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circuit review

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fkuk

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**broken link removed**

what im trying to do is make a wall of rgb leds and have them change colour and pulse from side to side (top to bottom in the picture above)

so i made this circuit.

the plan is to have 3 decade counters each having a clock at different frequencies this would give the effect of changing colour
each output of the decade counter is connected to the two transistor with a capacitor and resistor this adds a fade to the led as it turns off
this is then connected to one segment of 7 rgb leds

the circuit only shows 2 rows of leds but the real one will have 7 leds by 7 leds

what i want to know is


---what decade counter to use the one i have used on this site Circuit Simulator Applet uses a decade counter with 10 outputs and the one in the diagram above has 7 but i think it converts it into 7 segment type display
the circuit import code is :
$ 1 5.0E-6 11.086722712598126 1 5.0 50
163 208 672 304 672 0 10 0.0 0.0 0.0 0.0 0.0 0.0 5.0 0.0 0.0 0.0
R 272 64 272 16 0 0 40.0 5.0 0.0 0.0 0.5
r 272 160 320 160 0 100.0
c 272 160 272 208 0 1.0E-5 0.6105397283480647
t 320 160 352 160 0 1 -2.311863355252724 0.6070610862954182 100.0
w 272 208 352 208 0
w 352 208 352 176 0
162 352 112 352 144 1 2.1024259 1.0 0.0 0.0
w 352 64 272 64 0
g 272 208 272 288 0
w 208 64 192 64 0
w 192 64 192 736 0
w 192 736 528 736 0
R 208 704 144 704 1 2 412.0 2.5 2.5 0.0 0.5
w 240 640 240 208 0
w 240 208 224 208 0
w 1200 96 1200 48 0
w 1200 192 1200 160 0
r 432 160 480 160 0 100.0
c 432 160 432 208 0 1.0E-5 0.6205148471370363
t 480 160 512 160 0 1 -2.1390338318538524 0.615616661484181 100.0
w 432 208 512 208 0
w 512 208 512 176 0
162 512 112 512 144 1 2.1024259 1.0 0.0 0.0
g 432 208 432 288 0
w 432 64 512 64 0
w 432 64 352 64 0
w 384 144 384 320 0
w 384 320 272 320 0
w 272 320 272 640 0
r 576 160 624 160 0 100.0
c 576 160 576 208 0 1.0E-5 0.6355665255243144
t 624 160 656 160 0 1 -1.7930520499456795 0.6276425080428769 100.0
w 576 208 656 208 0
w 656 208 656 176 0
162 656 112 656 144 1 2.1024259 1.0 0.0 0.0
g 576 208 576 288 0
w 512 64 576 64 0
w 576 64 656 64 0
w 528 144 528 336 0
w 528 336 304 336 0
w 304 336 304 640 0
t 224 144 272 144 0 1 -5.0 -0.6105397283480647 100.0
w 272 128 272 64 0
t 384 144 432 144 0 1 -5.0 -0.6205148471370363 100.0
t 528 144 576 144 0 1 -5.0 -0.6355665255243144 100.0
w 432 128 432 64 0
w 576 128 576 64 0
w 224 208 224 144 0
r 352 112 352 64 0 100.0
r 512 112 512 64 0 100.0
r 656 112 656 64 0 100.0
w 656 208 688 208 0
w 688 64 656 64 0
w 208 64 272 64 0
o 1 64 0 33 4.374501449566024 22.397447421778043 0 -1

-- i also want to know the effeciency of the circuit especially the transistor bit of it
can you reduce the transistor section but still have 7 leds powered off it and have it still fade?

-- in the circuit simulation app it says as the leds turn on the current drawn is 14A but this is a spike would this work fine with a ac adapter whos output is 12V at 1.5A max

thanks
any other constructive advice is welcome
 
**broken link removed**

second try to add picture

its not working just use the link above^^^^^^^^^^^^^^^^^^^^^^
 
Last edited:
Why don't you attach your schematics here instead of at those other weird websites that don't work half the time?
It looks like you tried to attach the last picture here but something is wrong, maybe it is too small.

Your circuit will not fade because the output transistors are switches. They must be emitter-followers to make the LEDs fade slowly.
 
I tried the aplet.

Here's a picture of the schematic.

The simulator says it work and the circuit makes sense to me.
 

Attachments

  • LED Fader j aplet sim1.PNG
    LED Fader j aplet sim1.PNG
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