LED´s still lighting a bit, if they are switched to LOW

Other Hardware LEDs and Multiplexing
1

So i have 6 LED, 3 on the right 3 on the left,
2 of the Anode (both of the left led/ middle ones / right ones) are connected to each other,
the right part of the LED´s or connected to a -Pol and the left side to a different -Pol with a 220Ohm Resistor.

Then i have 2x Transistors, the Bases are connected to an Arduino Pin, the Emitter to a 3rd -Pol with a 1kOhm Reisitor and each Collector to one of the -Pols from the LED´s.

I use that to Control each LED with a small Numbers of Pins.

Now the Problem is that the LED´s which are switched to LOW are still lighting a bit.

2

We need a schematic to read if we are to help you with this. Hand-drawn is ok. But please include details of the LEDs, transistors and power supply.

3

Maybe i have the solution.

But with a Transistor you can "control" a -Pol.

Now i have the
Emitter connected to the Arduino Pin
Base is "creating" a -Pol for the LEDs
Colector is connected with a 1k Ohm Resistor the the default -Pol.

Would this be correct ?

4

What is "a -Pol"?

Post a circuit diagram, don't try to describe it in words.

Steve

5

poste einen Schaltplan hier ins Forum (nicht auf irgendwelche Bildhoster) und mache ein ECHT-Bild deines Aufbaus.

6

Yeah, that too! :astonished:

7

i fixed it... it was a misplaced Resistor. But for the futur, which program do you use for a schematic ?

8

RechScheibFeler:
For the future, which program do you use for a schematic ?

Eagle and KiCad seem to be the 2 common ones for hobby use. I use KiCad

Pencil, paper and camera also work reasonably well, a ruler makes for neater schematics.

9

Honestly, we are happy with a piece of paper and a simple drawing for things like buttons and LEDs