Pages: 1 2 3 [4]   Go Down
Author Topic: help with : shiftregister + fading  (Read 3285 times)
0 Members and 1 Guest are viewing this topic.
Manchester (England England)
Offline Offline
Brattain Member
Karma: 636
Posts: 34574
Solder is electric glue
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

That look fine if a bit over complex.
However the LEDs will be on when not addressed by the 138, so all you will do is to be able to turn one off.
You need to have the transistor acting as a top switch, that means they all have to be PNP transistors with the emitters to +5 and the collectors going to the LED / resistor to ground.
And attach the PWM signal to one of the enable lines of the 138 like you did before.
« Last Edit: June 17, 2011, 12:21:13 am by Grumpy_Mike » Logged

Offline Offline
Jr. Member
Karma: 0
Posts: 88
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Now it is working and thanks alot again Mike .. that was a great help !

this my finished project :

Pages: 1 2 3 [4]   Go Up
Jump to: