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NE555 Adjustable Duty Cycle Pulse Frequency Square Wave Signal Generator Module

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Variable Frequency SMD 555 Astable Electronics Kit

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Envistia 12V (8-23V) In To 3.3V Out 3A 10W DC-DC Waterproof Step-down Buck Converter Module

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RS232 to RS422/RS485 Optically Isolated Serial Adapter / Converter CS-428/9AT-ISO2

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48V (30-60V) In To 24V 10A 240W Industrial DC-DC Waterproof Step Down Converter Power Supply Module EM-48S2410Z

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5x7cm DIY PCB Prototyping Perf Circuit Boards Breadboards - 10 Piece Set