Monthly Archives: April 2010

Digital Thermostat

Posted on April 28, 2010 by Rust
A Digital Thermostat

The figure below shows the schematic of a Digital Thermostat. The output of LM35 is digitized by the A/D. The LM35 is a temperature transducer IC with an output of 10 mV per ‘C. This 10 mV corresponds to 1/2 … Continue reading →

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Automatic Control for LCD Panel Backlight

Posted on April 28, 2010 by Rend
Automatic LCD Panel Backlight Control

This is an Automatic LCD Panel Backlight Control circuit. This is a simple low cost implementation of an LED controller. It can compensate for aging effects and the temperature typically found in high power LEDs. This circuit consist of a … Continue reading →

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Digitizing a LVDT Transducer Interface Output

Posted on April 28, 2010 by Rust
Digitizing a Transducer Interface Output

Digitizing transducer interface output voltage is shown on circuit diagram below. The transducer in this case is the NE5521, an LVDT (Linear Variable Differential Transformer) Signal Conditioner. To ensure that the input to the A/D does not go excessively beyond … Continue reading →

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