Lcd's cover a wide range of applications including led tv's to cmputer monitors, PDAs, digital monitors and much more. LCD backlight mainly consists of a light source, diaphragm, light leading board and a plastic frame. Cold-cathode fluorescent lamps (CCFLs) have a phosphor coated glass cylinder with cathodes at each end. The CCFL inverter accepts a low-level DC input voltage and provides a high-level AC output to run the backlight CCFL tube. Here's a CCFL tester circuit that often needed to check a faulty LCD backlight circuit for finding the dead components.
Tuesday, March 25, 2014
Monday, May 10, 2010
Remote Control Tester Circuit
Here is an infrared remote control tester circuit that can be made without spenting much money.This IR tester build around an infrared reciever module TSOP1738. We can observe the remote control state by listening to the buzzer sound. The circuit is very sensitive and it support a range of about 5 meters.
Saturday, May 8, 2010
Simple Transistor Tester Circuit
Most of us needs to test electronic components while in work bench. What should you do if your multimeter s battery become weak? Here is a simple circuit to test transistors, diodes and other components. The circuit is very simple and you only need to connect the two leads of the testing components.
