One-plantAnimal
Ultrasniffer (2023)
Ultrasniffer is an EMI sniffer along the lines of projects by Nick Collins, Christina Kubisch, the LOM Elektrosluch, or the Make Mag Elektrosluch project with a twist: there is a sample-and-hold which allows one to heterodyne ultrasonic EMI waves back down into the audible range. The ultrasniffer retains the general character of an EMI sniffer with some extra squelchy aliasing artifiacts, and makes some signals not audible with a normal sniffer apparent.
Figure 1. Ultrasniffer.
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