Vinod.S @ blog.vinu.co.in writes:
This is my first AVR based hobby project and the most successful one compared to my all previous stuff. I am 100% satisfied with this work.. Few months ago, I tried to make a wav player using a PIC16F877A. It worked anyway, but the audio quality was not so good for higher sampling rate because that chip doens’t have enough ram and thus I couldn’t implement a good data buffer. But when I bought an atmega32 microcontroller, the first thing came to my mind is to make a good wav player…Now, I have completed my work and the audio quality is really amazing…
NOW I can say that, my wav player IS ABLE TO PLAY 8 BIT MONO/STEREO with maximum bitrate of 1300kbps for mono and 1600kbps for stereo … ie it can play an 8 bit mono wav of sampling frequency upto 160KHz and stereo upto 96KHz without any noise or trouble!!!!! (at OSC 16.450MHz).
Stereo MMC WAV player using ATMEGA32 - [Link]
Charalampos Andrianakis writes:
Autonomous live tracking weather station. It takes (analog/digital) measurements and sends them to a web server over GPRS. Adding a battery and a solar station you can make it fully autonomous. It supports up to 3 Analog or Digital inputs. The main brain is the PIC 16F877A which also drives the SIM900/300 GSM module which is placed in the back of the PCB.
The main purpose of this project is to take wind flow measurements of different locations and store them in a database remotely. By this you know if the locations are appropriate for future installation of wind generators.
The data send from GSM to Web server with GET requests which isn’t the safest and best way but its an easy way to make it work. The example code you can find at the github is a very simple example and has no security responsibility.
GSM/GPRS Autonomous Weather Station (Tracking System) - [Link]
Pinguino is an Arduino-like board based on a PIC Microcontroller. The goal of this project is to build an integrated IDE easy to use on LINUX, WINDOWS and MAC OS X. This is a simple 40 pin PIC development board as described in RadCom for November 2009. It is designed for a PIC18F4550, but it will work with other 40 pin PICs like the PIC16F877A. It has no bells & whistles attached. No buttons, LED, LCD ICSP etc. All of the PIC pins are easily accessible so that you can add any features you need. This board has been tested with the Vasco PUF and the Pinguino USB bootloaders.
PIC18F4550 Pinguino Development Board – [Link]
In this project we design low cost high performance programmable home security system using few LDR’s as an input sensors. When above sensor(s) get triggered system may dial the user specified phone number (using build-in DTMF generator) and activate the high power audio alarm and lights. All the parameters of DTMF generator, audio alarm and light interface are programmed through the RS232 serial interface.
Current firmware of this system presents interactive control system through the RS232 interface. This control system consist with the menu driven configuration options, self tests, system report generators, etc.
This system also contain 5W (with 4Ω speaker) audio alarm with three selectable tone configurations, which include Police siren, Fire engine siren and Ambulance siren.
This system uses a Microchip’s PIC16F877A as a main controller, LM339 as sensor interface, UM3561 as a tone generator and μPC2002 as a speaker driver (audio amplifier). LM7805, LM7812 and LM317 voltage regulators are used to obtain +5V, +12V and +3V respectively.
All the project source codes, schematic diagrams and PCB patterns are available in “http://elect.wikispaces.com/Programmable+Home+Security+Alarm+System” with terms and conditions of GNU GPL and Creative Commons – Attribution-ShareAlike 3.0 Unported license
Programmable Home Security Alarm System – [Link]
What do you do if you have a spare LCD module with backlight, a weird 16 button keyboard, and a PIC16F877A microcontroller gathering dust? A monster Martian Clock immediately springs to mind.
You are probably thinking “There are hundreds of PIC clocks on the Net – do we need yet another one?
This clock is quite different than all other PIC clocks I’ve seen in this that it has multiple timers that can work with different speeds (for example, you can have one showing your local time, another working on Mars day time, another showing the moon phase, etc.)
Mars Clock – PIC-microcontroller-based clock - [Link]
LCD SWR Meter presented here meet many simple task using a PIC16F877A micro controller. The very basic purpose to make this project is to encourage radio amateurs to build their own SWR Meter at very low price instead of buying ready made at high prices. [via]
HF 100W LCD PIC16F877A SWR Meter - [Link]
A guy from Abe Howell’s Robot writes:In this tutorial I explain the basics of adding a SonMicro RFID development board to a NewCDbot that is controlled by an OOPic-I, OOPic-II or OOPic-II+. In this tutorial I explain the basics of adding a SonMicro RFID development board to a NewCDbot controlled by a CCS PIC16F877A Development board. Programming tutorials for both will be coming soon.Also,in this page you will see a list of ideas and projects that they hope will help you in your robotics journey. [via]
Adding RFID to Your New CDbot Robot - [Link]