DCF-77 PIC LED clock. This section will show you how to build this clock : PIC16F84 microcontroller 4 x 7 segments LED display Hours and minutes, or minutes and seconds are displayed, with a control button DCF77 atomic clock, automatic time set-up and make it run on a EasyPic development circuit board. The complete schematic, and the C language source code is freely provided ! 1. What is DCF77 ? DCF77 is the name of a german radio station on 77.5 KHz, which gives official time and date from an atomic clock located in Francfort. A simple and tiny receiver can catch the signal, from approximately 2000 kilometers around the antenna. There are many good web sites about DCF77, I strongly recommend to visit the official DCF77 web site : (German language) it contains all that you have to know about DCF-77. 2.
You don't need to build yourself a DCF77 receiver : there are ready-made, cheap modules to buy on internet, ask also your local dealer. 3. This is how I managed to build my circuit board : 4.
Frequence. 1-wire. Sound. IR. Motion Activated PC Monitor - radioetcetera. This page describes a method for turning on a computer monitor when motion is detected. At our local fire station there is a monitor in the truck bay that displays some real-time status information from a web page. Since it's a volunteer fire department, most of the time there is no one there to view the information. However, when an emergency call is received, it's important that the information be visible without the need for firefighters to waste time turning on a monitor. Leaving the monitor on all the time leads to LCD burn-in, which is also undesirable. To achieve the goal of a motion-activated monitor, an inexpensive PIR motion detector, a USB mouse, a 10k resistor, and a 2N3904 transistor were used. A further refinement would be to use a microcontroller to emulate a USB keyboard to send a keypress of an unused key (such as scroll lock) so that accidental mouse clicks aren't a concern. PIR Motion Sensor USB Mouse Usage Build Pictures Top view of mouse modifications: Finished Product:
Humidité. Home. Courants. Poids. SAWA - M-ITI Wiki. From M-ITI Wiki System overview SAWA can be considered as a platform, with a set of services and an web front end. It uses XMPP Protocol to transport all sensor data in real-time with secure connections. Using XEP-060, Publisher-Subscribers paradigm in XMPP, is possible to share data with multiple users with flexibility and scalability. This project uses soxlib(sensor schema extension)with modifications from Sensor Andrew project, in the services and tools.
Project blog , Project source , Project Wiki , Online demo Developer Salvador Faria salvador.mrf@gmail.com Web application In web application is possible to manage networks, sensors, parameters and XMPP nodes; define policies based on rules; share sensor data; export data and visualize sensor data in graphs. -Technologies Google Maps, Dygraphs, Open Flash Charts 2, jQuery, Ajax, JSON, CSV, XML, JavaScript, Openfire Css, CodeIgniter, PHP, C, MySQL Services -Datarecorder Is a service responsible to recording sensor data in database. -Actionchecker.
Distance. Middleware solution for real-time sensing. Rotation. Gaz, polluants, radioactivité. Temperature. Remplissage cuve. Météo. Présence. Scanner 3D.