WWZMDiB 4 Digit 7 Segment Digital Tube LED Display Board for Arduino (5 Pcs)

Works as expected.

The media could not be loaded. I got a pack of five for just eight dollars, which is a great price. These things can get really bright, so I use them at the minimum brightness.As others have mentioned, there is one flaw: the headers are soldered at an odd 45 degree angle on the face side, so they will most likely require re-soldering if you want to panel mount them.

I previously posted a negative review of this product. I would revise that if I could find it. I could not get these to work when I got them. After buying a different brand, I found that I could not make them work either. The problem, it turns out, was that I had not been able to find a suitable sketch for Arduino. I tried many, and none of them worked. Further research led me to a workable sketch and I retested these and they did work. The only issue I found was that the soldering of the pins is a bit sloppy, but it did not affect the usability.

Works like a charm with my Raspberry Pi Zero V1.3 and Pi Zero W 2 boards. All I needed to do was download tm1637.py from Github (I'm using the depklyon version of tm1637, search for it), hook the power (VCC and GND) pins to 3v3 and ground pins (17 and 20 in my case) and the CLK and DIO pins to GPIO pins (GPIO23 (pin 16) and GPIO24 (pin 18)).For the python code add these lines in the appropriate places:import tm1637#declare variablesCLK = 23DIO = 24tm = tm1637.TM1637(clk=CLK, dio=DIO)#adjust brightnesstm.brightness(0)#then call tm.show(x) to print a string to the 7 segment displaytm.show(str(x))Then let the learning and fun begin!

Not much to say but they are round-of-the-mill TM1637 4-digit 7-segment display. They use their own protocol so don't mistake them for I2C and there's actually you can do with them then you might realize in terms of animations thanks to the IC behind the segments.

Three were dead on arrival. The other two died within minutes of each other.

I was not clear on what the measurements meant in the product description. These were smaller than what I ultimately needed, but they work well and are easy to use. The 0.36" measurement is the actual height of each digit on the display.I used these with an Arduino and an open-source library with no issue.

I used them in a few projects and they worked as intended.Id definitely buy them again.