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SainSmart 4-Channel Relay Module
5V 4‑channel relay board, each channel draws 15‑20 mA. Supports high‑current relays (AC 250 V / 10 A, DC 30 V / 10 A). Standard interface works with Arduino, 8051, AVR, PIC, DSP, ARM, MSP431, TTL. LED indicators show output status.
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