How To Make Arduino Adjustable Countdown Timer with 7Segment Display | without RTC Countdown Timer
Things used in this project
Hardware components
HARDWARE LIST
1 Arduino UNO
1 SparkFun 7-Segment Serial Display - Red
3 DFRobot Gravity:Digital Push Button (Yellow)
1 Relay Module (Generic)
1 Male/Male Jumper Wires
1 Male/Female Jumper Wires
1 LED Light Bulb, Frosted GLS
1 Buzzer
1 Test Accessory, AC Power Adaptor
Software apps and online services
Arduino IDE
Story
How To Make Arduino Adjustable Countdown Timer with 7Segment Display | without RTC Countdown Timer
Custom parts and enclosures
Components
Components Details () {
Solderless Breadboard,
Arduino Uno,
4 Digit Multiplexing 7Segment Display,
Push Button x 3,
Buzzer,
1-Channel 5v Relay Module,
Male to Male Jumper Wires,
Male to Female jumper Wires,
Bulb Holder,
220v LED Bulb,
5v 2Amp Power Adapter
}
Schematics
Schematics and circuit diagrams
Proteus Simulation
Code
Countdown_Timer_With_7Segment-main.zip The article was first published in hackster, September 7, 2021
cr: https://www.hackster.io/embeddedlab786/arduino-adjustable-countdown-timer-with-7segment-display-15488a
author: Muhammad Ansar
License 
All Rights
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