Pssst, hey kid... wanna do Worked All States in a weekend? This is Sweepstakes Phone weekend. There will be many, many operators on all trying to make as many phone contacts as possible beginning mid-day Saturday. Hope to put a bunch of you in the logbook!
73,
Tim, N9PUZ
Saturday, November 21, 2009
Thursday, November 19, 2009
MCP9700A Temperature Sensor Arduino Library
I've done a little polishing on my code for using the Microchip MCP9700A Temperature Sensor and converted it to a library for the Arduino. I'm releasing it under the GPL in case it might be of use to anyone else. You can download it here:
MCP9700A.ZIP
This is my first attempt at an Arduino library. Comments welcome.
73,
Tim, N9PUZ
MCP9700A.ZIP
This is my first attempt at an Arduino library. Comments welcome.
73,
Tim, N9PUZ
Tuesday, November 17, 2009
Temperature Sensing on the Cheap
Recently I was experimenting and needed a temperature sensor in a TO-92 type package. After a little searching I discovered the Microchip MCP9700A. This sensor is a bargain at about $0.36 each in single quantities from Mouser.
The interface is dead simple. Vcc, Ground, and an output that you can hook directly to an ADC input of a micro. The part I chose measures from -40C to +125C and outputs 10 millivolts per degree. If you need Fahrenheit temperatures it's easy enough to do the conversion once you know Celsius.
I tested the sensor out with one of the Arduino boards and easily had it measuring and displaying room temperature in about hour.
73,
Tim N9PUZ
The interface is dead simple. Vcc, Ground, and an output that you can hook directly to an ADC input of a micro. The part I chose measures from -40C to +125C and outputs 10 millivolts per degree. If you need Fahrenheit temperatures it's easy enough to do the conversion once you know Celsius.
I tested the sensor out with one of the Arduino boards and easily had it measuring and displaying room temperature in about hour.
73,
Tim N9PUZ
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