Recently devices such as the optical mouse of a computer, webcams, Wii remote, and digital cameras have been used to record and analyze different physical phenomena quantitatively. Devices like tablets and smartphones are also becoming popular. Different scientific applications available at Google Play (Android devices) or the App Store (iOS devices) make them versatile. One can find many websites that provide information regarding various scientific applications compatible with these systems. A variety of smartphones/tablets are available with different types of sensors embedded. Some of them have sensors that are capable of measuring intensity of light, sound, and magnetic field. The camera of these devices has been used to study projectile motion, and the same device, along with a sensor, has been used to study the physical pendulum. Accelerometers have been used to study free and damped harmonic oscillations and to measure acceleration due to gravity. Using accelerometers and gyroscopes, angular velocity and centripetal acceleration have been measured. The coefficient of restitution for a ball bouncing on the floor has been measured using the application Oscilloscope on the iPhone. In this article, we present the use of an Android device as a low-cost alternative for a signal generator. We use the Signal Generator application installed on the Android device along with an amplifier circuit.

1.
O. R.
Ochoa
and
N. F.
Kolp
, “
The computer mouse as a data acquisition interface: Application to harmonic oscillators
,”
Am. J. Phys.
65
,
1115
1118
(
Nov.
1997
).
2.
T. W.
Ng
and
K. T.
Ang
, “
The optical mouse for harmonic oscillator experimentation
,”
Am. J. Phys.
73
,
793
795
(
Aug.
2005
).
3.
S.
Shamim
,
W.
Zia
, and
M. S.
Anwar
, “
Investigating viscous damping using a webcam
,”
Am. J. Phys.
78
,
433
436
(
April
2010
).
4.
S. L.
Tomarken
 et al, “
Motion tracking in undergraduate physics laboratories with the Wii remote
,”
Am. J. Phys.
80
,
351
354
(
April
2012
).

5.
J. A.
Monsoriu
,
M. H.
Gimenez
,
J.
Riera
, and
A.
Vidaurre
, “
Measuring coupled oscillations using an automated video analysis technique based on image recognition
,”
Eur. J. Phys.
26
,
1149
1155
(
Sept.
2005
).

6.
Wing-Kwong
Wong
,
Jia-Ming
Xu
and
Tsung-Kai
Chao
, “
Using Android mobile devices for physics experiments and inquiry
,”
Proceedings of the 19th International Conference on Computers in Education
(
Dec.
2011
).
7.
J. C.
Castro-Palacio
,
M. H.
Gimenez
,
J. A.
Monsoriu
, and
L.
Velazquez-Abad
, “
Using a mobile phone acceleration sensor in physics experiments on free and damped harmonic oscillations
,”
Am. J. Phys.
81
,
472
75
(
June
2013
).
8.
J.
Kuhn
and
P.
Vogt
, “
Smartphones as experimental tools: Different methods to determine the gravitational acceleration in classroom physics by using everyday devices
,”
Eur. J. Phys. Edu.
4
(
1
),
16
27
(
2013
).
9.
M.
Monteiro
,
C.
Cabeza
,
A. C.
Marti
,
P.
Vogt
, and
J.
Kuhn
, “
Angular velocity and centripetal acceleration relationship
,”
Phys. Teach.
52
,
312
313
(
May
2014
).
10.
M. A.
Gonzalez
 et al, “
Doing physics experiments and learning with smartphones
,”
Third International Conference on Technological Ecosystems for Enhancing Multiculturality – TEEM
(
Oct.
2015
).
11.
Lablet, Physics Experiments on Tablet
, http://lablet.auckland.ac.nz.
12.
Physics Central, Physics Buzz Blog (Your Smartphones Can Do Physics)
, http://physicsbuzz.physicscentral.com/2015/01/your-smartphone-can-do-physics.html.
13.
Android Apps for Experimenting with Measurement and Physics
, http://androinica.com/2012/01/android-apps-for-experimenting-with-measurement-and-physics/.
15.
Proceedings of the 46th International Physics Olympiad
2015
(
Homi Bhabha Centre for Science Education, Tata Institute of Fundamental Research
,
Mumbai, India
); http://www.ipho2015.in/downloads/IPhO-2015_Proceedings_web.pdf.
16.
Experimental Question of the International Physics Olympiad
1998
at
Reykjavik, Iceland
, http://ipho.org/problems-and-solutions/1998/IPhO_1998_Experimental%20Question.pdf.
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