Adding a Real Clock Calendar to your Raspberry PI

The Raspberry Pi doesn’t have a little coin-battery-powered ‘Real Time Clock’ (RTC) module, which keeps time even when the power is off, or the battery removed. To keep costs low and the size small, an RTC is not included with the Raspberry Pi. If your Raspberry Pi is connected to the Internet via Ethernet or WiFi, the time/date will be automatically updated from the global ntp (nework time protocol) server ...

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Make an alarm clock with a Raspberry Pi

Breadboard If you’re new to electronics and the Raspberry Pi (RPi), you might not be familiar with the breadboard. The idea of the breadboard is to allow you to connect up electrical components without needing to solder wires or any other elaborate procedure. It’s basically a grid with many holes, into which you can plug jumper wires, and build circuits. A must requirement for anybody recently getting a RPi ...

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How to Use Timer in Raspberry Pi

The Raspberry pi is a device which uses the Broadcom controller chip which is a SoC (System on Chip). This SoC has the powerful ARM11 processor which runs on 700 MHz at its core. This powerful processor and the controller having the peripherals like timers, interrupt controller, GPIO, PCM / I2S, DMA controller, I2C, SPI slave, PWM, UART, USB, graphical processing unit (GPU) which includes VideoCore, MPEG-2 ...

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Social Alarm Clock

Authors: Alexandru Radovici, Ioana Culic, Maria Tudor - Wyliodrin Bogdan Doinea - Cisco Networking Academy This document describes how to build a Social Alarm Clock by a team of five people: a manager, a product designer, two engineers and a programmer. Introduction We are going to make a smart wake up lamp. You should already be grouped in teams of five. If you are more than 5, feel free to assign a techni ...

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Running an Nginx, PHP, and MySQL Webserver on the Raspberry Pi

For my project, I am going to be hosting a website on the Raspberry Pi. I want to be able to set the alarm on the alarm clock through the website and have the C++ program interact with the MySQL database to get alarm times. Many websites are hosted using Apache, but since Apache can be a bit of a resource hog, I decided to use Nginx. There are several articles out there that explain how to set up these serv ...

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Raspberry Pi Time Clock

This build combines a Raspberry Pi with a rotary-encoder, an RGB LED and an OLED character display to create a time clock that logs my time on tasks directly to a Google Docs spreadsheet. Motivation Whenever I have to record time against projects, I find it really hard to diligently keep my time records up to date. Maybe with a purpose-built time clock I will keep better records? Hey, it could happen! Overv ...

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Raspberry Pi and Arduino: Building Reliable Systems with WatchDog Timers

Summary: In this Instructable we look at how to build more reliable computer systems using WatchDog timers. We show how to set up and use the Raspberry Pi and Arduino internal watchdog timers. We also explain why an external WatchDog Timer is a better choice in many, but not all, systems. See more on WatchDog Timers in Solar Power applications on www.switchdoc.com. Step 1 - Introduction to WatchDog Timers S ...

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My Raspberry Pi Pool Timer — Electronic Assembly

I used to do many projects like this as a teenager, an eternity ago as it seems. One thing I learned the hard way is to always, always, assemble projects gradually, starting with the power. If the power is wrong, in the best case, you get really befuddled about what is going on, and in the worst case, you have to reorder every single part you just fried. (May include yourself ;-)) And reassemble everything ...

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Raspberry Pi PCF8563 Real Time Clock (RTC)

Having recently received my Raspberry Pi, one of the first things I wanted to do was hook up a real-time clock chip I had lying around (a NXP PCF8563) and learn how to drive I2C from the BCM2835 hardware registers. Turns out it’s quite easy to do, and I think makes a useful project to learn with. So, here are some notes I made getting it to work, initially with Chris Boot’s forked kernel that incorporates s ...

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An MSF Atomic Clock for the Raspberry Pi

The project is connected to GPIO 15 input pin 1 of my Raspberry Pi interface board. There is nothing special about this pin, its location is simply convenient with my layout.. Please be aware that this project will only work in the British Isles, because the transmitter is not very powerful. The antenna should be aligned with Anthorn, which is a place more or less in the middle of Britain. Here in Northern ...

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