Wcn3-0080sr-a13 display 7 segments 3 digits

[gcborges]

HI,

I did buy this display WCN3-0080SR-A13. Specs in the link below. I'm trying to use with Arduino Uno, but.

Display 7 Segmentos 3 Dígitos 0,80 Polegadas Vermelho Anodo - R$ 19,50

My problems are:

1. What is the logic to control each digit? The logic of other displays doesn't match.
2. I need to use transistors with this display?

best regards
Guilherme

[LarryD]

This is a common anode display.

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One way to connect:

ABCDEFGDp connected to resistors to 8 output pins.

Three P channel MOSFETs to +5V, control by three (segment select) output pins.

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Select the 7 segments as needed, turn on the segment MOSFET.

[Paul_B]

You can use it directly connected to the UNO including the anodes. The eight series segment resistors must be at least 1k.

@LarryD

Select the 7 segments as needed, turn on the segment MOSFET.

Then wait a reasonable amount of time (about 3 ms) while doing other essential things in the code.
Turn off the segment FET
Select the 7 segments as needed for the next digit.
Turn on that next digit FET
Wait ... etc.