spell fixing
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@ -11,7 +11,7 @@ Use a USB-Serial Converter like the FT232RL for activating a buzzer. Simple and
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* works safe on system with only one `/dev/ttyUSB` device
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* no other task can use the FTDI device for other things
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## Handware:
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## Hardware:
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1. FT232RL Breakout board ~1,5€
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2. NPN Transistor like 2N2222A ~0,0€
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3. Active Buzzer 5V ~0,25€
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