EMBEDDED TWEAKS

Embedded Electronics Tutorials, Coding and lot more

Category: Projects (page 1 of 2)

Android based LED matrix display via Bluetooth

This one is interesting just like displaying a custom message on LED matrix banner. Just from an Android phone on our finger tips. Change at anytime anyhow, at just one touch.

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Beaglebone USB Webcam MJPG streamer installation tutorial

You might be thinking to stream video from your robot to your phone or laptop, or design a surveillance system like CCTV via beagle bone. So this post is for you. Here we will see how to install MJPG streamer on your Beagle bone and see its output on your WiFi enabled phone or other devices.

webcam

I am using Beaglebone Black Rev.C and Logitech C170 usb webcam. You can see a huge list of Raspberry Pi compatible peripherals list here. They are also compatible with BeagleBone. http://elinux.org/RPi_VerifiedPeripherals

Especially for webcams , http://elinux.org/RPi_USB_Webcams Continue reading

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Motion controlled Android robot

This is the latest motion controlled robot made by me. Operating right from your android phones, tablets. Just a single movement of your hand is enough to move the robot. Also has a temperature sensor in it, which transmits temperature data to Android device via bluetooth.

An object sensor is also added for safety. So that even if the user gives false input, but the robot stops itself to collide with wall or any objects.

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HC-05 Bluetooth interfacing with your microcontrollers

Bluetooth:

Bluetooth® wireless technology is becoming a popular standard in the communication. it is one of the fastest growing fields in the wireless technologies. It is  convenient, easy to use and has the bandwidth to meet most of today’s demands for mobile and personal communications. Bluetooth technology handles the wireless part of the communication channel; it transmits and receives data wirelessly between these devices. It delivers the received data and receives the data to be transmitted to and from a host system through a host controller interface (HCI). The most popular host controller interface today is either a UART or a USB .Here, I will only focus on the UART interface, it can be easily show how a Bluetooth module can be integrated on to a host system through a  UART connection and provide the designer an optimal solution for Bluetooth enabled systems.

bluetooth interfacing microcontroller

The bluetooth module I will use today is HC-05 which is so familiar and cheap. It is easily available in local indian markets. You can go either offline or online. You may find in about ~600 ₹. May be if you search better, you can get as low as 450 ₹. Continue reading

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Controlling your Electrical appliances via PC/Laptop (8051 Microcontroller)

The whole simulation video is available at youtube link below:

 You can download hex file and proteus simulation at end of the post.

This device can be used to control your home’s all 230V appliances directly from your PC. We can do it via the serial port of our PC. We have used the 8051 microcontroller here.  We are communicating via the RS-232 port.

The circuit is designed in the proteus ISIS software. I have first simulated the circuit in the proteus so that all correction and debugging process is done in the PC itself. So we don’t need Continue reading

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Control your home over WiFi

Ever thought to control your home over WiFi? Here’s a tutorial through which you can control across many devices like Laptops, Smartphones, tablets anything.Here i am presenting a tutorial to do this with simple steps. Screenshot from 2014-10-31 09:35:20 I am using a BeagleBone Black as my main board for controlling. I have Linux installed it. The version is Debian. To know about beaglebone black click here. BeagleBone Black is a low-cost, open source, community-supported development platform for ARM® Cortex™-A8 processor developers and hobbyists.  It is powered Continue reading

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Controlling electrical Appliances via SMS

This device can enable you to control your home appliances by just an SMS message. You can also monitor some data like temperature, gas leakage, door status etc.  I am using a PIC microcontroller PIC16f887 for this purpose. I written the code in Mplab X IDE and XC8 compiler. Here for demo I have attached a gas, light, door, temperature sensor, Rain sensor. LM35 is used as temperature sensor.

App

SIM900 GSM modem:

 I am decoding the incoming SMS from SIM900 GSM modem. GSM/GPRS Modem-RS232 is built with Dual Band GSM/GPRS engine- SIM900A, works on frequencies 900/ 1800 MHz. The Modem is coming with RS232 interface, which Continue reading

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Accessing PC serial port in Visual Basic

All of the electronics engineering students mostly want to create something which has a nice GUI control for their device. But they see softwares like VB6, VB.NET as pure software language. On the other side, Computer engineering students see also these software as pure GUI. Electronics geeks know the hardware and computer geeks know software. But Actually these languages such as VB6, VB.NET, Java can provide us very useful features to control our hardware connected to PCs. Here i am presenting a very basic tutorial to access serial port of PC in the VB6 software.

We will create the GUI (Graphical User Interface) which contains some buttons. Pressing them we can send some data to our PC’s serial port. Though it is a very basic tutorial but this is a must learn step. Further you can receive, send, monitor data, take some Continue reading

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TV remote decoder (NEC protocol decoder)

Today there are many remotes available in the market. They are different as per their target applications. Even though they are from different manufacturers, but they follow some standard protocols such as RC5, RC6 or NEC protocol. Here i am showing how to decode NEC protocol remote. I am using a PIC16F micrcontroller. NEC is the toughest protocol to decode, hence secure also. You can see full video demo here.

remote

NEC protocol:

  • 8 bit address and 8 bit command length
  • Address and command are transmitted twice for reliability
  • Pulse distance modulation
  • Carrier frequency of 38kHz
  • Bit time of 1.125ms or 2.25ms

Continue reading

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PC based home security system

This system can provide all data like temperature, gas , door status of your home on PC screen. All data of parameters like temperature etc are stored in database and can generate Excel file so that you can view data of any day in history you want. This system is very useful in modern houses. Here for demo i am taking 2 sensors: Gas Sensor and a Temperature sensor LM35.  The heart of the system is PIC16F887 microcontroller. It monitors both our digital Continue reading

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