You're reading from DIY Microcontroller Projects for Hobbyists

Product typeBook

Published inJul 2021

Reading LevelBeginner

PublisherPackt

ISBN-139781800564138

Edition1st Edition

Languages

Tools

ARM Cortex

Concepts

Microcontroller

Authors (2):

Miguel Angel Garcia-Ruiz

Pedro Cesar Santana Mancilla

View More author details

Testing the visual alarm

In this section, we will focus on how to test the super-bright LED, as well as how to test the speed of the SOS message shown by the LED.

You can test the super-bright LED to establish whether it works OK with a power supply, as shown in Figure 6.10:

Figure 6.10 – Connecting the super-bright LED to a battery set

The following are the steps for connecting everything according to Figure 6.10:

Connect the super-bright LED's anode (its longest leg) to a 1 k ohm resistor.
Connect the resistor to the battery set's positive terminal. The battery set should provide around 3 V (supplied by two AA batteries), which are enough for testing our super-bright LED.
Connect the battery set's negative terminal to the super-bright LED's cathode (its shortest leg).

After connecting everything as per the preceding steps, the LED should glow. If not, check the LED polarity, and whether the batteries...

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DIY Microcontroller Projects for Hobbyists

Published in: Jul 2021Publisher: PacktISBN-13: 9781800564138

Authors (2)

Miguel Angel Garcia-Ruiz

Miguel Angel Garcia-Ruiz is an Associate Professor of Computer Science at the School of Computer Science and Technology, Algoma University, Canada. He has taught microcontroller programming and interfacing, human-computer interaction, and interaction design courses. Miguel has a PhD in Computer Science and Artificial Intelligence from Sussex University, England. He has published articles on tinkering with technology applying microcontroller boards. Miguel has conducted research projects funded by Canada's Northern Ontario Heritage Fund (NOHFC), Algoma University, and the Mexican Ministry of Education.
Read more about Miguel Angel Garcia-Ruiz

Pedro Cesar Santana Mancilla

Pedro Cesar Santana Mancilla is a research professor at the School of Telematics at the University of Colima in Mexico. His research interests focus on human-computer interaction, ICT for elderly people, Internet of Things, and machine learning. He is currently serving as president of the Mexican Association on Human-Computer Interaction (AMexIHC). He is a Senior Member of the IEEE, and ACM and serves as Chair of the Mexican ACM SIGCHI Chapter (CHI-Mexico). Pedro is a member of the Mexican Academy of Computing (AMexComp) and the Mexican Society of Computer Science (SMCC).
Read more about Pedro Cesar Santana Mancilla

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