Electronics - circuit relay type answer

A relay-style five electronic Responder Responder group circuit. The circuit has a self-locking, sound and light display, monitor time and other functions. Large ones may be in
Electronics - circuit relay type answer - schematic

creased. Drawing, buttons SBe is monitoring time button by the moderator master. Press this button, audio circuit voice, told Time has come to stop writing ; button SB7 role is when the question answered, or because of the time to stop to answer, the host press the button briefly, the circuit recovery.

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