Frequency Spectrum Analyser using Arduino Controller display on OLED

Abhijit C. Bandewar1, Samiksha S. Fulambarkar2, Rhushikesh B. Bangde3, Harsha C. Jawane4, Dr. Rahul A. Burange5
1,2,3,4Student, Department of Electronics Engineering, K.D.K.C.E, Nagpur, India
5Assistant Professor, Department of Electronics Engineering, K.D.K.C.E, Nagpur, India

Abstract:

In Engineering field and in any other technical field frequency spectrum analyser are majorly used. So in this way we are made freely handheld, small in size and low power consumption device. We are put a completely new approach of analysing signal in frequency domain. In this new technique, we are using Arduino UNO Controller, OLED display and microphone. We are presenting the human voice and any other voice by using microphone and then analysing and display on OLED display in the form of spectrum.

Keywords – Arduino, OLED (Organic Light Emitting Diode), Microphone

1.Introduction:

Frequency Spectrum Analyser through OLED display using Arduino Controller this device is small in size and low power consumption of such devices offers noticeable advantages over any conventional measuring device giving us opportunities to make use of them in the field of Engineering and in any other technical field. In this paper we are proposed a Spectrum Analyser for general purpose spectrum analysis of audio frequency by using microphone. Some spectrum analysers have integrated functions like modulation decoding and radio frequency signal generation. Modern spectrum analysers use digital techniques to combine and reduce the hardware.

2. Block Diagram

2.1 Components are used and represented in the form of Block Diagram:

In this block diagram there are total four major blocks:

1. ARDUINO UNO Controller
2. Microphone Sensor
3. OLED Display
4. Power Supply

ARDUINO UNO Controller –Arduino is a ATmega328 microcontroller device. It has 5V operating voltage, 7-12V input voltage, this is recommended. It has 14 digital Input/Output pins and 6 analog input pins. Arduino has 32KB of which 0.5KB used by bootloader flash memory. It has 40mA DC current per I/O pins and 50mA DC current for 3.3V pin. It has 2KB SRAM, 1KB EEPROM and 16MHz clock speed. Arduino UNO powered by USB connection or an external power supply, power source is automatically selected. External power can come from AC to DC adapter or battery. The adapter connected plugging by 2.1mm centre positive plug into the board’s power jack. The Arduino UNO is used for communicating with computer [2].

Microphone Sensor – Microphone is used for recording the human voice and converts to the spectrum then present on OLED display. Characteristics of microphones such as frequency response, frequency range, dynamic range and directionality [3].

OLED Display –OLED has emissive electro luminescent layer is a film of organic compound which emits light in reaction to an electric current [4]. OLED are used to make digital displays in devices such as television screens, computer monitors, portable systems such as mobile phones [5].

Power Supply – The ARDUINO UNO Controller can be powered by the USB connection or with an external power supply. External power come either from an AC-to-DC adapter or battery [2]. The board can operate on an external power supply of 6 to 20 volts. If the power supplied with less than 7V, hence, the 5V pin may supply less than 5V and the board may be unstable. If you are using more than 12V, the voltage regulator may overheat and damage the board. The recommended range is 7 to 12 volts. The power pins are as follows:

• VIN – The input voltage to the Arduino board when it’s use as an external power source. You can supply the voltage through VIN pin or, via the power jack.
• 5V – This pin outputs a control 5V from the regulator on the board. The board can be power supplied either from the DC power jack (7 – 12V), the USB connector (5V), or the VIN pin of the board (7-12V).
• 3V –A 3V supply generated by the on-board regulator.
• GND –Ground Pins.

2.2 Block Diagram of Components of typical linear Power Supply:

The electrical power is almost excepting produced, converted and distributed in the form of ac signal because of sparing consideration but for operation of most of the electronic devices and circuits, dc supply is required. Mostly all electronic equipment includes a circuit that converts ac supply into dc supply. From the block diagram, the basic power supply is consti¬tuted by four elements: a transformer, a rectifier, a filter and a regulator.

