3PCS 0.36 inch LED Display Module TM1637 7 Segment 4 Bits with Clock Display Common Anode Red Digital Tube Board for Arduino

The TM1637 is a standard part supported by Arduino and other embedded development platforms, and is I2C bus which makes it ideal for small embedded CPU boards with limited I/O. I paired mine with an ESP01 for testing, about as minimal a board as you can get, and it worked great. However, these days I find simple 7-segment displays far too limiting. I frequently use OLED 12864 boards that are also I2C, smaller in board footprint, and 128x64 pixel so they are far more flexible, and at only a little more cost. With the Arduino libraries, they are just as easy to program, too. The 7-segment displays are a little brighter, however, so if your goal is a simple timer or clock display you might be better off with the TM1637. Anyway, these parts from Ferwooh are reasonably well made, bright and clear, and have good mounting screw holes. I’m not as pleased that the header pins are side mounted in retrospect; it makes it harder to design an enclosure than a rear facing header would have been. That is pretty normal for the part type though. I will note that the product picture shows a screen printed blue PCB with labels that look like the equivalent Grove part from Seeed Studio, but what shipped was blank green PCBs.

These 7 segment 4 digit displays from Ferwooh are easy to use and work well with our Arduino projects. The bundle includes three TM1637 screens.We use the TM1637Display.h library which meets all of our needs. At such a reasonable price, I would definitely recommend them.