LED & KEY module - 'strobe' question

Other Hardware LEDs and Multiplexing
1

Hi all, I bought a bunch of "LED&KEY" modules to use with arduino UNO.

They look like this....

LEDKEY_1.jpg

And one website is showing people how to use it... at ...click here....

However, the website is saying that the "strobe pin" is an 'output'.

Could anybody explain what the strobe pin for this particular device does?

The website is saying "The strobe pin is used when sending data to the board – you set the strobe pin to LOW before you start sending data – one or more bytes – and then set the strobe pin back to HIGH." ...... but it just appears that the information is unclear. I'm thinking that..... if the website is teaching us that the strobe pin is an 'output', then why is it telling everybody to 'set' the pin low and high? I'm thinking that only 'input' pins are meant to be set low or high.

Anyway, I don't understand what the 'strobe' pin does in this LED&KEY module. Could someone please shed some nice light on this pin?

Thanks all!

2

On the TM1638 IC, STB is an input (Chip Select pin). In the Arduino code, STB is an output so it can enable/disable communication.

3

dlloyd:
On the TM1638 IC, STB is an input (Chip Select pin). In the Arduino code, STB is an output so it can enable/disable communication.

Thanks dlloyd! Greatly appreciated. It's all clear now. Thanks again!