In response to the high interest shown by the readers on a spectrum analyzer posted here I decided to make a new design, that will be available in shop as a kit. The movie shows just a stage in the developing process, where the filters were being tuned. The final design will be powered by an atmega64 and will have 20 bands with 20 LED’s on each band.
I am now searching for a pcb manufacturer to get a good price on manufacturing the boards, then it will all be ready.. stay tuned.
As you can see from the picrures they are great, and the projects they’ll server are great also.
new pcb from bkrtech that is gonna be used for AVR DOPER programmer
new pcb from bkrtech that is gonna be used for AVR ATmega640 dev board
new pcb from bkrtech that is gonna be used for AVR ATmega64 dev board
Some of these projects will be submited here on Youritronics for more free PCB’s , i only hope more of you join the program because, there are more free pcb’s to be given.
This article was submited by morgoth and is part of the PCB giveaway program, so for submitting he’s work morgoth will receive a free PCB. Also in the future we’ll see more of he’s projects.
Of-course there are other projects based on this idea around the web, but what makes this one special, it’s he’s features. There are 3 stepper motors controlled by a single ATmega8 that runs at 8 MHz, and a motor driver for each motor. The motors and their drivers were recovered from an old printer.
Although the motors are controlled by the same microcontroller each one can move independent. The board can receive commands to drive the motors trough serial interface from a computer. There is also a PC software that enables you to send commands from a nice graphical interface.
As you can see this is a very practical application, for example it can be easily developed into a CNC machine. I personally like morgoth’s coding skils and i think he has some more great projects to show.
And in the ending here is a movie with the motors in action.
I think this is the easiest development board that one ca build, but it servers it’s purpose so there is no need to make it more complicated. I needed such a design to test some code that I’ll be using to create a small unit to fit in my car. A unit that will be able to show me the Clock, outside and inside temeprature, Fuel status, RPM’s , and also control some other functions like making an anoying beep when i leave my headlights on.
I made the board using my photo etching technique, and as you can see the results are great. The dev board has 17 I/O lines that are connected to a 17 pin header. On the board there is a 2 color LED tied to PortC pin 1 and 2. On PortC pin 0 there is a PNP transistor that controls the output for a buzzer. So i always use pin 0 to connect the buzzer.
There is also an ISP connector on the board to be used for ISP programming, and an extra VCC pin so you can get power from it. I power my board with 2 AA batteries which provide enough current for testing purposes, but to ensure you’ve got enough power you should probably power it from 3 x AA batteries to get 4,5 V.
Here are a couple of source codes that i developed on this board:
This one makes a beep for 5 seconds than stops.
And this one blinks the two color LED.
I’ll be integrating these codes in a larger project. All codes are written in C and the board was designed in Eagle, here are the download links:
The title is pretty straightforward, it’s time to give something back to my readers. Inspired by the Giveaway project from uChobby i created my own giveaway project the main difference is that instead of parts for projects i offer PCB’s for projects, professionally designed PCB’s. Our sponsor for this program is BKRtech, a professionally board manufacturer.
I hope you’ll find this interesting and participate. The program page is here.
