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Amazon.com: Gikfun 9v Battery Holder with ON/Off Switch for Arduino (Pack of 2PCS) EK2107x2 : Electronics
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Basic switch and input_pullup blew my pins? - General Electronics - Arduino Forum
Amazon.com: Gikfun 9v Battery Holder with ON/Off Switch for Arduino (Pack of 2PCS) EK2107x2 : Electronics
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Amazon.com: Gikfun 12mm Waterproof Push Button Momentary On Off Switch 5 Colors DIY Kit for Arduino (Pack of 10pcs) EK1925 : Industrial & Scientific
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Amazon.com: AC100V-250V 30A High Power 2-Channel Relay High Current DC5V High-Low Level Trigger Switch Module for Arduino : Walfront: Electronics
