Keeratirawee, Kanchalar and Furter, Jasmine S. and Hauser, Peter C.. (2022) Low-cost electronic circuitry for photoacoustic gas sensing. HardwareX, 11. e00280.
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Official URL: https://edoc.unibas.ch/91953/
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Abstract
The circuitry comprises a sine wave generator based on direct digital synthesis, a laser diode driver module, a band-pass frequency filter, a synchronous detector with phase adjustment circuitry and a low pass filter to form an analog lock-in amplifier, and an analog-to-digital converter. A 32-bit ARM microcontroller programmed with the open source Mecrisp dialect of the Forth interpreter language is used to set the frequency, and read the data from the analog-to-digital converter. The circuitry is tethered via a serial interface to a personal computer. A graphical user interface written in Phython allows easy interaction with the microcontroller by sending the appropriate Forth commands. The data acquired is visualized and stored on the personal computer for further processing. The circuitry is easy to build as it is based on through-hole devices, except for two necessary surface mount items, which, however, still can be soldered with a fine tipped soldering iron. The performance of the circuitry was demonstrated by the photoacoustic detection of NO2 using a laser diode with a wavelength of 450 nm.
Faculties and Departments: | 05 Faculty of Science > Departement Chemie > Chemie > Analytische Chemie (Hauser) |
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UniBasel Contributors: | Hauser, Peter C. |
Item Type: | Article, refereed |
Article Subtype: | Research Article |
Publisher: | Elsevier |
ISSN: | 2468-0672 |
Note: | Publication type according to Uni Basel Research Database: Journal article |
Language: | English |
Identification Number: |
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edoc DOI: | |
Last Modified: | 11 Jan 2023 07:03 |
Deposited On: | 11 Jan 2023 07:03 |
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