74HC595 - led won't light up
hi,
i played around 74hc595 today , followed playground tutorial regarding piece of hardware.
the problem non of leds willing wo light up. tripple checked wireup , im sure not problem.
i can measure voltage on output pins of 74hc595. here foto of setup:
after hours of searching loaded blink sketch ( pin13 high/low ) , wired led 220ohm resistor it.
the funny thing led not willing light up. check anode in right direction.
so tried more basic:
i wired resistor , led 5v output of arduino , wired cathode ground pin.
nothing happend somehow fried arduino ?
what should next steps ?
thank
i played around 74hc595 today , followed playground tutorial regarding piece of hardware.
the problem non of leds willing wo light up. tripple checked wireup , im sure not problem.
i can measure voltage on output pins of 74hc595. here foto of setup:
after hours of searching loaded blink sketch ( pin13 high/low ) , wired led 220ohm resistor it.
the funny thing led not willing light up. check anode in right direction.
so tried more basic:
i wired resistor , led 5v output of arduino , wired cathode ground pin.
nothing happend somehow fried arduino ?
what should next steps ?
thank
so after playing around got single led blink
the thing remember row on breadboard connected. when inserted led anode + cathode same row basicly shortcuted way fpr current - avoiding led :/
sorry, im dumb
*close please
the thing remember row on breadboard connected. when inserted led anode + cathode same row basicly shortcuted way fpr current - avoiding led :/
sorry, im dumb
*close please
Arduino Forum > Using Arduino > LEDs and Multiplexing > 74HC595 - led won't light up
arduino
Comments
Post a Comment