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DMD voltage issue with 2.49v of Pin2DMD

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Hi !

With 5V to VCC and DIR (pin1 and 20)
And
GND to Ground and /OE (pin10 and Pin19) 

B1 to B8 is input & A1 to A8 is output
Or

A1 to A8 is input & B1 to B8 is output  ?
 

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Hi !
Strange...I make a quick  electronic assembly with 2 74HCT245 as you say.
All Signals passed through (except pin 4 and 16, which are directly connect because they'r ground).

It's work..but... it's missing 1 line out of 2...
Strange....

 

01.jpg

02.jpg

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Yeah...Strange, always low on A but input Not...
A build a new electronic assembly but with 2 x 74ls245 (so, not HCT)
This don't correct the problem but, if I Add a voltage regulator on 5V input (to have so, less 5V to powerOn the 2 DMD) it work.
So the couple of 2x74LS245 + voltage regulator seems to be work for me.
I say 'seems' because I tested on played on my real Pinball but only 10mn (Too cold on my shed)

;)

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