The AVR ATMEGA8 chip that comes with the basic Arduino board has 8K of memory. This isn’t very much and it quickly fills up even with a small amount of code and variables. The Arduino system now supports the ATMEGA168 chip as well, which has 16K of memory–comparatively huge! However Arduino 0006 environment does not […]
Bootloader for ATMEGA168 with Arduino Read Post »
Heather, Zach and myself created four logic gates out of Legos scrounged from various Lego Technics vehicle model kits. Here’s an AND gate made using strings: 00 position 01 position 10 position 11 position, output is activated MOVIE! Here’s an Inverter created with rods: 0 postion, 1 output 1 postion, 0 output MOVIE! We made
Heather, Zach and myself created a two-bit adder using laser-cut foam core board, wire and marbles. We initially tried a “boat” design similar to the one used in our one-bit adder. The boats didn’t quite come together properly, so we decided to try Zach’s secondary design that was cut at the same time. It worked
Two-bit Mechanical Adder Read Post »
This moisture sensor circuit is based on a design by Forrest Mims, and adds a Shunt Ammeter so that the output is 0 to +5 Volts instead of amperes. We are using it for the ITPlants project, so that when soil moisture drops below a minimum, the plant can make a phone call for help.
Moisture Sensor Circuit Read Post »
