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HTC Reviews, Tips and Tricks

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Free HTC is an unofficial HTC information portal. The site is updated daily with new tips, tricks, news and reviews regarding HTC devices.

Recently, FreeHTC.com's post regarding a new device released by AT&T was featured on many of the top Tech sites including Engadget, TheBoyGeniusReport, Gizmodo and many more.

We work hard everyday to bring our readers the most relevant information regarding HTC products and news. read more...
permapage | score:9970 | -TechBoy78, January 31, 2009

A temperature and humidity data logger project

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Temperature and Humidity Data Logger

This project uses BasicStamp 2P (also you can use PIC, Atmel, 8051...) to interface with a DS1307, SHT15, JP Module and 16x4 LCD display. Code used is standard PBasic 2.5, it should work on most BasicStamp chips.

The project is a data logger demonstration program. It can record temperature and humidity data to MMC/SD card with date and time. Press the temperature unit select button switch to select Celsius or Fahrenheit. The data can be processed to the virtual XY chart or Polar Chart through the website ( www.jianpingusa.com/jpchart ). read more...
permapage | score:9965 | -oldspring, November 17, 2008

Wireless Antenna Types

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There are three main categories of antennas:

  • Omni-directional - Omni-directional antennas radiate RF in a fashion similar to the way a table or floor lamp radiates light. They are designed to provide general coverage in all directions.
  • Semi-directional - Semi-directional antennas radiate RF in a fashion similar to the way a wall sconce is designed to radiate light away from the wall or the way a street lamp is designed to shine light down on a street or a parking lot, providing a directional light across a large area.
  • Highly-directional - Highly-directional antennas radiate RF in a fashion similar to the way a spotlight is designed to focus light on a flag or a sign. Each type of antenna is designed with a different objective in mind.
read more...
permapage | score:9951 | -qjokobloon, November 12, 2008

CompTIA A+ Certification Tutorial

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A+ Certification is awarded by CompTIA, and is widely recognized as a premier certification in the area of computer hardware and operating systems. The tutorial covers recent A+ Essentials exam objectives as listed below:

1.0 Personal Computer Components
2.0 Laptop and Portable Devices
3.0 Operating Systems
4.0 Printers and Scanners
5.0 Networks
6.0 Security
7.0 Safety and Environmental Issues
8.0 Communication and Professionalism

A+ Essentials together with A+ IT Technician exam enables a candidate to obtain CompTIA A+ Certification. Instead of A+ IT Tech., one can also take any one of available optional exams (viz. A+ Remote Support exam, and A+ Depot Tech. exam). read more...
permapage | score:9946 | -Vijay, November 24, 2008

Electronic Circuit Projects

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Circuit-Projects.com is an electronic circuit schematics archive with full descriptions, PCBs and layouts. read more...
permapage | score:9934 | -Eisac Prevot, December 24, 2007

Electronics Resources

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ePanorama.net is a web site, which is dedicated to offer information on electronics found from the web.

Every link in this site is carefully chosen and handpicked. ePanorama.net was originally born from Tomi Engdahl's Electronics Info Pages. All the information found from there can now be found here. The content of this site is continuously renewed so that new and useful information is available to electronics professionals students and hobbyist.

At the moment we have broad scope of users from several countries. Users are professionals, hobbyist and students. Over 1.300.000 pages are downloaded from this site every month. read more...
permapage | score:9924 | -epanorama, August 1, 2007

How to build a Mini ITX Linux PC

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This is one sweet and quite tiny DIY system...
My research had led me to believe that the best motherboard choice for my purposes was going to be a VIA EPIA which featured an embedded processor. After talking it over with VIA we dedicided that one of their MII motherboards would be best. Originally I wanted something fanless, like the MII6000, but due to availability we eventually settled on the MII10000. This motherboard features a 1.0 GHz VIA C3/ VIA Eden EBGA processor and the chipset is composed of a VIA CLE266 North Bridge and a VIA VT8235 South Bridge. The motherboard has some extras too, like built-in CF and PCMCIA readers.
read more...
permapage | score:9918 | -Ray, February 16, 2006

Flash Memory Tutorial

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Flash memory is a form of EEPROM (Electrically Erasable Programmable Read-Only Memory) that allows multiple memory locations to be erased or written in one programming operation. In other terms, it is a form of rewritable memory chip that, unlike a RAM(Random Access Memory) chip, power
supply is not required to hold the contents. It is commonly used in memory cards, USB flash drives, MP3 players, digital cameras and mobile phones. Flash memory is also an example of a Non-Volatile Read Write Memory (NVRWM).

1. Technical Overview of Flash emory

1.1 Operation Principles
1.2 Structure and Operation of Flash Memory

2. Flash Memory History
3. Limitation of Flash Memory
4. Low-level access

4.1 NOR memories
4.2 NAND memories
4.3 Difference between NOR and NAND memories

5. Flash file systems
6. Capacity of Flash memories
7. Data Protection
8. Security
9. Types of Flash Memories
9.1 Mobile device memory
9.2 Compact flash memory
9.3 USB Flash drives
10. Hard disk drives vs. Flash drives
11. Applications of Flash Memory read more...
permapage | score:9898 | -Vijay, July 6, 2008

Surface Mount Components - An Introduction.

