View attachment 3395284
^^^ The rear panel is completed ,everything wired-up and tested (the relay delay modules).
View attachment 3395285
^^ And the drivers,the fan and the grounding were connected to the rear panel.
The fixture 's "updating " is complete .
How it works :
This fixture has 4X Vero29 ,which can be driven up to 1530 mA each one of them .
Each COB is driven by it's own driver (Meanwell HLP-60H-42) .
The drivers are being dimmed via a rotary switch ,with resistors in series ,at each position .
The rotary switch itself is a "Double pole ,Six positions " .So a pair of drivers is connected in each separate "line"
(Pole) of the switch ,with total resistance being >50K per pole.
When the fixture is powered COB#1 is switched ON .
But not at it's preset power output ,but at a lower level.
(
because at it's dimming circuit another driver -being switched off ,for the moment - is parallel connected ,so the-preselected - resistance is actually lower ,
as ,the still switched off driver has about 20K resistance across the Dim circuit pins/wires ).
After a preset(adjustable ) time delay ,COB#2 switches ON ,same as #1 ,
at lower output than it's preset one .
Again ,after a preset time delay ,COB#3 switches ON.
Now ,one of the previous drivers ,outputs it's preset current ,
so now two COBs operate at their preset power level ,
while one remains still "underdriven".
After the last time delay the fourth driver switches ON and
now all four COBs operate at their preset current output.
I ''ll try to upload a vid ,later on ,showing the "Soft-On-Set" feature in action ...
Cheers.