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| Customer Reviews |
4.3 out of 5 stars |
|---|---|
| Best Sellers Rank | #45,571 in Electronics (See Top 100 in Electronics) #3 in LED Segment Displays #1,193 in Computer Monitors |
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HiLetgo 2pcs MAX7219 8-Digital Segment Digital LED Display Tube for Arduino 51/AVR/STM32
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ADG –
Five stars! This 8-digit 7-segment display driven by MAX7219 works perfectly. It can be controlled by essentially any microcontroller, just follow the MAX7219 datasheet. I ordered some more.
Keith –
Just as my headline states…a little code and some soldering skills for the pins are required. You’ll need to research further code to be able to dim the display a little because it is REALLY BRIGHT.
The Butlers –
Worked great using a Raspberry Pi Pico. Only complaint possibly is that my uppercase H and some others display as lowercase, but that’s probably an issue on my code end, so I wouldn’t put too much towards it.
ChefChef –
The media could not be loaded. The displays are bright. The modules were soldered neatly into the board, with no skewing or bowing. I could mount these in a bezel without modification.Pro Tip: Look at my picture. The straight Berg headers need to be on the left side, and the bent Berg headers need to be on the right. Do not solder it like I did (twice). I can daisy chain them, but it’s going to be awfully tight.Pro Tip number 2: If you are using these with a NodeMCU, use the LedControlMS library, not the LedControl library. If a sketch references LOAD, that means CS on these modules.
j.yoders –
At first, I was unable to get the second and the sixth digits to work on one of the displays, so I challenged myself to try repairing them.For testing, I used my Arduino UNO with the LEDControl library, whose dot matrix sketch is perfect for diagnosing all MAX2719 and MAX2721 devices, and I also perused the technical documentation of both the 2719/2721 and the 3641AS, which is the seven segment digital display used in this product. Between the documents, my Arduino, and my multimeter, I was able to find out which pins were in need of more solder. 20 minutes of reflowing solder onto the pins of the surface-mounted MAX2719 chips, I was able to get the missing digits to work perfectly fine.However, I would only recommend trying these repair methods if you’re comfortable with soldering small, surface mounted components.Now that both display modules are fully working, the real fun begins. 😉
Caleb McGlothinCaleb McGlothin –
These are great! I’m building a simple control box for my laser cutter and I’ll be using these to display the flow rate of the water and the total power usage of the laser (40w max) so nothing too crazy but these are easy to use and work out of the box with the Arduino libraries for the MAX7219.I’ve already got about 15-20 loose 7-segment displays but for the price this was a no-brainer for this project, much less hand soldering and a smaller layout. Surprised they can sell at this price with Amazon shipping!
Jrox –
The alignment on one of the two displays is a little off, but that’s not a problem for me. When I plugged in VCC and Ground pins, EVERY light turned on at 100% brightness and it got really glitchy, randomly blinking and glitching with the slightest touch (or non-touch). Setting the brightness to <50% via code was the key to stabilizing the display, and it’s plenty bright for my purposes. It works really well and I’m very happy.
Brad P. –
Works well with the Arduino platform.
Amazon Customer –
Very nice displays. They are pretty to look at and easy to hook up. They can get very bright with the correct settings. I dinged off one star because the 4 segment displays were slightly crooked on both. I’m pretty good with a soldering iron so it wasn’t a problem for me. I will probably get more for other projects.Update: I bought more. The displays were straight on both so I changed to 5 stars.
Bri GuyBri Guy –
I purchased these displays to gain experience programming a MAX7219 display on my STM32 microcontroller. I’m a retired software engineer with a degree in Electrical Engineering so I enjoy tinkering in my spare time.The bottom line is that these displays look and work very well. The digits are red in color and I generally operate them on minimal brightness. I’ve had no issues with them whatsoever, and I highly recommend them!The photo shows the display operating, displaying the temperature value read from my TMP102 sensor. The digits are more red in color than the photo suggests (like the reflection).Other reviewers mentioned issues with their display chip alignment, but the ones I purchased were very well aligned.