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Giants

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  1. DMD voltage issue with 2.49v of Pin2DMD

    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)
  2. DMD voltage issue with 2.49v of Pin2DMD

    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....
  3. DMD voltage issue with 2.49v of Pin2DMD

    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 ?
  4. DMD voltage issue with 2.49v of Pin2DMD

    Hi ! If I MOD, I Add 2 x 74LS245 before HUB75 Input as you say, it will be enough ? I have a older Amiga 1200 PCB that have a 74LS245 (but bot 74HCT245)
  5. DMD voltage issue with 2.49v of Pin2DMD

    Mp send to UncleSash Question but, I'have the 3.1Board version Maybe is they are a way to 'mod' my 3.1version with a 74LS245 or 74HCT245, make some solder and modification do not scare me Are they link to v3.1 and v2.0 schématic available on the net ? If I juste cut somme trace and Add a 74HCT245 with some wire... no problem. Second option is changing directly on DMD board but I can't find package information (so, dimension) of my SUM 74HC245T D1409AFP81
  6. DMD voltage issue with 2.49v of Pin2DMD

    Hi ! So... communication with the seller is impossible... he does not care about you. So, if you want to buy it on alyexpress, avoid the seller : Ever Shine Digital Advertising Store (https://evershine.fr.aliexpress.com/store/103659) Just an advice, don't buy with them. Now, I need to return to the original DMD 'orange' or find, in france, somebdoy wan and want to change the 74ls chipset...
  7. DMD voltage issue with 2.49v of Pin2DMD

    Hi ! After a lot a tests, Only 3.3V work a little (bugs and bug and bug... all the time, color bug) but it's realy random situation, a lot of color pixel issue when playing. Communication whith the seller is... difficult.
  8. DMD voltage issue with 2.49v of Pin2DMD

    Hi ! After a lot a tests, Only 3.3V work but it's realy random situation, a lot of color pixel issue when playing. Communication whith the seller is... difficult.
  9. DMD voltage issue with 2.49v of Pin2DMD

    Hi ! After a lot a tests, Only 3.3V work but it's realy random situation, a lot of color pixel issue when playing. Communication whith the seller is... difficult.
  10. DMD voltage issue with 2.49v of Pin2DMD

    ?? The seller tell me old me the opposite I have more confidence in you, It's certain. I will see with the seller if he can have me recent dmd 1/16, but he's not technical Tell him about 74HC245T, 74HCT245 ...it's like...recite a poem to a cow. It's coool but... it does not help much. Ok, Thks
  11. DMD voltage issue with 2.49v of Pin2DMD

    Hi Just a last question. We are agree a 1/32 DMD don't work with M14STM32 F4 and last version of pin2dmd (2.49) !
  12. DMD voltage issue with 2.49v of Pin2DMD

    Yes, if I remember the HCT chip are used because they are faster in I/O But, I don't have the good H/W to desoldering and re- soldering this. I can try but... not sure about the resultat and especially, I don't have a 74HCT245 in cms. I have a lot in normal socket ;), but not in CMS. I can of course order this, but it's very difficult if I don't have exactly a good a soldering station with his tools for cms. But, finaly, If it's work good with 3.3V... so...I can use 3.3V of my atx power suply.
  13. DMD voltage issue with 2.49v of Pin2DMD

    Hi Yes or change the 74HC245T by 74HC245 But notre easy if we don't have hardware to do this. Thks for your reply, i will try some h/w configuration like you Say. See you
  14. DMD voltage issue with 2.49v of Pin2DMD

    PCB : P2.5(2020)-16S-V1.0 UR1, UG1, UB1, UR2, UG2, UB2,UR3,UG3,UR4,UG4,UB4, UR5, UG5, UB5, UR6, UG6, UB6,UR7,UG7,UR8,UG8,UB8 : CHIPONE ICN2026DP C CF 1J15.1 U1, U2, U3 : SUM 74HC245T D1409AFP81 a couple of 16 : 4953 4K2501 x2 (below C29) : DP74HC138 4J2101 cx3, cx4 : 220ùF 10V a lot of capacitor cmd : C1->C29 (not measured ) a lot of resistor cmd : mark 29B (not measured but normaly 1.96Kohm) I thinks, it's all
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