Complete Rascal development kit with 4 GB memory card and power supply
The Rascal is a small, open-source computer designed for connecting sensors, motors, and whatever else you can build to the internet. It's about 5 cm x 10 cm (2 inches by 4 inches).
The fourth production batch of Rascals is now up for sale. These are the second run of hardware version 1.3, which is nearly identical to version 1.2, but some of the capacitor footprints were modified slightly to prevent solder bridging. These Rascals ship with the new Cooties software release.
Precision voltage shield
The precision voltage shield is an 8-channel analog-to-digital converter that plugs into Arduinos, Rascals, and anything else with Arduino headers.
The hardware is reasonably well-tested, but software to run the shield is still in beta development. At present, the shield can measure 8 channels at 735 Hz when plugged into an Arduino Uno loaded with the beta software.
The first batch of shields was assembled with 14-bit A/D converters (the Analog Devices AD7607), meaning that the resolution is 0.6 mV, which is better than most commercial multimeters. The next batch will likely be assembled with 16-bit converters (the Analog Devices AD7606). The price is the same for both versions.
PCB only for Precision Voltage Shield
Just the PCB for the Precision Voltage Shield. You'll have to do the soldering yourself. Most of the components are surface mount, which makes it hard, but not impossible, to solder by hand.
Note that assembled shields are also available in the store.
If you don't want a Rascal now, but might want one in the future, sign up for the announcement list (low traffic; you can unsubscribe).