Finally got around to testing the 1802 Membership Card I built a while back. Seems to be working quite well. At least, the ‘Q’ light blinks when told.
@N2UX may I ask what this is and does besides blink?
@KI5FGS It’s basically a modern day miniature version of the Cosmac ELF microcomputer that was introduced in Popular Electronics magazine in 1976. Wikipedia has info here: https://en.wikipedia.org/wiki/COSMAC_ELF . It can be programmed to do all kinds of things.
COSMAC ELF - Wikipedia

@N2UX aww, thank you! I appreciate the information and the article link!