Discover How To Create Iphone Apps Easily With No Programming
Experienced Required. Learn From Some Of The Top Iphone App Developers
To Get Your App Created Now.
Monday, July 2, 2012
Iphone And Ipad Tutorials And Starter Kits
Posted by Unknown on 4:23 AM
Professional Tutorials And Starter Kits To Help Iphone/ipad Developers
Make Their Own Apps And Games. Includes Space Game Starter Kit - Full
Source Code And Tutorials That Show You How To Create A Cool Space
Shooter Game From Scratch!
How To Convert Fluorescent starter to Thermal Switch
Posted by Unknown on 4:09 AM
Fluorescent starter is essentially two bimetallic strips in a sealed glass capsule, with a small gap between them.
The principle of this experiment is Metal expansion and contraction .
Materials:
1- 12 volt CPU Fan.
2- 12 Volt supply.
3- Fluorescent starter.
4- Candle.
Steps:
1- Break the starter glass and try to not damage the metal inside (Take all safety precaution when you do that to avoid any injury).
2- Make sure that there is a small gap between two metal as shown in attached picture.
3- Connect the circuit as attached in the first circuit diagram and fix the starter about 2 cm above the candle.
When the candle lighted up ,the starter metal will expand and attached together , the fan will turn on and turn off the candle ,the two metal will de-attach and turn off the fan.
Note that CPU fan is a brush less dc motor and it will not cause spark in starting ,the spark can damage the metal and it will not work for long time ,so if you connect a load that take more current and cause a spark in the starter you can use transistor showed in the last diagram to avoid this issue .
if you find this tutorial useful to you , please vote for it in the Electronics Tips & Tricks contest.
Fastest way to Hack RC Car H-Bridge
Posted by Unknown on 4:07 AM
I
have some broken small RC car without remote control and I was
interesting to hack the H-bridge of these car and connect them to micro
controller circuit in order to make for example a line follower robot
or obstacle avoidance robot.
The common circuit of RC car consist of :
1-Receiver circuit which is define the frequency that the car will work on( for example 40Mhz or 27 Mhz).
2-Controller chip (De-Multiplexer circuit).
3-Dual H-bridge circuit for driving two DC motor (one for backward ,forward and the other for the steering).
you can see that from the above picture, it's a little complicated to find the base of transistors that will make the motor work ,also it will take a lot of time, so instead of that I download datasheet of the controller and from chip pins diagram we can trace the H-bridge pins directly.
RX-2 Controller Chip:
RX-2 is a five function receiver chip work as a De-multiplexer and the multiplexer of this chip called TX-2 which is located in the remote control of the RC car .it's a very interesting IC and compatible with RF and infrared (check attached datasheet ).
Now from the pin diagram shown in the next picture you can locate the pins of H-Bride (PIN 6 ,7 for right and left ) and (PIN 10,11 for backward and forward).
By connecting +5 volt to these pins you will be able to control the motors but be careful don't connect 5 volt to right and left or backward and forward on the same time ,you might burn your circuit (depend on circuit design) .
Now you can remove RX-2 chip and connect the H-bridge pins to a micro controller but it's better to connect a 330 ohm resistor between them for current limitation.
if you like or find this tutorial useful to you , please vote for it in the Electronics Tips & Tricks contest.
The common circuit of RC car consist of :
1-Receiver circuit which is define the frequency that the car will work on( for example 40Mhz or 27 Mhz).
2-Controller chip (De-Multiplexer circuit).
3-Dual H-bridge circuit for driving two DC motor (one for backward ,forward and the other for the steering).
you can see that from the above picture, it's a little complicated to find the base of transistors that will make the motor work ,also it will take a lot of time, so instead of that I download datasheet of the controller and from chip pins diagram we can trace the H-bridge pins directly.
RX-2 Controller Chip:
RX-2 is a five function receiver chip work as a De-multiplexer and the multiplexer of this chip called TX-2 which is located in the remote control of the RC car .it's a very interesting IC and compatible with RF and infrared (check attached datasheet ).
Now from the pin diagram shown in the next picture you can locate the pins of H-Bride (PIN 6 ,7 for right and left ) and (PIN 10,11 for backward and forward).
By connecting +5 volt to these pins you will be able to control the motors but be careful don't connect 5 volt to right and left or backward and forward on the same time ,you might burn your circuit (depend on circuit design) .
Now you can remove RX-2 chip and connect the H-bridge pins to a micro controller but it's better to connect a 330 ohm resistor between them for current limitation.
if you like or find this tutorial useful to you , please vote for it in the Electronics Tips & Tricks contest.
Saturday, June 30, 2012
The Ultimate Guide To Password Recovery And Management
Posted by Unknown on 6:24 AM
After years of consulting on the matter of password recovery,
I’ve decided to make an ebook that concentrates all the experience I’ve
gathered on this topic, that have helped hundreds of people around the
globe the last 2 years.
The ultimate guide to password recovery and management
provides many methods to recover passwords from windows accounts and
also windows programs, such as microsoft office and instant messengers,
and also websites.
Now, recovering a password is one thing, but the best is for you to
not even lose it, so I’m also going to show you how to manage them
effectively.
Fix Windows Errors & Optimize Your System
Posted by Unknown on 6:12 AM
No Blue Screen, No Lock up, No Errors, Less Garbage Files → More Smooth System Running.
* How to Optimize Your PC?
Scan
Fix System Errors
Improve Startup
Clean Registry
Defrag Disk
Optimize System Settings
Improve Startup
Clean Registry
Defrag Disk
Optimize System Settings
Healthy PC
Supported Operating System
Wide system support
Windows XP/2000/Vista/7/8,32 & 64 bits.
Windows XP/2000/Vista/7/8,32 & 64 bits.
CCleaner - the number-one tool for cleaning your Windows PC
Posted by Unknown on 5:49 AM
CCleaner is the number-one tool for cleaning your Windows PC. It protects your privacy online and makes your computer faster and more secure. Easy to use and a small, fast download.
Cleans all areas of your Computer
Internet ExplorerTemporary files, history, cookies, Autocomplete form history, index.dat.
FirefoxTemporary files, history, cookies, download history, form history.
Google ChromeTemporary files, history, cookies, download history, form history.
OperaTemporary files, history, cookies.
SafariTemporary files, history, cookies, form history.
WindowsRecycle Bin, Recent Documents, Temporary files and Log files.
Registry Cleaner
Advanced features to remove unused and old registry entries.
Advanced features to remove unused and old registry entries.
