Review on π Comimark 3-Piece 4-Bit TM1637 Digital Tube LED Clock Display Module for Arduino Due UNO 2560 R3 by Samuel Nguyen
Everything seemed to work fine
Nothing good or bad to say. They display the clock but are not clocks, they are controlled by Arduino to be what you want them to be. Too bad there's no decimal (just a colon), but it's no big deal if you put a separate LED for the decimal (and it's not lit, of course).
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