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Muffle optional? A series of boards, e.g. Https://learn.adafruit.com/adafruit-feather-m0-radio-with-rfm69-packet-radio Adafruit Feather 32u4 FONA Footprint for Mini-Circuits case GP1212 (https://ww2.minicircuits.com/case_style/GP731.pdf) following land pattern PL-236, including GND vias (https://ww2.minicircuits.com/pcb/98-pl079.pdf Footprint for Mini-Circuits case YY161 (https://ww2.minicircuits.com/case_style/YY161.pdf) using land-pattern PL-049, including GND-connections and vias (https://ww2.minicircuits.com/pcb/98-pl049.pdf Ai Thinker Ra-01 LoRa module wireless zigbee 802.15.4 flash crypto ATSAMR21G18 AT45DB041E TECC508A U.Fi Class 4 Bluetooth Module with on-board components c6741b48f0 More random files 7e24b3de83 Notes from debugging Notes from MK's PCB livestream - avoid non-circular holes in footprints whenever possible; some fabs charge more for ovals - make power connection traces larger; MK uses a CA3080 OTA, an expensive and rare chip these days ($3/ea on amazon, maybe fakes) VCA MK's VCA Probably a straightforward build: one op-amp, four transistors and some example modules schematic start, and some example modules Envelope/Envelope.kicad_pcb | 2 pin Molex connector 2.54 mm spacing Pin header 2.54 mm spacing | | | S3 | 1 | SW_SPDT | SPDT miniature toggle switch ON-ON SPDT miniature toggle switch could be done at the first if (preg_match("@.*()@", $article['content'], $matches)) { $article['content'] .= "

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