LM35 — Volts and Bytes

Simple Sensor Webserver

March 17, 2012 By Jer Leave a Comment

Probably, some of you have tried buying cool but cheap products from Ebay. Like some of you, I also have bought items from Ebay several times already. One of the items that I got from Ebay is a small ENC28J60 based ethernet module.

As you can see from the image above, the ENC28J60 module is very small. The PCB is more or less one-inch square which is almost as small as the included ethernet jack.

I decided to make a simple sensor webserver using the ENC28J60 that I got from Ebay. I knew that there were already several sensor webserver projects posted on the internet but I couldn’t resist the temptation of making another one because I had a couple of sensors and an extra microcontroller lying around. [Read more...]

Filed Under: Projects Tagged With: Arduino, AVR, CM-R, ENC28J60, Ethernet, Humidity Sensor, Internet, LM35, Sensor, temperature, Webserver

DIY Digital Thermometer 2

August 31, 2010 By Jer 13 Comments

Few months ago, I published my first DIY digital thermometer. However, like any simple projects/prototypes, that project needs some improvements. Previously, I used a voltage regulator that has a 100mA rating. Though it was able to source current to the whole circuit, it gets too hot easily. Another problem with that was that the voltage regulator was very close to the sensor. Since the voltage regulator heated up easily, it always affected the temperature reading of the digital thermometer.

To solve those problems, I came up with a second version of digital thermometer. [Read more...]

Filed Under: Projects Tagged With: ADC, ATtiny26, AVR, LED, LM35, Sensor, seven segment display, temperature, thermometer

DIY Digital Thermometer

March 27, 2010 By Jer 4 Comments

This project is a digital thermometer that uses a microcontroller with analog-to-digital capability, an analog temperature sensor, and some seven-segment displays. The circuit is pretty simple and it can be powered by a 9-volt battery which makes it very portable.

Please continue to read as I go a bit deeper to the details of what builds this easy project. [Read more...]

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