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Showing posts from February, 2023

Infrared audio transmitter and receiver

  This is the final lab from the analog half of Learning The Art of Electronics . I've had the thing assembled in some solderless breadboards for over a year and decided to make some PCBs for it. Here are some pictures of the assembled PCBs: PCB milling (FlatCAM): 0.2 mm 30ยบ V bit, 20000 rpm, 300 mm/min, 50 um depth, autoleveling. Isolation (2 pass) + Copper clear on selected regions (missed some). 0.8 mm & 1 mm holes. And the unpopulated boards out of the CNC machine: The breadboard prototype can be seen on the "About" page of this blog.