The Arduino BNC sensor shield is designed for very high impedance low voltage sensors (pH, ORP etc.). It has 2 BNC connectors as well as a variable resistor to control the gain. Read more »
The arduino port expander shield is an I2C shield that adds 16 digital outputs to your arduino. You could use it to control LED's although it was initially designed to control SSR's on an aquarium. Read more »
The Arduino I2C / SPI / Onewire shield is pretty much a board with pins which would allow you to connect these types of devices. The I2C already has the pins pulled up and the Onewire portion has the pin pulled up as well. Read more »
Originally the Arduino RTC / EEPROM shield was going to be incorporated into a single board for an aquarium controller, but since none of these boards exist (to my knowledge) I decided to break them up into shields which you can use. Read more »
The Arduarium Controller is a project to build a modular open source aquarium monitor/controller. Right now it's in the beta stage as the PCB has been designed and sent to the fab house. Read more »
