3 replies to this topic

[Fleep]

Hi all,

 

Lighting cabinet buttons for virtual cabinet project considerations. Thoughts and questions.

I've read so many topics in this regard (also LedWiz docs and mjr's great guide) - yet, I'll admit I'm still confused as how to approach this with the below setup.

Sorry if this seems like a dup of older similar topics (but might as well serve other builders with any useful info may rise here).

 

 

So I'm planning to use for all cabinet buttons LED based lighting. For that purpose, I’ll be using LedWiz 32-port controller.

To be on the safe side, I’d be using external power supplies for this purpose (not PC ATX PSU and not via LedWiz USB powering).

 

 

Pushbuttons ('Start', 'Extra Ball', 'Launch Ball' and possibly several other big rectangular buttons):

I decided to go head and purchase SMD based bulbs from Comet Pinball

I bought packs of these two - and will tryout which ones I’d like better. Both bulbs have voltage rated as 6.3V (bulb labeled 6.3V AC). I understand these can be supplied with either AC or DC 6.3V.

 

1SMD bulbs (one 5050 diode), aka supreme brightness, Wedge $555 base, Frosted lens, Sunlight color (Natural White)

https://www.cometpin...t=2072674828332

 

2SMD bulbs (two 2835 diodes), aka intense brightness, Wedge $555 base, Frosted lens, Sunlight color (Natural White)

https://www.cometpin...t=1806558560300

 

These bulbs seem to be drop-in replacement for all existing incandescent bulbs in real pinballs so those who simply replace bulbs - seems like a plug-and-play thing.

But as far as using LedWiz to control them - seems like many things need to be considered here.

To begin with, for voltage and current supply - I’d like to use an external 5V DC PSU with sufficient current rating not to possibly put any stress on the LedWiz board

 

 

 

Flipper and Magna Save buttons:

I think I’ll go head and purchase 4 of these RGB button boards for flipper and magna save buttons:

https://shop.arnoz.c...avec-prise.html

 

As these boards require 12V I’ll use external 12V DC PSU with sufficient current rating.

 

 

 

 

So, to conclude all this, my concerns are:

 

#1 (Pushbuttons) How should these bulbs connect to LedWiz when driven with an external 5V DC Power Supply?

#2 (Pushbuttons) Should these 6.3V SMDs have a resistor connected in series to limit their current consumption? Is this actually needed in this case? If so - How would you calculate the resistor value in this case?

#3 (Flipper and Magna save buttons) How should these boards connect to the same LedWiz controlling the pushbuttons but with 12V voltage?

#4 (Flipper and Magna save buttons) Same question regarding current limit - Is this required for these LED boards? How would you calculate the resistor value in this case?

 

[gtxjoe]

1. See this post for ledwiz wiring diagrams

https://www.vpforums...als&article=153

2. Bulbs should already have resistor. Only the raw LEDs parts like those used in rgb flashers would need to be designed with resistors

3. Look at the wiring diagram and you will see that the ledwiz voltage banks has no voltage connected to it. This allows you to mix 5v, 12v toys on the different pins. Recommendation is to put 5v toys on one ledwiz bank and 12v toys on a separate one if your layout allows

4. See 2

[Fleep]

Thx gtxjoe

Was a good lead and read.
I made a schematic draft to illustrate my plan.
Attaching here; I’ll appreciate anyone who can review





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Edited by Fleep, 08 August 2022 - 04:34 PM.

[Fleep]

Okay, here is an updated schematic after a brief review by LedWiz (Thank you Randy!)
This now includes fuses on the mains +V rails, updated LED labels with their voltage, and a slight LedWiz output layout change.




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