Sunday, April 12, 2015

Circuit Schematic and List Programming of GSM based SMS Alert Fire Alarm System using Arduino

Robometricschool. - Do you want to build your own GSM based SMS Alert Fire Alarm System using Arduino? Maybe you you can use this article to give you reference one of the circuit schematic and listing program based on Arduino for GSM based SMS Alert Fire Alarm System using Arduino.

GSM based Fire Alarm Project
Figure 1. GSM based SMS Alert Fire Alarm System using Arduino / Circuitstoday

Recently we have learned how to interface GSM Module with Arduino and send/receive SMS using GSM module. Interfacing any device with a micro controller is the first step to building a useful system or project with that particular device. In this tutorial, we are going to build a very interesting project – a Fire Alarm System which will send SMS to a set of Mobile Numbers when fire occurs in a particular location. We have seen many typical Fire Alarm projects which will alert with a siren or an automatic shutdown mechanism. This fire alarm project make use of modern communication technologies to deal with emergencies.

GSM based SMS Alert Fire Alarm System using Arduino : [Link]

Circuit Schematic 40KHZ LED TEST SIGNAL GENERATOR using 7404 IC

Robometricschool. - Here is Circuit Schematic 40KHZ LED TEST SIGNAL GENERATOR using 7404 IC. The main component in this circuit schematic is 7404 IC as the digital or TTL IC that must be powered with 5 Volt DC and also passive component x-tal that will produce or generate signal.

Circuit Schematic


Circuit schematic like in figure 1 above is Circuit Schematic 40KHZ LED TEST SIGNAL GENERATOR using 7404 IC. This 40KHz crystal controlled oscillator circuit drives an infrared LED with powerful 40ma pulses.  The circuit can be used to test optical communications circuits, designed to receive 40KHz modulated light signals.

Link Source:


Wednesday, April 8, 2015

Realize your Dreams in Internet of Things Era

Robometricschool. - Can you realize your imagine toys when you still in children in this time? We thing it is to be realize when you follow the developing of Internet of Thing in this era. It is because that in Internet of Things era will open new opportunity for your creativity. Not only for young people, children with good creativity can realize their desire.

Image : DetikInet

With using like Intel Galileo and Intel Edison technology, people can realize their desire with not just drawing robots, spaceships, or futuristic fashion design, they even really can make it by following the tips and free software available on the Internet.

According DetikInet, 2/11/2015 that the equipment used by the creators of the famous product is now increasingly available, both for school children, hobbyists, and for those who have an idea and a desire to tamper with the electronics.

Access to this technology can be traced to the presence of the rapid increase in the so-called open design movement, which is defined as the development of physical products, machines and systems through the use of public information shared design.

In the past, what might be too complex or expensive for most people, it is now easier to use and affordable for anyone interested in making a device that is connected to the internet and can be controlled from a personal computer, tablet or smartphone.

Like Jamel Tayeb, who works for Intel Software and Services Group, has just created a balloon space, using Intel Galileo, low-power and the size of a smartphone.

The balloon was able to fly as high as 97,000 feet before returning to earth, not far from where it was launched and can take amazing photos.

Although Tayeb familiar with electronics for appropriate work, but this is the first space balloon he had ever made. Tayeb using a material that anyone can buy it online, or can be purchased at almost all major electronics stores.

As open source software, which usually develops in collaborative community and even for free. Likewise, the open source hardware, which allows anyone to reconfigure or program the computing components using a variety of software, both free, open source and paid software.

The term Internet of Things be a keyword used by technology companies lately. But Edward Ross says what is in reality little more driven by the movement of the open design.

Various microcontroller available today, but Intel is making a new type that gives makers a great performance computing and software that makes it easy to connect to the Internet creations, using cloud services to analyze and store data and even connect to another wireless device.

Dream to create the future of gadgets in the era of the Internet of Things could also be realized by seeking funding through Kickstarter commonly relied upon by the tech startup.

What is the Internet of Things?

The Internet of Things (IoT) is the network of physical objects or "things" embedded with electronics, software, sensors and connectivity to enable it to achieve greater value and service by exchanging data with the manufacturer, operator and/or other connected devices. Each thing is uniquely identifiable through its embedded computing system but is able to interoperate within the existing Internet infrastructure. (Wikipedia)

Sunday, April 5, 2015

3 Unknown Reasons You Should Buy a New Samsung Smartphone Galaxy S6 or Galaxy Edge

Robometricschool. - There are few differences of a new Samsung smartphones Galaxy S6 and Galaxy Edge. It is make people difficult to choose one others to buy Galaxy S6 or Galaxy Edge. People should have good reasons when want to choose two kinds of this smartphones. 

Samsung S6 / wonderfulengineering
We will show you 3 reasons you should know to buy Samsung Galaxy S6 or Galaxy Edge. So after read this reasons you will choose them.

A. Everything Same 

All of the specification and features between Galaxy S6 and Galaxy S6 Edge is same. There is little difference of these smartphone minority hardware differences, like the G6 Edge's battery that's not to larger than between 2,600mAh versus 2,550mAh.

