Why You Should Use a Flyback Diode in a Relay to Prevent Electrical Noise | PCB Design Blog | Altium
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transistors - Does a BJT controlled relay need protection diodes? - Electrical Engineering Stack Exchange
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Amazon.com: STANDARD MOTOR PRODUCTS MC-RLY6 Relay Micro W/ Diode for Harley-Davidson OEM# 31511-01A : Automotive
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