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=Welcome to the Dilshan R Jayakody's Project Repository=

In this wiki I publish all electronic, computer and mechanical projects which I described in [|Dilshan R Jayakody’s Web Log]. Please select the project(s) from the following list to get more details.

Unless otherwise noted, all projects in this wiki are design and tested by myself. Also all electronic designs and documentation in this wiki are covered under the terms of Creative Commons Attribution-ShareAlike 3.0 license and it allows remix, transform, and build those projects for any purpose, even commercially.

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 * Notes:**
 * Due to license restrictions I decided to switch my schematic capturing / PCB designing from EAGLE to KiCAD. KiCAD is free and open source software suite for electronic design automation. Please note that all the projects published in this site from 2018 are based on KiCAD software system.


 * I got lot of e-mail about archive files in this repository, the main question is its naming format. All archive files in the wiki (which are mainly //zip// or //7z// files) are named in format like this: //**N**xxxx**D**ddmmyyyy//. Where //xxxx// is my project reference number, which is increased by "one" for each project. Then publish date in //ddmmyyyy// format. For example: //N0075D18122015// means: it is my 75 th project and published on 18 th December 2015.

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 * The second question which I got frequently is about downloading archive files; When you click download link in article, you are first going to a page where it show all the details about that file, which include //file name//, //size//, //type//, etc. On that page button is available to download the actual archive file.

3.3V - 1.5A Compact Power Supply Unit 1.5A - 3V to 27V adjustable power supply using LM723 433MHz RF remote control system for RC Cars 9 Pin dot matrix printer using PIC16F84A AT89S52 base RPM counter Automated Telephone Remote Control Compact logic probe with digital pulser Home produced USB Sound Card Low Cost and High Quality Stereo FM Radio Receiver PS2 Keyboard driven Morse code Generator Simple ATMEL AVR - Programmer User Programmable Automatic Night Light Low Dropout Single Rail Adjustable Power Supply Unit 20W Hi-Fi Audio Power Amplifier Automated Home Security System 12V DC to 230V AC Inverter Homemade ADSL Splitter 4 Channel Remote Control Video Switch Ultra Simple Stereo Computer Speaker Driver 8 pin 2 digit seven segment display driver Virtual MCU Base Programmable Timer Electronic Number Panel 8 Channel USB Logic Analyzer 2 Channel Electronic Motor Speed Controller Low Voltage Simple Motor Speed Controller Programmable Home Security Alarm System 32W Hi-Fi Audio Power Amplifier using TDA2050 Electric Fence with Automated Monitoring System Mini Servo Controller PIC16F877A/PIC16F887 Microcontroller Development Board XBMC USB Controller Ultra Simple Microchip PIC Development Board Microprocessor controlled CW Beacon Extend PIC Microcontroller‘s RAM by without using EMI 5V 5A Bench Power Supply Offline High Voltage AC Power Supply LASER Based Gate Keeper LEDShoot - Electronic LED Shooting Game Simple ATmega325 Development Board Replacement Code Lock for LS7220 base Systems DIY Liquid Level Monitor and Automatic Control System USB Custom Hardware Interface for Unity3D Microprocessor Controlled 16 Line Connectivity Tester USB Random Number Generator LMD18245 Microstep Stepper Motor Driver Centralize power switch for PC arrays with power failure monitor 3.3V Power Supply Unit Oscillator Controller for 8bit PIC Microcontrollers 8bit ALU Simulation using ATmega169 300V AC\DC Variable Power Supply Hi-Fi Audio Power Amplifier for experiments and general use Digital audio amplifier with PLL synthesized FM radio Digitally controlled 2.1 channel analog audio power amplifier Optically controlled servo motor Simple CMOS FSK modem Simple Automatic Car Battery Charger VHF Aircraft radio communications receiver Homebrew Audio Signal Generator Low power FM stereo transmitter Digital data capture unit with EMF reader SL414 Vintage power amplifier IC Simple Telephone Locator Light Two transistor superheterodyne shortwave receiver BFO for SSB Reception 4 way Stereo Unbalanced Distribution Amplifier Low cost DC millivolt source 3A Power supply for USB devices CD2003 - yet another simple FM radio receiver UC3844 base motor speed controller Contactless DTMF switch Soldering station to drive HAKKO 907 handles USB to 3.3V-5V serial TTL adapter Low cost TEA5767 based FM stereo radio receiver 48V Phantom power supply Dynamic microphone preamplifier Replacement LED driver for AN6877 74181 ALU design on Altera MAX II CPLD Light operated voice messenger Musical Trees Simple door bell for access control systems Artificial star unit Low voltage power supply unit Simple crystal tester Modified Heathkit HD-1410 electronic keyer μPC1237 based 2 channel speaker protector Adjustable constant current source Yet another CXA1191 FM radio receiver Network cable tester Automatic fan controller for server racks

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