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    Arduino 4-channel relay shield module with optocoupler isolation for controlling high-voltage devices.
    Arduino 4-Channel Relay Shield Module
    1 X  400 =  400
    Starter Arduino kit, beginner-friendly set with Arduino board, basic sensors, and components for learning electronics and programming.
    Arduino Starter Kit with Component Box
    1 X  4,750 =  4,750
    NE555 timer IC in DIP package, versatile integrated circuit for generating precise time delays, pulses, and oscillations in electronic circuits.
    555 Timer IC NE555 (DIP)
    1 X  15 =  15
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