Circuits & Schematics Wireless - 7

Overview The “Simple Wireless Security System” monitors the open/closed state of two (garage) doors. Sensors detect the state of the doors, and a Zigbee wireless transceiver sends the state information to a PC. The PC runs a GUI ...

Introduction How many times you needed some remote control to handle some electric device ? many times. There are lot of remote controls like infrared, RF, SMS (like my other circuit) and more. The basic small-range remote controls are 2, Infrared ...

Here is my home-built, cloth iron soldered, range extender for CC1101 (included onboard) RF transceiver chip from Texas Instruments. You could say that it is a CC1101+ CC2591 , but for 868/920MHz band. I used MAX2233 RF amplifier from Maxim-IC. It ...

John Samin The original diode in the Microwave detector has been hard to find. I have found a supplier for the diodes... Purchased here: http://www.xs4all.nl/~barendh/Cateng/Cateng_diode.htm Site Main Page : ...

Jerry Wasinger I. Introduction In the Midwest, the main topics of conversation may include the local football team or how the crops are doing. Inevitably though, the conversation always leads to the weather. Most of us take the weather for granted ...

Features so far Displays menu via serial port if attached to PC Can run unattended or interactively for debugging Fetches GPS positions and sends them via SMS every two minutes If the circuit is powered on, the following sequence will be executed: ...

This post will show you, how to use this equipement to send an SMS with your current position and how to display it in Google Maps. How does it work? The controllers serial port is attached to the serial port of the GM862 module. This way the ...

My goal is to build a kind of a mobile tracker. There are many different use cases you can think of but one of the obvious is a device, that is able to report where it is. This device can be put in your car and it could trigger an alarm, if the car ...

In this Instructable I will describe different ways to block or kill RFID tags. RFID stands for Radio Frequency Identification. If you do not know about this technology yet, you should definitely start familiarizing yourself with it, because the ...