Category Archives: News

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DIY RGB LED SPECTRUM ANALYSER using STM32

After two weeks, our music spectrum has been finished. This is how it looks, the major portion is a large RGB LED panel. Now let us share the whole working process of the music spectrum and also provide the complete circuit and PCB for the DIY LED Music Spectrum. Typical materials: Flexible 16×16 RGB LED Matrix(WS2812B). https://www.adafruit.com/products/2547 Core Board, DIY by EasyEDA. Switching power supply, 5V 40A. Audio Line*1, 1 min 2 audio interface*1, Speakers*1. How to make a LED Music Spectrum Step 1) LED Connection       Connect two 16*16 matrix to form a 16*32 LED matrix. How to connect: Connect the DOU interface of the first LED matrix into the DIN interface of the second one Step 2) Power Connection The operating voltage of my LED is 5 V, so I would like to connect two LED power interfaces into an outlet of a 5V control power.  Please take a note that the each LED panel require 18A current, so it is recommended to use an over 40 A control power and choose a thick enough wire to connect it. (As the illustration above shown,  the LED power interface is connected to a control power. Actually, the wire used is very thick) Step 3) Making control panel A control panel is to receive audio signals which are processed by […]

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EasyEDA vs Eagle – Comparing PCB Layout Editors

In the last part of this article series we discussed schematic capture. After schematic design is completed comes the time for board design. This can be done by selecting menu convert project to PCB in EasyEDA and File>Switch to Board command in Eagle. These will open up the second part of the software that deals with PCB design. Here we can define the physical shape and size of the board, place components on this board at their actual physical positions and draw (route) trace between the pins. When the board layout is opened first time in EasyEDA from a schematic. The software automatically creates a small board outline for you according to the number of components present in your schematic. This board’s size is just enough to fit all the components. You are free to change the shape and size of this default board outline. The free version of Eagle limits the size of the board, so you cannot create a very big PCB. Thanks to EasyEDA you can use it to create complex and big boards absolutely free of cost! PCBs software uses layer system to make things easy to wok with, logically different part of the PCB artworks are assigned different layers. For complete beginners in PCB designing I would not confuse them with description of too many […]

Designing Schematic in EasyEDA and Eagle

In this part we will compare the schematic design process in EasyEDA and Eagle. EasyEDA is free web based solution for schematic design, PCB design and simulation which is launched recently compared to Eagle. On the other hand Eagle has been popular with hobbyist and makers for a long time. The first thing that comes to mind of a fresh new user who is just starting to learn schematic design is :- "Hmmm, so this a schematic design software! Looks nice! I can see the sheet where my drawing will be made (this is the biggest visible area in any EDA software so not so hard to guess!) but where are the components? from where can I bring that transistor that I wanna put on this sheet " Well, if you are using EasyEDA it would not take more than a minute to find the left side bar. This is where you will find all basic electronic symbols! You would probably click on any component and then click on the sheet area to place it! Bingo! you just took the first step without reading any manual or tutorial! And remember the first step is the hardest but you just did it so easily you might guess how easy is EasyEDA after all! Now let us compare the same process done […]

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Token Number Display Project

This article on Digital Wizard describes how to make a token number display system using AVR ATmega8 microcontroller. The article has everything including detailed schematics, program, and Proteus simulation files. This makes it very easy to fabricate even by a new user. Read more

How Vikas Srivastava of Roboshere cheated us!

We trusted this guy (Vikas Srivastava) and sent ordered products on post paid basis, it was agreed that payment would be done by net banking transfer the same day the delivery is made. We shipped the products through Blue dart express. The tracking number is 14909741700. The snapshot of tracking is given below. It was delivered on 22 Aug 2016 which was Monday. We asked this guy for payment, but he delayed by saying to wait till Thursday. We waited till Thursday. But they did not made the payment. It was a very simple development board for AVR ATmega8 whose function is to provide 5v regulated supply to the ATmega8 from a power adapter. This functioning can be easily tested in 2 minutes. Now they were trying to make a line follower robot out of it and it they were NOT able to do so! So is this a reason to delay payment? Is it like that you take the product for free and your experiment takes 6 months to complete you will not clear the payment of supplier? We even said if you are not satisfied by the product or think it has some fault please return it. But they also did not returned the products. SO WE REQUEST ALL OTHER ONLINE SELLERS TO BE BEWARE OF THIS PERSON […]

EasyEDA Releases Free Online Gerber Viewer for Beginners and Experts

EasyEDA Releases Free Online Gerber Viewer for beginners and experts EasyEDA is a free, cloud-based EDA application for drawing circuits, running SPICE simulations, designing PCBs, and even placing orders for fabricating PCBs. All this can be done at one place with EasyEDA online tool. We have already covered EasyEDA in detail in this article, with an example, created a LED Strip Multi Effect Controller with Arduino Nano and EasyEDA here. Now they have released an Online Gerber Viewer to visualize the Gerber files generated by a PCB CAD tool. The tool supports the Gerber RS-274X format, which is an industry-standard image description format for PCBs. The tool receives the Gerber files in a compressed zipped folder and performs a 2-D rendering to generate high-quality images of top and bottom sides of the PCB. The Gerber viewer also runs a simple design check in the background and displays some useful information about your PCB design, such as its dimensions, minimum clearance, copper trace and silkscreen width, etc. At the same time, EasyEDA runs a simple Design For Manufacture (DFM) check, from which you can see the board size, hole and track sizes and clearances of the various PCB objects such as tracks and pads. EasyEDA Gerber Viewer could be used to detect your Gerber, actual size, while you place order. It […]

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LED Strip Multi Effect Controller with Arduino Nano and EasyEDA

  Today I will show you how to make a LED Scroll Bar as shown in the image above. It will flash ten LED strips in different effects by using a control board.  Required Components LED strip, Arduino Nano, Dupont line and a control board. So, how to make a LED Scroll Bar? Step 1) Preparation Cut the LED strip into 10 pieces and each piece may have arbitrary number of LEDs. Then, weld the traverse at an interface of the LED strip. Here I prefer to use Dupont line to connect.                   Step 2) Design Make a control board. Using the control board to control the flash pattern of LED strips. Aided by Arduino Nano and equipped with a keypad, we can make the LED strip flash in different patterns. Step 2.1) Start with Designing Schematic To design my circuit, I chose a free online EDA tool called EasyEDA which is a one stop design shop for your electronics projects, it offers schematic capture, spice simulation, PCB design for free and also offers high quality but low price Customized PCB service. There are a large number of component libraries in its editor, so you can easily and quickly find your desired parts. You can access the following schematic diagram through this link Notes: The voltage of the LED strip is 12 […]

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Making a LED Message Display using ATmega8 and P10

This LED moving message display is four feet in length and six inches in length. Horizontally their are 128 leds and vertically 16. It can show message in English language scrolling from right to left. The system is made using four P10 led display modules and ATmega8 as microcontroller. It has PS/2 keyboard interface that is used to enter message to the board. To enter text, keyboard is connected and Esc key is pressed, this brings the device into text entry mode. After this the whole message is typed using keyboard, at the end of message Enter key is pressed, this saves the message in internal EEPROM of the ATmega8. Now the keyboard can be removed. Read more …

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Interfacing DHT11 Humidity Sensor with PIC MCU

This article on DigitalWizard describes how you can easily interface DHT11 humidity sensor module to a PIC microcontroller. A working C program is developed to command the sensor to start measurement and then send the data to microcontroller. The data sent from the sensor is in form of a special serial format that is decoded by the MCU to get the humidity and temperature information which is finally shown in LCD. Please click here to read more.