The document describes an electronic voting system that consists of two units: a voting unit and a counting unit. Both units contain a microcontroller, GSM module, and LCD display. The voting unit allows users to cast votes for different candidates that are then sent to the counting unit via the GSM module. The counting unit tabulates the votes received and displays the current vote totals for each candidate on the LCD screen. Diagrams show the electrical connections between the components in each unit including the Arduino board, GSM module, and LCD shield. References are provided at the end related to electronic voting systems, sending/receiving SMS using GSM modules, and using Arduino microcontrollers.

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2. ARDUINO UNO BOARD
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3. SIM300 GSM MODULE
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4. 16X2 LCD SHIELD
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16X2 LCD

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It has two units;
1. Voting Unit
2. Counting Unit

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CANTIDATE A
CANTIDATE B
CANTIDATE C
CANTIDATE D
MICRO CONTROLLER
GSM MODULE
(SIM300)
VOTING UNIT

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COUNTING UNIT
MICRO CONTROLLER
GSM MODULE
(SIM300)
DISPLAY
CANTIDATE A
CANTIDATE B
CANTIDATE C
CANTIDATE D

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LEG 1
LEG 3
LEG 2
LEG 4

11. VOTING PANEL
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D6
D7
D8
D9
10K
10K
10K
10K
+5V GND

12. CONNECTING LCD SHIELD TO ARDUINO BOARD
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COUNTING UNIT

13. CONNECTING MODULE TO ARDUINO BOARD
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COUNTING UNIT

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COUNTING UNIT

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COUNTING UNIT

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1. An Electronic Voting System Using GSM Mobile Technology -Yang Feng,
Siaw-Lynn Ng and Scarlet Schwiderski-Grosche (Technical Report
RHUL–MA–2006–5
26 June 2006)
2. http://extremeelectronics.co.in/avr-tutorials/sending-an-receiving-sms-
using-sim300-gsm-module/
3. Arduino Microcontroller Guide W. Durfee, University of Minnesota ver.
oct- 2011

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