added scope screenshot for button
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@@ -9,7 +9,7 @@ Hardware
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- [Raspberry Pi Zero W](https://hackerboards.com/board/raspberry-pi-foundation-raspberry-pi-zero-w-wireless)
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- A button connected to the Raspberry pi GPIO as shown in the schema to debounce noisy contacts
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- USB speaker with a microphone e.g. [Jabra Speak 410](https://www.jabra.com/_/media/Jabra_VXi_Product-Documentation/Jabra-SPEAK-410-Series/technical-specifications/RevB/Jabra-Speak-410-Techsheet-A4-290420-Web.pdf)
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- microSD card 8GB
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