SmartHub100

  In this post we learn through two examples how to build a simple light dimmer switch circuit for controlling light intensity with pot, using the principle of triac phase chopping. What are Triac Dimmers We have already seen in many of my earlier articles how triacs are used in electronic circuits for switching AC loads. Triacs are basically devices which are able to switch ON a particular connected load in response to an external DC trigger. Though these may be incorporated for complete switch ON and complete switch OFF procedures of a load, the device is also popularly applied for regulating an AC, such that the output to the load may be reduced to any desired value. For example triacs are very commonly used dimmer switch applications where the circuit is designed to make the device switch in such a manner that it conducts only for a particular section of the AC sine wave and remains cut OFF during the remaining parts of the sine wave. This result is an corresponding output AC which

AC DIMMER USING M0C3021.   I'd been messing around with low DC voltage projects for some time so wanted to experiment a bit with AC dimming controlled by a microcontroller. This experiment was with phase control (as opposed to voltage modulation). The idea is that you detect when the AC phase crosses zero volts (zero cross) at which point the triac in the circuit remains off for a certain period of time and is then turned back on by the microcontroller.  The longer it remains off then the less power the AC circuit gets and thus is more dim. Theres lots of info online about the theory of all this.  E.g.  AC Phase Control . I looked around quite a bit online at various people having done the same sort of thing.   Here's one .  If what I did looks similar to someone elses work then chances are I had a look at it.  I also got some input from various sources.  My thanks to those people! :) Here's the circuit I made for it: And the board that I made based on the circuit: Back of

  Whether you want to listen to what happens in your house that’s miles away from you or activate sprinkler system in your garden just with a silent call; Then SIM800L GSM/GPRS module serves as a solid launching point for you to get you started with IoT! SIM800L GSM/GPRS module is a miniature GSM modem, which can be integrated into a great number of IoT projects. You can use this module to accomplish almost anything a normal cell phone can; SMS text messages, Make or receive phone calls, connecting to internet through GPRS, TCP/IP, and more! To top it off, the module supports quad-band GSM/GPRS network, meaning it works pretty much anywhere in the world. Hardware Overview of SIM800L GSM/GPRS module At the heart of the module is a SIM800L GSM cellular chip from SimCom. The operating voltage of the chip is from  3.4V to 4.4V , which makes it an ideal candidate for direct LiPo battery supply. This makes it a good choice for embedding into projects without a lot of space. All the necessary

CONTROL AN LED'S USING NODEMCU AND THINGSPEAK. There are some steps to make this project: Make an account on https://thingspeak.com/ . create channel on thingspeak. Fullfill the code required credentials. upload the code to Nodemcu Esp8266 Development Board . Materials required for this project: Nodemcu Esp8266 Development Board . 5 mm LEDs (White, Green, Red, Yellow and Blue)  Any of these. Jumper Wires Male to Mal e. Bread Board . Laptop for uploading the code to  Nodemcu . Make an account on  https://thingspeak.com/ . Go to Google.com and Search for  https://thingspeak.com/ . Click on Get Started For Free.          Enter your Email ID. Enter your password. Create channel on thingspeak. Click on New Channel. Finally click on save Channel. Click on sharing option as shown in the image. To set the privecy. Fine you are all set to og for the coding part. Upload the code to  Nodemcu Esp8266 Development Board . //Welcome to Smarthub100---SUBSCRIBE Now #include "ThingSpeak.h"

Note: Use your Arduino Uno on the Arduino Web IDE. All Arduino boards, including this one, work out-of-the-box on the Arduino Web Editor,  no need to install anything . The Arduino Web Editor is hosted online, therefore it will always be up-to-date with the latest features and support for all boards. Follow this simple guide to start coding on the browser and upload your sketches onto your board. Use your Arduino Uno on the Arduino Desktop IDE: Amazon.in Widgets If you want to program your Arduino Uno while offline you need to install the Arduino Desktop IDE The Uno is programmed using the Arduino Software (IDE), our Integrated Development Environment common to all our boards. Before you can move on, you  must  have installed the Arduino Software (IDE) on your PC, as explained in the home page of our Getting Started. Connect your Uno board with an A B USB cable; sometimes this cable is called a  USB printer cable. USB connection with the PC is necessar