rocketnumbernine

Andrew's Project Blog: Hardware, Software, Stuff I find Interesting

Posts with tag 'arduino'

This is a description of my first useful Arduino project - The Finger. The external USB drive that's a backup device to my Mac Mini media server doesn't cope well with being on 24/7 ...
The following describes a quick project to create 'music' (ok 'sound') with a piezo-electric transducer driven directly from an AVR microcontroller and as few other components as possible. Driving the Piezo-electric transducer. Just about all AVR microcontrollers have one or more counters/timers that can be driven from the main clock or an external signal ...
I've been thinking of getting a "cheap" computer based Logic Analyzer for some time ...
This is a follow on to "Using SPI on an AVR (1)" and illustrates using SPI to communicate with a real time clock chip, it also illustrates use of external interrupts to initiate code on the microcontroller. Maxim DS1305 Real Time Clock The DS1305 Serial Alarm Real-Time Clock is an 18 pin DIP clock chip ...
I've been asked for the code used to read the MAX6675 Thermocouple-to-Digital Converter used to measure the temperature in my ongoing SMD Reflow Oven project ...
This is a follow up to Using SPI on an AVR (1) and Using SPI on an AVR (2) articles which illustrated using an AVR Microcontroller to communicate with some simple SPI Slave devices. This entry shows two AVR Micro controllers communicating with each other through SPI - one acting as Master and one as Slave ...
In a previous article I described insulation of a mini/toaster oven with the aim of using it for table top reflow soldering ...
This article details a simple approach to decoding the output of a 2 bit incremental Rotary Encoder ...
Looking for something interesting to reach the minimum value on a component order, I picked up a couple of Maxim ICM7128 LED drivers, actually I got some Intersil ICM7228 which is interchangeable ...
I don't have and have never really had the desire for a signal generator, but have wanted to play with the [AD9851 DDS chip][AD9851] (a digitally controllable 0-180MHz sine wave generator) for awhile and managed to win an [ebay][] auction for a "AD9851 Module DDS Signal Generator with Circuit Diagram" for $23.50 including shipping from China to Europe, that's cheaper than [digikey][] charge for the chip alone! AD9851 DDS Board The board arrived in less than a week and was marked as "valued at $3" so no customs were charged ...
Two previous articles described the my attempts to create a Reflow Oven. I finally thought it time to document the final construction. Thermocouple Reading a K-Type Thermcouple from a microcontroller with a MAX6675 chip was described here ...