unit & USD 543.62 \\ KMM36 RF Cable ThorLabs & 1 unit & USD 157.50 \\ Antenna (SMA Connector 1-1478968-0) & 1 unit & USD 3.82 \\ Flexible Coupler 5 \(\times\) 6 mm (AC-1925 AL) & 1 unit & USD 3.43 \\ GT2 Timing Pulley & 4 units & USD 11.07 \\ GT2 Bearing & 4 units & USD 15.05 \\ Timing Belt GT2 & 3.17 m & USD 6.02 \\ Thread Bar & 0.51 m & USD 2.33 \\ Acrylic 12 mm & 0.487 m\({}^{2}\) & USD 92.08 \\ Acrylic 6 mm & 0.172 m\({}^{2}\) & USD 16.28 \\ Acrylic 3 mm & 0.006 m\({}^{2}\) & USD 0.30 \\ ABS Plastic & 5.75 Kg & USD 98.68 \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Cost of each component of our instrument and the final total cost. **Acknowledgments:** We would like to express our sincere gratitude to the Electrical and Computer Engineering Department (SEL) of the Sao Carlos School of Engineering (EESC) at the University of Sao Paulo (USP). We would also like to acknowledge the research funding agencies CNPq and CAPES for their support of this work. **Conflicts of Interest:** The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript; or in the decision to publish the results. * (26) [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; et al. Hyperbolic Metamaterial Devices for Wavefront Manipulation. _Laser Photon Rev._**2018**, _13_, 1800081. [CrossRef]
* (27) [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON] Beam Manipulation Mechanisms of Dielectric Metasurfaces. _ACS Omega_**2019**, \(4\), 7467-7473. [CrossRef] [PubMed]
* (28) [PERSON]; [PERSON] _Principles of Nano-Optics_; Cambridge University Press: Cambridge, UK, 2012; ISBN 9781107005464. * (29) [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]; [PERSON]H.V. Highly Efficient Holograms Based on C-Si Metasurfaces in the Visible Range. _Opt. Express_**2018**, _26_, 9573. [CrossRef] [PubMed]  
**Disclaimer/Publisher's Note:** The statements, opinions and data contained in all publications are solely those of the individual author(s) and contributor(s) and not of MDPI and/or the editor(s). MDPI and/or the editor(s) disclaim responsibility for any injury to people or property resulting from any ideas, methods, instructions or products referred to in the content.