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Hi Jones Electronic. I am trying to make this module for a project of mine. The problem is Im unable to find the components listed in the parts list. Additionally, the parts list does not match the components used in the circuit diagram. For instance, 10 74HC4510 ICs are used in the circuit whereas the parts list mentions just 5. 74HC4543 is not used in the circuit. I have not been able to obtain 4510 and BD 175 as they are not available anywhere around where I work or even online. Can you please clarify this issue and suggest alternate ICs and part numbers? My email id is firstname.lastname@example.org. I need to finish this urgently and I would be grateful if you could reply promptly. I eagerly await your reply.