Line Follower Robot
Microcontrollor AT89C2051 and H-Bridge driver L293D were used to control direction and speed of motor.
Circuit diagram of Infrared sensors and comparators.
Position of sensors, left hand side is side view and right hand side is top view.
Software
Software for write to...
Ethernet Cable – Color Coding Diagram
The information listed here is to assist Network Administrators in the color coding of Ethernet cables. Please be aware that modifying Ethernet cables improperly may cause loss of network connectivity. Use this information at your own risk, and insure all connectors and cables are modified in...
4 Channel RF Remote Control
*already test this circuit. It work well.
Figure 1. RF 4 channels remote Transmitter
This is a very simple RF transmitter circuit that consists of the Holtek HT-12E encoder chip and AM 418MHZ-transmitter module (WZ-X01). Using the hybrid RF xmit/receive modules make building the RF...
Speed up You Firefox Browser
Posted under Tips and Tricks on Monday, 6 April 2009 by 4y133
Here’s something for broadband people that will really speed Firefox up:
1.Type “about:config” into the address bar and hit return. Scroll down and look for the following entries:
network.http.pipelining
network.http.proxy.pipelining
network.http.pipelining.maxrequests
Normally...
How to check your infra red LED
Posted under Tips and Tricks on Wednesday, 11 March 2009 by 4y133
How to check your IR Led?
Only use your handphone camera to check it.
Check Remote Battery - The funniest bloopers are right...
9V battery indicator
This is a very simple 9V low battery indicator circuit which has 2 LEDs, one green which will light up when the battery voltage is higher than 6.9 volts and one red LED which will light up when the battery voltage is bellow 6.9 volts. You can use BC547 … BC549...
Blown Fuse Indicator
Generally, when an equipment indicates no power, the cause may be just a blown fuse. Here is a circuit that shows the condition of fuse through LEDs. This compact circuit is very useful and reliable....
