Second I2C address not responding

[Amoque]

Haha! A question I can answer for you! The part number is PCF8574A - the "A" differing only by its upper address nibble, 0111xxx. If I include the write bit (I do because no read is ever done from the completed modules), the address range is $70 - $7F. With both the '74 and '74A, I can put 16 modules on a bus and make my own "Wheel of Fortune"! Did I not say I bought quite a number of these?

A picture so that you can envy my good fortune...



The small item is a standard dot-matrix LED for comparison.

--All the best,
Amoque

[Art]

I was hoping they were matrix displays
They do look like a good way to make a project flexible.
I wouldn't want to be making the front panel for them though!