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Surface mount components are being used extensively these days. Most of the electronic gadgets that we use, such as mobile phones, digital cameras, CD players, LCDs, etc. use surface mount components extensively. A comprehensivetutorial on SMT components is available at Tutorialsweb.com. The contents are given briefly below:

PassiveComponents: Surface mount passive components including resistors, capacitors, and inductors were discussed.

Active Components: Examples of surface mount active components are diodes, Transistors, and ICs. ICs can be further divided in to the following categories:

  • SOICs (Small Outline Integrated Circuits)
  • SSOP (Shrink Small Outline Package)
  • TSSOP (Thin Shrink Small Outline Package)
  • SOJ (Small Outline J-leaded package) and others

Surface Mount Integrated circuits that are available in Quad-in-Line include the following:

  • QFP (Quad Flat Pack)
  • PGA (Pin Grid Array)
  • BGA (Ball Grid Array)

Chip-on-Board (COB) is a special IC that uses bare die for bonding on to the PCB. It is commonly used where very high component density is required, and where lead lengths may affect the electrical parameters and thurs the functioning of the circuit.

Please visit the website for complete tutorials on SMTcomponents and SMTAssembly.

read more...
permapage | score:9893 | -Vijay, November 27, 2006

2005 CPU Chart

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This chart lists pretty much everything available including the modern dual-core chips from AMD and Intel. It's filled with such useful graphs as clock frequency as it has grown over time and thermal dissipation.

Benchmarks are, of course, included, as are histories of both AMD and Intel processor families. read more...
permapage | score:9888 | -Ray, November 23, 2005 (Updated: March 23, 2007)

RF Cables: Articles, Products, and Vendors.

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The website rfcables.org is intended to provide expert review of rf and optical cables used in high-tech environment.
The site currently includes articles, product news, and listing of some leading rf and optical cable manufacturers. The site offers member registrations. A registered member can submit articles, products, or product reviews. Please visit the site at rfcables.org and leave your feedback or suggestions for improvement to webmaster(at)rfcables.org. Thanks. read more...
permapage | score:9875 | -Vijay, August 11, 2005

HDMI, DVI , Component Video Cables and Interconnects Explained

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HDMI, DVI , Component Video Cables and Interconnects Explained

As the HDTV market continues to heat up, consumers are in need of being educated on the latest technology in order to make intelligent purchasing decisions. There are a plethora of articles explaining the technical pros and cons of the 3 dominant HDTV display technologies namely: LCD, Plasma, and DLP. However, one all- important, but overlooked feature in selecting a HDTV set is the type of HD video connection. The video connections available for HDTV are: component video, DVI (digital video interface) and HDMI (high definition multi-media interface). We will discuss briefly the pros and cons of each. read more...
permapage | score:9873 | -jeff su, November 24, 2005 (Updated: March 21, 2007)

Bare Metal Bits: Bare Bones Computer and Parts Reviews

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Baremetalbits is a new hardware review site. They specialize in bare bones computers, parts, and peripherals -- with an emphasis on the foundations for gaming systems. One article is a review of the Small Form Factor computer from Biostar, the IDEQ 210V, a Socket-A cube system. Other articles are reviews of the Abit KN8 Ultra Socket 939 Motherboard, the Shuttle SN25P SFF bare bones system and the AMD Athlon X2 3800+ dual core CPU. read more...
permapage | score:9868 | -Ray, October 15, 2005 (Updated: October 28, 2005)

HDTV Wonder and 1080i

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Recently I decided to make my own quick and dirty HD-DVR by installing an ATI HDTV Wonder. Installation was pretty painless and since I had a ATI Radeon 9200SE I finally got everything working smoothly (Note: in order to get the ATI Multimedia Software installed correctly I had to download the latest drivers from the ATI website).

When I was finally up and running I could watch digital 480i and 720p channels (the included antenna is quite nice since I am about 25 miles from the broadcast station). With the 1080i channels, however, I could see that I had a strong signal and the audio was coming in perfectly but I couldn’t see any video. Also, the 480i and 720p playback was a little choppy - every minute or so the video and audio would skip - it was definitely still watchable, but I wanted to address this problem as well. read more...
permapage | score:9862 | -pwily, February 24, 2006

HDTV: 1080p vs. 1080i

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Here's a high definition TV cheat sheet -- what you need to know to make the decision between 1080i vs. 1080p.
In this case, the subject is HDTV resolution, and 1080p resolution in particular. This seems to be on everyone's minds as we head into the holiday buying season and we're faced with more HDTV buying choices than ever before. Not a day goes by without someone asking whether they should just buy a "standard" 720p/1080i set or step up and pay the extra bucks for a higher-resolution 1080p set. Or what it all means. And so, I've tried to condense the whole discussion into a neat, little cheat sheet. Read on for the quick and dirty lowdown on 1080p.
read more...
permapage | score:9851 | -Ray, December 4, 2005

Spread Spectrum Communications Introduction

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A tutorial is available on Spread Spectrum Communications, and Products. A brief review of the contents is given below:

1. What is spread spectrum?
2. Origins of Spread Spectrum Communications
3. Advantages and Applications Spread Spectrum Communication
4. Classification of SS Modulation Systems
- a. Direct Sequence (DS) SS Systems
- b. Frequency Hopping (FH) SS Systems
- c. Time Hopping (TH) SS Systems
5. Spread Spectrum enabled products and Manufacturers
6. Important Terms
7. References read more...
permapage | score:9850 | -Vijay, May 15, 2006
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