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Month: November 2010

Determining your Dallas 1 wire address

1-Wire devices, such as the DS18B20 digital temperature sensor, are great to use with Arduino boards because you can connect many of them to a single IO pin. The freely available software libraries and example code make using 1-wire devices

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The Reverse Geocache™ Puzzle Box

I recently read a story about a wedding gift that gave a distance to a destination, and would not open until the destination was reached. It is based upon a mix of Arduino, a gps sensor, and good old inventiveness baked

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The DS18B20 Digital Thermometer

Dallas Semiconductor (Maxim) produces a line of “One-Wire” devices, that allow multiple sensors to connect to a single data pin on a microcontroller. GND and +5vdc are also needed. I’ve put together a single sensor DS18B20 (soon to be expanded

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CdS Light Sensor

I’ve been playing with my Cadmium Sulfide (CdS) photoresistors, and have put together a basic light sensor. I’m outputting raw values, so there is no correlation with solar insolation. If anyone knows some cool formulas that would convert the output to sun

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The $2 Thermistor Temperature Sensor

A thermistor makes for a very inexpensive temperature sensor, under $2 for the thermistor and the 10k ohm resistor, not counting the $45 for the Arduino and LCD display:       Become the Maker you were born to be.

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Thermistors, Ethernet Shields, and More

Yesterday I received a package in the mail from Hacktronics. Call it an early Christmas present. Inside was a package of Thermistors, 10k ohm resistors, a breadboard, and a Ethernet/Micro SD card Shield. Stay tuned for a variety of projects

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