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Adaptive brightness control for seven segment LED displays

Posted on Friday, July 6th, 2012 in demonstrations, DIY by DP

Raj made a temperature and relative humidity meter to demonstrate adaptive brightness control on a seven segment LCD. The system uses a LDR light sensor in a closed loop to continuously adjust the brightness of the LEDs.

The objective of this project is to illustrate a technique of implementing adaptive brightness control to seven segment LED displays. It consists of a closed loop system that continuously assesses ambient light condition using an inexpensive light-dependent resistor (LDR) and uses that information to adjust the brightness of the display. For the proof of concept, the technique is applied to construct a digital temperature and relative humidity meter that adapts the brightness of the seven segment LED displays to the surrounding lighting conditions.

This entry was posted on Friday, July 6th, 2012 at 11:00 am and is filed under demonstrations, DIY. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

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