Altair-Duino
Background
Kit assembly
Operation
Expansion cards
There are several card designs available at dhansel/Altair8800-IOBus. The ones I'm most interested in building are the 88-ACR and the SPI/I2C card. The former is available in kit form (though out of stock as of this writing) from Adwater & Stir, while we will be on our own for the latter.