4 Digits, 7 Segment LED Display Module, 74HC595
$2.80
- Description
- Additional information
- Reviews (2)
- Enquiry2
Description
There is four 7 segment display inside of this module, with a PCB control back board.
See the pictures about how it looks like.
Features:
- Standard 5135 enclosure, nice look, easy to install on devices. The mounting hole dimension should 72*39 mm, and you need leave two extra cutout place for the “ear” on the side of the panel.
- All these four seven segment display controls by 4 pieces 74HC595 ICs where are on the back PCB board. All the segment display are current limited.
- Static driven, when the number is not changing, MCU don’t need to refresh it, save MCU resources.
- Simple interface: +5V, -5V, data, data shift CLK, latch LCK, only need 3 wires to MCU, save resources.
- Can connect in series, e.g. four displays, can connect one by one, and only connect the three wires of the first display to MCU is enough.
- VCC, GND, SDI – DATA in, SCK|CLK – clock, RCK|LCK latch lock
- If you don’t need enclosure, there are four screw holes, easy to install too.
- Can display the dot symbol.
- Needs 300mA to display 8888, because the high brightness.
Additional information
| Weight | 0.05 kg |
|---|
chuck808 (verified owner) –
The only reason I am giving this 1 star is because I can’t give it 0. This product is a complete rip-off of the original and does not work with the provided demonstration links. It displays the characters in reverse order. Look for the original and avoid this product.
chuck808 (verified owner) –
I initially gave this product a 1 star rating because it didn’t look like the one in the image nor did it work the same. After contacting the company I found out that there are 2 versions, one is the Green PCB (shown in product image), and the other is a Red PCB (the one I received). They are the same product, though with one slight difference, the order the digits display. The Green PCB displays the digits in reverse order 4, 3, 2, 1 and the red PCB displays as digit 1, 2, 3, 4 –
Green PCB
digitalWrite(latchPin, LOW);
shiftOut(dataPin, clockPin, LSBFIRST, LED_SEG_TAB[d]);
shiftOut(dataPin, clockPin, LSBFIRST, LED_SEG_TAB[c]);
shiftOut(dataPin, clockPin, LSBFIRST, LED_SEG_TAB[b]);
shiftOut(dataPin, clockPin, LSBFIRST, LED_SEG_TAB[a]);
digitalWrite(latchPin, HIGH);
Red PCB
digitalWrite(latchPin, LOW);
shiftOut(dataPin, clockPin, LSBFIRST, LED_SEG_TAB[a]);
shiftOut(dataPin, clockPin, LSBFIRST, LED_SEG_TAB[b]);
shiftOut(dataPin, clockPin, LSBFIRST, LED_SEG_TAB[c]);
shiftOut(dataPin, clockPin, LSBFIRST, LED_SEG_TAB[d]);
digitalWrite(latchPin, HIGH);
The module is an excellent display for lots of Arduino projects, it is cheap, clear to read and has an enclosure. Would highly recommend!