Filters - OpenRadioMiniconf edit / delete

Building HF transmitter filters using air-cored coils, wound on a pencil. This is surprisingly effective!

to amateur coil electronics filter hf inductor lpf radio transmitter ... on 14 March 2015

Espressif ESP8266 WiFi-serial interface : weekend die-shot : ZeptoBars edit / delete

I really like the inductors -- old-fashioned pancake coils in miniature!

to chip coil die electronics inductor photography reverse-engineering ... on 13 March 2015

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