Electronic Projects
 | Simplest and Cheapest Foot-Controlled Telepromter Ever
I designed the simplest remote-controlled telepromter system possible with materials that i unburied from my old-and-busted bin, my old P4 laptop, a totally broken USB keyboard, a piece of plexiglass... A foot-switch controls the scrolling of the text in the teleprompter screen.
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 | SMD Reflow Hot Air Gun NC Automatic Machine
The soldering reflow process is usually the only way to go if QFN packages are used. To properly reflow a QFN one has to follow a reflow chart provided by the manufacturer. The process takes some 6 to 7 minutes to fulfill, which is a lot for doing it by hand. Plus it is not easy for one to follow the temperature chart precisely. Therefore, i built this NC machine to do the reflow job automatically...
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 | My first project ever -Remake- Simple Needle Detector
This is a remake of my very first electronic project. I made it when i was 7 with the help of my grandfather, the mop of my grandmother, the flash from the camera of my father. This was the kickstart for me in the world of electronics. Since the original pin detector is lost, i thought that i should make a remake for the history...
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 | GSM Caller Alarm
A very simple GSM CALLER ALARM.Combining a pic microcontroller with a quad cmos bilateral switch makes it a perfect solution for our circuit...
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 | DIY Small Size Air Compressor on the Cheap
I want to make a pneumatic solder paste dispense, so i need the solder paste, the dispenser, and the pneumatics ;) For the pneumatics, i also need an air compressor. My funds are too short to buy one, so i decided to make one low-capacity air compressor suitable for my needs.
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 | Keyboard-Mouse Smartcard USB Lock with PIC
I began a new project for my PC: I'm making a USB ON/OFF switch controlled by a PIC smartcard reader. The purpose is to enable or disable the keyboard and mouse interface by inserting a phonecard into a smartcard reader slot.
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 | How to make a professional-like panel label
A walk through on making a professional-like panel label for your project.Equipment required are an inkjet printer, a laminator, laminating pouches, scissors, hole punches, adhesive.
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 | PIC ICSP Instant SMD Connector with Pogo Pins
Some time ago i began replacing my chips and other electronic parts with SMDs, including the PIC microcontrollers. To program the microcontroller i had to add a through-hole or SMD connector with 5 pins, but this actually had much larger footprint than the PIC itself. So i decided to design a pogo-pin ICSP connector and an SMD Eagle library to print the ICSP pads on the PCB directly!
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 | Hack a Hg Lamp to a Powerful UV Light Source
I got some UV curable paint for my homemade PCBs. This paint needs UV radiation to be cured. I thought that my UV artwork transfer box would work, only to discover that this paint needs much more radiation. So, i hacked a mercury vapor gas discharge lamp that i had and turned it into a high power UV lamp.
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 | Triple PID Temperature Controller
A customer asked me to design a PID system that will control 3 different heating resistors and it will get temperature feedback from 3 J-type thermocouples. This industrial application will be used for an IMA edge-banding glue pot maintenance base.
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 | Tiny LED Debugging Board for Breadboard Prototyping
I made a very simple tiny breadboard PCB with 4 LEDs and 4 resistors pre-wired, mainly for debugging purposes during prototyping. The boards are very small, two boards can be placed side by side and still will occupy 8 breadboard columns - each board occupies 4 columns, one for each LED.
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 | K-Type Thermocouple PID Controller
I plan to make a pre-heater for my SMD works, and i will need a controller for the air heater. After learning how the PID controllers work, i will make my own PID controller. The controller will read the temperature from a K-type thermocouple pair. 3 7-segments will be used to display the current temperature and 3 more for displaying the set-temperature. A PWM output will be used to control the fan speed for the hot-air, and an optocoupler-TRIAC pair will be used to control the power of the heater.
