If you want to build a good Real Time Clock for your Raspberry here’s the tutorial you were looking for! This is a revised and simplified version for Instructables made out of this article at my personal blog. Difference is mainly in the structure and my article is a bit more verbose. Why another “annoying” […]
An elegant, stacking, Real Time Clock for Raspberry Pi Read More »
This instructable shows how to use a ‘Simple but Strong Plastic Box’, (http://www.instructables.com/id/A-Simple-but-Strong-Plastic-Box/) from my previous Instructable, to make a Two Faced Clock which uses a Raspberry Pi to control two stepper motors. I’ll not explain how to make the box itself, but will show how to measure, mark and make the holes for the
A Raspberry Pi Controlled Two Faced Clock Read More »
I’ve been intending to try driving Switec X25.168 motors using the MCP23008 I²C I/O port expander chip from an Arduino, but it occurs to me that it might be more interesting to try this on a Rasberry Pi. If it works, it will demonstrate a simple and very inexpensive method for driving analog gauges from
Analog Gauges Using I²C on the Raspberry Pi Read More »
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
Adding a Real Clock Time to your Raspberry PI Read More »
To keep the price of the raspberry pi down the developers left out some of the essentials one of those is the real time clock. At the moment the raspberry pi gets it time over the Ethernet from updating the time automatically from the global ntp (nework time protocol) server, but this means that when the Ethernet is unplugged
For this to work you must obviously live in an area that can receive both signals. My circuit is based on two modules taken from two radio clocks bought at Lidl’s supermarket. Originally both were for the DCF clock but by substituting the original 77.5kHz crystal with a 60kHz crystal, one of the modules was
A combined MSF/DCF atomic clock receiver Read More »
Instructions for employing a Raspberry PI as a water alarm system Version 1.0, published in Jan 2015 The Raspberry Pi reads the status of one or two water sensor device(s) on one or two of its GPIO pins. When water is detected the Raspberry Pi emails out an alert to a recipient group and calls
Raspberry Pi water alarm system Read More »
Hello guys In this instructable i’ll show an alarm clock project based on RaspberryPi and GrovePi+ Starter Kit. Its name is “IT”, that’s the shortening of “It’s Time”. Version instructabled is 1.3, youtube video shows 1.0 . It’s a standard alarm clock that can be configured at your pleasure. Once you have completed this project,
IT – RaspberryPI alarm clock Read More »
Reliable Projects 1: WatchDog Timers for Raspberry Pi and Arduinos Summary: In this series of postings we look at how to set up the Raspberry Pi and Arduino internal watchdog timers. We also explain why an external WatchDog Timer, such as the SwitchDoc Labs Dual WatchDog Timer is a better choice in many, but not all, systems. Part
Reliable Projects 1: WatchDog Timers for Raspberry Pi and Arduinos Read More »
I spotted a post by Lior Hass on Hackaday a little while back where he described his Alarmino project where his alarm system now connects with an Arduino and a custom board to simulate the phone line and interpret Contact-ID protocol. He could then get the system to SMS him in the case of an alarm. In
Retransmitting Alarm System State Changes with Raspberry Pi and Arduino Read More »
