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#quicktip #buildinpublic #pcb-design #stm32 #kicad #hardwarefail #freertos #python

Usman AR @usmanar.eng • 3 weeks ago

Lab Notes & Hardware

Panduan Mendesain 4-Layer Controlled Impedance PCB di KiCAD v8

Bagi yang terbiasa mendesain 2-layer PCB untuk microcontroller sederhana, melompat ke 4-layer stackup (Signal - GND - PWR - Signal) adalah lompatan besar dalam stabilitas EMI dan integritas sinyal.Beberapa aturan praktis yang wajib diperhatikan di KiCAD v8:Continuous Ground Plane: Jangan pernah memotong plane ground di...

#kicad #pcb-design #quicktip

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Usman AR @usmanar.eng • 3 weeks ago

Lab Notes & Hardware

Oscilloscope vs Logic Analyzer: Menemukan Spike Misterius di SPI Bus

Hari ini troubleshooting kendala komunikasi SPI antara STM32F4 dan chip flash external W25Q128. Data selalu korup di frekuensi di atas 10MHz.Awalnya mengira clock divider di kode HAL yang bermasalah. Pas dicek pakai logic analyzer, paket data kelihatan terkirim utuh tapi bit CRC reject. Pas ditusuk...

#hardwarefail #pcb-design #quicktip #stm32

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usmanar.eng

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Usman AR

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🔗 usmanar.com • Jakarta, Indonesia

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