You can remember again with the same main specification of these kinds Galaxy S6 and Galaxy S6 Edge as follow:
  • Available in 32GB, 64GB and 128GB capacities
  • Octa-core processor
  • Glass and metal build
  • 5.1-inch ultra-high definition screen 
  • 16-megapixel camera
  • Wireless charging
  • Fingerprint reader
  • Quick charging 

B. 2 Major Differences 

The main two difference physically is edge shape in Samsung S6 Edge. The design comes across as both sharper and more petite, with an air of fragility that will likely make most S6 Edge owners dash to buy a case. Then there's the Edge software, which includes ways to quickly reach and respond to the five most important people in your life, among other tidbits, like a night mode that dimly displays the date and time after lights-out. These are nice extras, but hardly catapult you to the next level of smartphone existence.

C. How Many Price Difference 

One again the main difference between Samsung S6 and Samsung S6 Edge is the Price. Carriers and retailers will set their own prices in your country and currency. For the sake of comparison, though, the 32GB S6 Edge costs between 14 percent and 19 percent more than the 32GB S6. In dollars, that's between $100 and $130 more for the same capacity.

Thursday, April 2, 2015

Circuit Schematic Two Way Intercom using LM386 IC

Robometricschool. - Here is simple circuit schematic two way intercom using LM386 IC like in figure 1 below. LM386 is a very popular and widely use 8 pin audio amplifier used to amplify sound signals. The circuit describe below can also be used to amplify the sound signals from mobile output, CD player or it can be used in cars to amplify sound signal.

Circuit Schematic
Figure 1. Circuit Schematic Two Way Intercom using LM386 IC(Source: engineersgarage)


Circuit schematic like in figure 1 above is Circuit Schematic Two Way Intercom using LM386 IC. Working of this intercom circuit is very simple first we have to adjust its gain factor through pin 1 and 8 if it is left open the gain will be 20 as it is internally set in IC but it can be vary by adding a resistor and a capacitor up to 200. Now feed the required signals to pin 2 or 3. A resistor is connected to pin 3 to adjust the sensitivity of input signal and we will get output on pin 5.

C4 is used as current bank for output means when demand for current become low it supplies electrons or when sudden surges of current occur. C5 act as a coupling capacitor remove DC signals and passes only AC signals through it. And we will get the amplified signals through speaker.

The speaker volume can be adjusted with the help of variable resistor VR1.For the circuit to operate as two way intercom make two identical circuits as shown in circuit diagram.  Now connect output of one unit to speaker of other unit and vice versa and use independent power supply for two units and connect them with 3 core wire, two wire for outputs and one wire for common ground is required for intercom connection. You can see from the below circuit how to connect the two units simultaneously. Read more this description using link source below.

Source Link :


Saturday, March 28, 2015

Circuit Schematic Project Tiny DDS - Open Source DDS Generator

Robometricschool. - Here is Circuit Schematic Tiny DDS - Open Source DDS Generator like in figure 1 below. This project is an open source (hardware & software) DDS generator, based on: smart TFT module, AD9834, LM7171 fast amplifier.

Circuit Schematic

Figure 1. Circuit Schematic Project Tiny DDS - Open Source DDS Generator


The homemade function generator is a quite common project on the internet. We can find different ways to do it:

  1. The quick & dirty way based on a DDS module bought on eBay
  2. The analog version based on a MAX038 / XR2206
  3. The “clean” way based on a FPGA and a fast DAC (e.g.
  4. The software way (e.g. Arduino + R/2R DAC)

From my side, I wanted a small one which could fits my needs without being too expensive. According to me, such generator should at least:

  1. Be easy to use
  2. Output a signal from 1Vpp to 10Vpp (+/-5V), from 0 to 1MHz
  3. Have a low profile
  4. Without electric hazard (shall work on a 12V DC)

Friday, March 27, 2015

Free Download Smarter Battery Version 4.0 for Windows

Robometricschool. - Here is software Smarter Battery. Smarter Battery 4.0 analyzes and displays your battery's wear level, discharge cycle, and other important parameters, constantly updating its predictions of how much charge remains and sounding alarms at critical points. Its attractive interface includes a Calibration feature for new batteries, as well as Fast Discharge and Green modes. Smarter Battery 4.0 supports up to four batteries and is free to try with a 10-use, 15-minute limit.

Figure 1. Screenshot
(Source: CNET)


From Microsys:
A battery monitoring utility for portable computers, intended to provide you with all the battery data, to help prolong its life and save its energy. It shows you the evolution of the battery's capacity during the charge / discharge cycles and computes a few important battery parameters, such as the Wear level and Discharge Cycles count. It features a new battery Calibration, Fast Discharge and Green mode functions. This program continuously reads the battery data, making a prediction for the time remaining. Two alarms, for low / critical battery capacity, can be triggered by either values of time remaining or capacity percentage you set. The battery capacity evolution can be graphically displayed for up to 16 hours period of time, so a complete charge or discharge cycle can easily be visualized and analyzed. Both calibration and fast discharge procedures were updated to perform better on Windows 8 laptops or tablets. A battery gadget, with many format options, is displayed by this utility and offers you a fast, clear view to the current battery state. The Power Plan selection is included in its menu, along with Shut down, Standby, Restart, Hibernate commands. A must have, inexpensive, easy to use utility that allows to maximize your battery life and performance.

What's new in this version:

Up to four batteries can be registered at a time


Please download free Smarter Battery Version 4.0 for Windows using link below from external server.