If you’ve lost interest in that DVB dongle you bought to give software defined radio a try you should bust it back out. [Harrison Sand] just finished a guide on how to use SDR to listen in on ...

That’s generally a job for an oscilloscope, but if you’re clever, an SDR dongle can make a dandy crystal checker too. The back story on [OM0ET]’s little hack is interesting, and one we hope ...