Archive for January, 2014

Real Time Clock – DS1307

Real Time Clock - DS1307

For my Topsy Turvy clock project I’ve purchased an I2C clock module based on the DS1307 Real-Time Clock chip. As mentioned this came without a battery to keep the post office happy. Although looking at the current wording of the

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More small steppers

More small steppers

The output of my stepper motor feeds into a gearbox which I’ve been told has a ratio of approximatly 64:1. During the research of this project I came across a discussion about why the gear ratios were not exact nice

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Spotting Drills vs centre drills

Spotting Drills vs centre drills

In MEW 212 Chris Smith from Taunton chastises Harold Hall for using centre drills for starting a hole and recomends using a spotting drill or stub drill instead. This is something that I also do so I thought I’d investigate

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Arduino Micro Review

Arduino Micro Review

The Arduino Micro is one of the newer Arduino models but it does not get much of a mention. Like the Leonardo it has a single microcontroller chip, the ATmega32u4 which is an 8bit controller with 32K of Flash and

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Small stepper motors

Small stepper motors

For my clock project I needed to control the position of the hands. My options were continuously rotating servos or stepper motors. I found some small 28BYJ-48 stepper motors and gearbox with ULN2003 driver boards on the internet so I

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Smart?

Smart?

Back in Nov 2012 I backed a project on Kickstarter for a small Arduino like microcontroller system called “Smartduino” which I hoped to use for an internet connected humidity monitor. About this time last year I was expecting to see

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