bidbid21
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Recent activity by bidbid21-
Hi,After many search, I think that the problem is caused by electrostatic discharge.It is possible that connect iron display frame to the ground?Thanks
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The display is assembly on electronic card that is RFID Reader. This reader is powered by ethernet PoE. The supply of display is regulared by LD50 regulator + capacitor and zener diode (for protect...
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Actually, the voltage of display is 5v(by 7805 regulator) and contrast 0.9v (by the tension divider bridge between 5v and ground)I saw that the stikers on the chip has browned.The display was use i...