• Transformer Transformeris used to step-up or step-down the-supply voltage as per need of the solid-state electronic devices and circuits to be supplied by the dc power supply. It can provide separation from the supply line an important safety consideration. It may also include internal protection to prevent unusable electrical noise signal on the power line from getting into the power supply and possibly disturbing the load.
• Rectifier – Rectifier – is used to step-up or step-down the-supply voltage as per need of the solid-state electronic devices and circuits to be supplied by the dc power supply. It can provide separation from the supply line an important safety consideration. It may also include internal protection to prevent unusable electrical noise signal on the power line from getting into the power supply and possibly disturbing the load.
• Filter – In signal processing, a filter is an electronic device or process that removes some unwanted components or features from a signal. Filtering is a class of signal processing, the defining special feature of filters being the complete or deficient constraint of some aspect of the signal. Filters are used in electronics and telecommunication field, it is also used in radio, television, audio recording, radar, music synthesis, image processing and computer graphics.
• Regulator – In automatic control, a regulator is an electronic device which has the function of causing a designated characteristic. It performs the activity of managing a range of values in a machine. The mensurable property of a device is managed closely by specified conditions or an advance set value. It can be a variable according to an established arrangement scheme. It can be used generally to implicate any set of various controls or devices for regulating or controlling items or objects.

3. Advantages

1. It features high testing sensitivity, light weight, freely handheld device, smaller in size and portable design.
2. It allows testing and measurement can be performed user-friendly.
3. With excellent performance, testing and measurement requirements of the majority of RF signal.

4. Applications of Spectrum Analyser

1. Hunting and spectrums.
2. Broadcast transmitter analysis.
3. Interference Satellite system monitoring.

5. Conclusion

From the past years we are using frequency spectrum analyser in Engineering field and in any other technical field, it consumes more power and voltage, which they lost huge amount of energy. So in this way we are made freely handheld, small in size and low power consumption device. We are put a completely new approach of analysing signal in frequency domain. In this new technique, we are using Arduino UNO Controller, OLED display and microphone. So in this way analysing any voice by using microphone and display on OLED display in the form of spectrum.

References

1. A. Bandewar, S. Fulambarkar, R. Bangde, H. Jawane and R. A. Burange, “Frequency Spectrum Analyser through OLED Display using Arduino Controller”, in International Research Journal of Engineering and Technology, vol. 7, no. 2, February 2020.
2. ARDUINO.CC, “Arduino – Introduction”, 2015 [Online] Available: http://arduino.cc/en/Guide/Introduction. ERTCONV5IS23005.
3. Y. Tomita, C. May, M. Törker, J. Amelung, M. Eritt, F. Löffler, C. Luber, K. Walzer, K. Fehse, Q. Huang, and K. Leo, “PIN type OLEDs for lighting applications on ITO and ZAO”, Proc. EOS conference on Trends in Optoelectronics, 36, World of Photonics Congress
4. J. Amelung, M. Toerker, Y. Tomita, D. Kreye, C. Grillberger, U. Vogel, A. Elgner, M. Eritt, Ch. May, U. Todt, C. Luber, R. Hermann, Ch. Zschippang, and K. Leo, “Integration of high-efficiency PIN organic light-emitting devices in lighting and optoelectronic applications”, Proc. SPIE, 6486, 64860C
5. The ABC’s of AKG: Microphone basics & fundamentals of usage: Nashville, TN, AKG, Acoustics, US.
6. Wei-Meng lee, “Beginning Android Applications Development”. (Wiley publication. Inc.)
7. Sayeed Y. Hashimi and Satya Komatineni, “Pro Android”. (Apress publication).
8. W. Lowdermilk, F. Harris, “Cost effective, versatile, high performance, spectral analysis in a synthetic instrument,” in AUTOTESTCON, IEEE, pp. 148 –153
9. Barnoski, M.K., Chen, B.U., Joseph, Thomas R., Lee, J. ” Integrated-optic spectrum analyzer” circuits and systems, IEEE Transactions. Vol. 26, Issue No.12
10. Onur Cinar, “Android apps with Eclipse”. (Après publication)