Category Archives: Data

Arduino – logging accelerometer

This logging accelerometer is set up using Arduino UNO compatible microcontroller SD card adapter Three axis digital accelerometer Various cables, breadboard and an sd-card (any size will do) The library for using the SD-card comes with the arduino IDE v … Continue reading

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Simple ajax based autocomplete in jquery

Starting to abandon prototype.js to use what seems to be the new standard jquery – one of the first things I want to do, is to make some autocomplete fields fetching values from a data base. I have made an … Continue reading

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Automatic datavalidation in postgres

How to stop bad data from propagating – automatically check what goes into a postgres database Continue reading

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How to move a VboxManager virtual machine to another host

Officially, to move a vbox virtual machine to another host, you have to clone it. But – what if vboxmanager for some reason has stopped working on the host you want to move the vms from? Continue reading

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Sensor testing

Comparing measurements of temperature and humidity using DHT11, DHT22, BMP085 and DS18B20. Continue reading

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Arduino and BMP085

The BMP085 is a barometric and temperature sensor. I’ve got one on a breakout board from geeetech. Using this and an arduino, it is possible to build an electronic barometer. It can be connected to an arduino uno or nano: … Continue reading

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Reading temperature data out of postgres

I have set up a system logging temperatures (and later hopefully also other parameters) to a postgres database. The data are now read out and presented as an svg-graph. (this may not work in some older browsers, i.e. msie< 9 … Continue reading

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