SN74LS245 SMD Octal Bus Transceiver IC 24V DC Transparent Relay It has two connector pin

It has two connector pin with 5mm pitch through hole mounting

5k ohm (1501) Brand Resistor Chip size 0805 Tolerance 1% Power 1/8W Temperature Range -55°C to +125°C Mounting Type Surface mount No

you can make hidden in the walls

Switch Mode Power Supply

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SN74LS245 SMD Octal Bus Transceiver IC 24V DC Transparent Relay It has two connector pinSN74LS245 SMD Octal Bus Transceiver IC is an 8 bit bidirectional bus transceiver designed for asynchronous two way communication between data buses. It features three state outputs, direction control, and enable functions, making it ideal for data buffering, bus driving, and interfacing applications in microprocessor based systems. The SMD package allows easy integration into compact PCB designs used in industrial, embedded, and digital electronics