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Topic: Weird issues at controlling leds (Read 849 times) previous topic - next topic

anonymousse37


What i was asking is how i get the right value in Ohm for the resistance and Farads for the capacitor according to my setup ?

PaulRB

#16
May 16, 2017, 10:59 pm Last Edit: May 16, 2017, 11:01 pm by PaulRB
The exact values are not critical. For the resistor, perhaps 220R or 330R. Anything from 100R to 1K should be fine. For the cap, because you have 63 leds, I would use at least 470uF, preferably 1000uF.

anonymousse37

OK thank you mate. Gonna buy the resistance and capacitor tomorrow and sould be delivered tomorrow aswell for the breadboard. Hope it gonna fix it.

anonymousse37

Is the resistance only required for the DI line cuz on WS2801 there is a DI line too ?

PaulRB

Please re-phrase your question.

Only one resistor is needed...

Grumpy_Mike

#20
May 17, 2017, 10:43 pm Last Edit: May 17, 2017, 10:44 pm by Grumpy_Mike
The WS2801 has two inputs, clock and data so yes put a resistor on each.

Can you describe what power supply you have running this?


anonymousse37

Yes it was late but you got it i meant DI and CK.
Got the 2 resistors 330 ohm and the capacitor 1000uF.
Trying to figure out how the god damn breadbard is working.
I'll show you what i did before trying to light the whole thing up.

anonymousse37

Here we are.
Haven't connected the teensy GND to the PSU yet, but will.
I've heard that BBoard might not support heavy Amperage, so i'm not sure if 3A is too much for the BB.



What do you think ?

Grumpy_Mike

Quote
so i'm not sure if 3A is too much for the BB.
Yes. As a rule of thumb you are pushing it to get 1A in a solderless bread board.

anonymousse37

Ok so what are my options to properly integrate the capacitor ?
Can i just solder capacitor's cathode/+5 PSU and anode/PSU GND to a wire ?

Sorry got no clue, i'm learning from 0 so consider all my gratitudes =)

Grumpy_Mike

Quote
Can i just solder capacitor's cathode/+5 PSU and anode/PSU GND to a wire ?
You could but you would be better soldering it across the power connectors of the strip.

By the way capacitors do not have anodes and cathodes but just + and - terminals.

anonymousse37

Oh ok so to make sure i did understand what you said, i can just plug the capacitor into the PSU's coaxial connector with the wires from the ledstrip ?

anonymousse37

#28
May 18, 2017, 10:04 pm Last Edit: May 18, 2017, 10:53 pm by anonymousse37
Like this if thats what u meant ( just plugged in not soldered )


PaulRB

#29
May 19, 2017, 12:19 am Last Edit: May 19, 2017, 12:25 am by PaulRB
Normally red wire is + and black wire is -. The cap has - symbols printed on a white strip on one side. Electrolytic capacitors can explode if you connect them the wrong way.

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