74HC595 led at medium brigth? No PWM [Solved] wrong size resistor duhh

hi... today start mess the  74hc595 need make 2 huge 7 segment displays but, before, start learn basics of it.

i have sketck , wiring diagram nick gammon;

http://www.gammon.com.au/forum/?id=11518

i make couple of misses when connect ic... read again schem , seems working, weird problem.

the diagram is;



the sketch is;

code: [select]


/*
en este programa comenzaremos probar el shift register,
para poder usarlo cuando sea conveniente.

*/


#include "spi.h"
const byte latch = 10;




byte c = 0; 

void setup() {
  spi.begin ();
}


void loop() {
  c++;
  digitalwrite (latch, low);
  spi.transfer (c);
  digitalwrite (latch, high);
  delay (1000);

}



so, there no pwm output, on , off...

but in moments leds, remain small current flowing...







my question is... whath can make ic works properly?



i have 0.1uf pin 16 gnd schem.
i have 10k on pin 10 gnd, schem
i have conected 16 , 10 547 5vcc
and   8 , 13 547 gnd

its seems im missign here.


i hope 1 here can point me on right direction.

thanks in advance.

-alex.

quote

its seems im missign here.

you missing posting adequate photograph of setup. can see wires circuit , identify them schematic?
no?
then nether can else.
the schematic not show leds , current limiting resistors either.

one thing can spot wires on 0.1uf capacitors way long, need short possible. not enough sole cause of problems not helping. 

Arduino Forum > Using Arduino > LEDs and Multiplexing > 74HC595 led at medium brigth? No PWM [Solved] wrong size resistor duhh

arduino