Problems dimming lower than 7%

[Gunther]

I´m not sure which of the SteveLEDs board you try to connect. I suggest it´s the http://www.stevesleds.com/uploads/Si...e_11.27.11.pdf (or a similar multi-output board)

In this case the wiring should be as follows (taken from documentation):

- The left RJ12 to profilux L1L2 port
- LEDControl4Passive #1 to driver connector No4 (DC 5V+)
- LEDControl4Passive #2 to driver connector No2 (PWM input)

Works pretty Well down to 7-8% then it starts to twinkle irregularly

I´m not sure at this but I think this is a problem of the LED driver itself

[bjomat]

I´m not sure which of the SteveLEDs board you try to connect. I suggest it´s the http://www.stevesleds.com/uploads/Si...e_11.27.11.pdf (or a similar multi-output board)

In this case the wiring should be as follows (taken from documentation):

- The left RJ12 to profilux L1L2 port
- LEDControl4Passive #1 to driver connector No4 (DC 5V+)
- LEDControl4Passive #2 to driver connector No2 (PWM input)



I´m not sure at this but I think this is a problem of the LED driver itself

Hi Gunther
I use two of these:
http://stevesleds.com/uploads/Quad_L...e_11.27.11.pdf

And I am a bit confused of what you said about:
LEDControl4Passive #1 to driver connector No4 (DC 5V+)
- LEDControl4Passive #2 to driver connector No2 (PWM input)

In my manual to Ledcontrol4passive it says #1 led driver minus all channel #2-#5 led driver channel 1-4
ImageUploadedByTapatalk1360060660.365446.jpg
ImageUploadedByTapatalk1360060681.858144.jpg

Regards
Björn

[Gunther]

And I am a bit confused of what you said about:
...
In my manual to Ledcontrol4passive it says #1 led driver minus all channel #2-#5 led driver channel 1-4

Ups ... you are right, my fault.

Unfortunately the LEDControl4Passive is working with common ground, while the LED driver is working with PWM2ground, so it´s not so easy to connect. I think about it ....

[bjomat]

Ups ... you are right, my fault.

Unfortunately the LEDControl4Passive is working with common ground, while the LED driver is working with PWM2ground, so it´s not so easy to connect. I think about it ....

Thank you so much for helping!!

[Gunther]

L4CP.png
This should do the trick. Unfortunately I have no glue about the needed resistiors.

I would try it with an 1 KOhm ressistor or a 0-10k potentiometer. If the light stays on, it´s to low, if it stays off, it´s to high.

The Rx is only reccomended if you use two power supplies to prevent leckage current via the LEDControl

[bjomat]

If I want to change drivers to run my leds. Any suggestions to use with ghl LEDcontrol4passive. I use two channels running 28x3w leds on each channel.
ImageUploadedByTapatalk1360068672.552555.jpg

[smithpl]

Do you know why ghl4passive leds makes led blinking when we set lighting above 5% ?

I use typical driver with uC MBI6651 and 68uH. With other controllers , which I've tested , there was not simillar problems. It's looks like P4L has wrong algoritm or PWM signal.




Sent from my iPhone 5 using Tapatalk

[Gunther]

Do you know why ghl4passive leds makes led blinking when we set lighting above 5% ?

Does this also occur with the pullups shown in the manual?

[smithpl]

Not yet.
From where should I get V+ ?

From inside Passive4leds? +5 or Vin of driver ( +24V ) ?

In application note for this driver, there is no any information about pullup for DIM channel.

[Gunther]

From inside Passive4leds? +5 or Vin of driver ( +24V ) ?

From your driver. It´s similar to my picture in post #25

In application note for this driver, there is no any information about pullup for DIM channel.

See Manual, image on second page

Hints about dinmension of the resistor:
http://forum.aquariumcomputer.com/sh...1019#post41019
http://forum.aquariumcomputer.com/sh...8715#post28715

According to #2 the resistors should not be lower that 2k