Tag Archive: 74HC595


Arduino: Security Alarm System.

Filed under: Embedded Systems, Projects, Security Systems & Access Control — Leave a comment
March 25, 2015

This project refers to a Security Alarm System implemented with Arduino and various electronics.

Below, are some of the system characteristics:

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Arduino: Game for Reinforcing Visual Skills.

Filed under: Electronic Games, Embedded Systems, Projects — Leave a comment
August 30, 2010

This project refers to an Arduino sketch that implements a game for reinforcing visual skills. Basically, it is a reflex game. It can be played by a user (single-player) or multiple users simultaneously (multi-player). Each player holds a button. The system turns on and off the appropriate LED at pseudorandom times. The players have to click their button as fast as possible in order to earn points.

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Arduino: Digital Indicator of Alcohol Content.

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August 29, 2010

This project refers to an Arduino sketch that implements the logic of a digital indicator of alcohol content. This system can be used as a device for breath test. There is the MQ-3 sensor in the system to detect alcohol. A suitable multi-LED bar graph (which is driven by a 8-bit shift register 74HC595) is used as an indicator rating the alcohol content. If the alcohol content is high, then a tune is produced through a suitable piezo speaker. Finally, there are two buttons in the system for functions such as ON, OFF and a LED which is the operation indicator.

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Arduino: Light Indicator with multi-LED bar graph, light sensor and 8-bit shift register 74HC595.

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June 29, 2010

This project refers to an Arduino sketch that implements a light indicator with the help of an external sensor (photoresistor) for the recognition of light (the sensor acts as input device for the Arduino), and a bar graph of many LEDs used as a rating indicator (the indicator functions as an output device for the Arduino).

In this project we use an 8-bit shift register (namely the 74HC595). This way we can drive 8 different LEDs in the output committing only three PINS of the Arduino.

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Arduino: LEDs animations controlled with a button and a 8-bit 74HC595 shift register.

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This project refers to an Arduino sketch which is used to produce LEDs animations. So, we use an 8-bit shift register (namely the 74HC595). This way we can drive 8 different LEDs in the output committing only three PINS of the Arduino.

If we want to drive more LEDs, we connect into a cascade form two or more (depending on the number of LEDs we want to support) shift registers and act accordingly.

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