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 | Servo-Actuated Door Keylock Hack with capacitance touch-pad
Opening the apartment's door by entering a security code is super cool and usually prepares those who enter of what they are about to see inside, in my case they face my techlab. In this hack, i will show you basically 2 things: First, how you can hack and mod the simple classic keylock mechanism to make it servo-actuated for less than $5, and second how you can make a very cool capacitance touch-pad to enter the security code, with extremely low power quiescence consumption to be long-term battery operated.
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 | A Portable LED Head Lamp
During some experiments with LEDs and acrylic glasses, i came up with this idea of an LED head lamp. The construction and the electronic staff are so simple, that even a kid can make them. This project is addressed not to those who want to have a cheap head lamp, but to those who want to get some more ideas for LEDs and acrylic glass constructions.
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 | A Camping LED Lamp
I chopped a very old electric lamp that i had and converted it into a sophisticated LED light lamp. The interesting part of this project is the way that the LEDs light. There are 4 scales, which not only control the brightness of the lamp, but also control the direction of the light.
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 | An LED Pushbutton
With materials ripped off from old appliances and junk-PCBs, i made a fancy LED pushbutton. The LED is fully functional and can turn on and off independently, while if you press it, it makes contact at a NO micro-pushbutton.
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 | Men Of War Game Console
Men Of War is my favorite game so far! I made a Game Console for this game, so that i can take advantage of game shortcuts. But more important is the joystick that this console will have. This joystick simulates the keyboard arrow keys along with the control key. In other words, this keyboard will engage and disengage Direct Control automatically upon move! This is the best feature that all Men Of War gamers would like to have, especially when playing this boring "Only Tanks"....
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 | Instant Cold Coffee Machine
The Greek style instant cold coffee is an excellent coffee for the warm days. Yet, there is no machine built for this, as it would only sell in Greece. So, i have to make my own machine...
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 | Homemade Soldering Station
For under $40, i made a professional-like sodlering station. This controller will read the temperature from the soldering tip, and will turn on or off the heater accordingly. This is a characteristic only for very expensive soldering stations. Cheaper sodlering stations have only (unlike my controller) a PWM or a similar power controller, that only sets the power delivered to the heater, WITHOUT TEMPERATURE FEEDBACK.
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 | A 7-seg pre-wired Breadboard Module
Another project for my lab. I made a 5 digits 7-segment module for my breadboard circuits. It will save me a lot of time, as all digits are pre-wired for multiplexing. Also, the 13-pins connector has an offset of about 15mm from the breadboard, and this saves also a lot of space on the breadboard.
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 | High Frequency Function Generator with the Maxim MAX038
Using the MAX038 function generator IC, i will make a function generator circuit with many capabilities. I plan to install this project on my workbench and use it for my experiments. According to the chip's documentation, i will have rectangular, sine wave and triangular waveform output up to 20 MHz, with duty cycle adjustment from 15 to 85%.
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 | PCB Etching Bath with Heater and Agitation
Every lab must have an etching tank for home-made PCBs. I make my own etching tank with heater and air-bubbles for agitation. My design is for low production - high quality PCBs. The tank that i use can make up to 10 x 22cm PCBs.
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 | Homemade Foot Pedal For PCB Drills
A really handy project for those who prefer to make their own PCBs, or those who just love the dremel-jobs. A foot pedal that turns on and off the drill makes drilling easier.
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 | PC System Health Monitor
This project is a complete PC System Health monitoring system and has 6 PWM regulated fans with rpm feedback and rpm stabilizer, 9 NTC temperature sensors for the 6 HDDs and 3 positions in the PC box, 5 auxiliary analog inputs for future upgrades and 2 precision temperature sensors for the air inlet and outlet.
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 | PCB Photographic Artwork Transfer UV Cabinet
This is my second PCB UV Photo Transfer cabinet. Unfortunately, the first one was rather old, and i don't really have any photos from the construction. It was made for single sided PCBs, and it used an 150W Hg lamp. This one is for double sided PCBs and has 140 UV LEDs, 70 for each side.
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