Over in the forum, we’re designing a software-defined radio modeled after Jeri Ellsworth’s Hackaday post from earlier in the summer.  We ordered PCBs for the first revision perhaps a bit too hastily, as some forum members with valuable experience in the area found a number of shortcomings in our design.  Those have been corrected (we hope!) with this latest round of updates.

Changes that have been made include moving to a better oscillator module (wider frequency range, better stability, less phase noise) and to an external 24-bit ADC (for higher dynamic range).  We have a few boards of the old design already fabbed, but things like work and school keep getting in the way of building up a prototype or two to start coding.

Check out the schematic and layout over on github (or just grab the latest NBitWonder Eagle Library update), and let us know what you think in the forum!  We might not always respond right away, but we value your input.