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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
I really like the inductors -- old-fashioned pancake coils in miniature!
to chip coil die electronics inductor photography reverse-engineering ... on 13 March 2015
Ham radio projects, including instructions on how to wind coils, a wide range of low-power FM transmitters, and several receivers based on recycled VCR tuner modules. Suitably entertaining in a Swedish sort of way (note the "Wife Replacer" project).
to electronics ham inductor radio ... on 03 October 2009
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| - inductor | |
| 1 | amateur |
| 1 | chip |
| 2 | coil |
| 1 | die |
| 3 | electronics |
| 1 | filter |
| 1 | ham |
| 1 | hf |
| 3 | inductor |
| 1 | lpf |
| 1 | photography |
| 2 | radio |
| 1 | reverse-engineering |
| 1 | transmitter |
tasty by Adam Sampson.