what is the principle for learning about the codes, especially those arrays as of this review, Led Dot Matrix 64x16 and also these RG Led Matrix?
HelloThank's to Kaziewip for your program, it work perfectly !!But i have a probleme with my LED Matrix.My counter work well, but i have a lot of blinking artefact on the screen:You know why ?
but it is not working...it only got worse.
HiThank you petabyte and kaziewip for your interesting libraries. I have my led 64x16 dot matrix from aliexpress.comhttp://www.aliexpress.com/item/Indoor-F3-75-P4-75-Single-Red-color-LED-dot-matrix-module-304-76mm-64-16/1721794648.htmlBased on petabyte's code I've created an timer/interrupt based version, which runs the matrix in background. In main loop I download data from internet with an ethernetshield an update it on the matrix in fixed time intervals. Beside the matrix display mechanisme, which could in my opinion be improved, I'm not shure, how the current-limiting could be donne right:1. I search more data(sheets) of the matrix it selfe. (led peak current, and for how long the peak max shoud last)2. The colum drivers (shift register 74HC595) seem not to be the right thing for their job: max 35mA current per output, total max 70mA current output for the hole IC, 0.5W max Power disipationIn multiplexing mode, there are much higher peak currents.http://www.nxp.com/documents/data_sheet/74HC_HCT595.pdf3. The row drivers look much more stronger: p-chanel mosfet FDS4953: 5A contiuos current, 20A peak -> each row is only on for 1/16 time.https://www.fairchildsemi.com/ds/FD/FDS4953.pdf4. according to this website, i bought the matrix, it's driven 1/16 constant current. But how should the current be constant when in each row a different count of led's are shining?5. if one led consumts 10 to 20mA in constant current, it could be peak 100 to 200mA (16x multiplex) a normal led accepts max 10x times the constant current as peak.The whole matrix is on: 64x 100mA = 6.4A per row, always only one row on. -> 8 shift registers for the whole row: 6.4A/8 = 0.8A continous through ONE shift register. In my opinion something doesnt work right here. Pleas correct me, if me suggestions are wrong.conclusen: 1. the shift registers are too weak.2. the current should be limited individually per row, according to the count of led's on in this row.