Old days Harddisk

This harddisk was made in 1988 and has a capacity of 20MB, you may just store a few  pictures today.

This harddisk has a step motor to drive the heads which in modern HDs have electromagnetic coil magnet driver.

I like very much these kind of piece of art.

.

Continue reading Old days Harddisk

Multiple BH1750 on i2c bus Digital Light Sensor + Arduino (16xBH1750)

20140513_145055

This project was made with the collobaration of my brother who is proffessor at the faclty of architecture at Selcuk University Konya Turkey. He asked me

for a system which could  measure  light intensity in 16 different points in a house. And then I started to  make search and decided to do the job with

  • Arduino mega.
  • We purchased 20 pcs BH1750 light sensors from eBay at a very good prices.

– Two pieces CD74HC4067 Analog/Digital MUX Breakout 

Continue reading Multiple BH1750 on i2c bus Digital Light Sensor + Arduino (16xBH1750)