Learning PICs @ PCB Heaven
Welcome to our first on-line PIC learning book!
This book will learn you how to program a PIC micro controller. The book has three sections, the beginner's section, the intermediate and the advanced section. Each theory has an on-line test as well to test the knowledge taken from this page. Also, at the end of each section, there are several circuit tutorials fully documented with all code and schematics needed for implementation!
Digital Caliper Protocol
All digital calipers have a communication port built-in, so that it can be interfaced with a PC or a remote LCD screen. The purpose of this experiment is to identify the port pins and try to read the protocol of the caliper. Two experiments will take place, using two different calipers, so that both the BCD and Binary data transmission protocol is covered.
Experimenting with a thermistor
Recently i won a bid for a batch of 10K thermistors. The only thing that i knew when i got them in my hand, was that those things are 10K thermistors. As far as i know, the 10K nominal resistance is at room temperature. But i had to find out if these are PTC or NTC, and also i had to draw their resistance to temperature characteristic line, otherwise they would be useless to me. So i ran some experiments with them...
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.
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.
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.
Miniature 2.4 Volts LED Flasher
A LED flasher suitable for bicycles. It is powered from 2 x 1.5 or even 2 x 1.2 volts (rechargeable) batteries! It sends 2.5Hz pulses to high brightness LEDs, according to the international laws for bicycle safety flashing lights. The LEDs are very bright and can be seen from a very ling distance. What's incredible is the long life of the batteries. The circuit that i am testing has 7 3mm ultra bright (15.000 mcd each) LEDs, and is powered with 2 x 1.2 volts 2500mA rechargeable batteries. I turned it on on the 11th of January 2010 at around 20:00 o'clock. When the batteries run out of energy, i will post the results of the battery life.
Voltage Controlled AC Light Dimmer
This circuit was a request from a friend. He wanted me to design a dimmer circuit, that it could be controlled from the 0-10 Volts DC analog output from a PLC module. The circuit had to be precise and steady. Also, he asked me, if possible, not to use microcontroller.
Electronic Dice
This is a simple but interesting circuit. Not really practical application, but the way that the LEDs are driven to perform the dice numbers is really interesting.
Simple Keycode Lock
This is a very simple and yet secure key-code circuit without the use of micro-controller. The code is hardware programmable up to 4 bits but with slight changes it can grow bigger.
The Origin Of Internet Do you really now the origin of the internet? This article is the general accepted (perhaps unofficial) story of the birth of what we today know as “Internet”.
Electronic waste and recycling Loads of electrical and electronic devices are dumped every day uncontrolled in landfills polluting fields and the underground water. We have to know that electronic waste is highly toxic and full with carcinogenic substances and in a heavily polluted environment such as ours there has to be some kind of guidelines in order to prevent or minimize further pollution.
PC Cooling Methods In this article I will try to present the most known and commonly used ways of cooling a PC. Each method will be described in terms of operation, advantages and disadvantages against the other methods.
To WiFi or not to WiFi Within this article, we will discuss the affects of the wireless networks on the human body, the risks and precautions that can be taken to reduce those risks. The article is based onto official researches for the wireless networks and the use of microwave bands for communications.
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