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Assalam o alikum !!!Yes, LED's anode and cathode legs are soldered correctly.yes, pull-down resistor of 10k connected between the LOAD and GND(i could not find 12k in my lab)Yes connections are same as you told sir. i was thinking that may be my leds consume more current than yours and 7219 is unable to sink this much current ??? or may be 5v from laptop port is not juiceful enough to operate them ?
Sir i have made this my matrix using circuit diagram in step2.My matrix is not showing anything even test program is not running.i used red leds (5mm) to make my own 8x8 matrix.Are there any current problems ? i have checked this code on Ready made 7219-Matrix-Module ,it works but in flipped manner means . i want to make my own matix as shown in step2. plz any suggestions ?
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Hi,,,,,,i have a doubt !!!Leds are connected in parallel then how can we connect them with 9v battery ??
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