Cheshiretaurus

I use Tamiya masking sheets for larger masks on a portrait cutter and for smaller masks just apply some Tamiya tape direct to the back of the cutting matt and position your cuts on to that. Works for me

Yes, I use Microscale Set and Sol with them works just fine.

I find one of these quite useful https://www.amazon.co.uk/Molotow-Grafx-Masking-Liquid-Marker/dp/B00FVPXAM4

This would be perfect for standard LEDs however its 5v so wont supply the 9v or more required for your disco LED but still good as a starting point for simple circuits Ive found an online LED resistor calculator that you might find useful. https://ohmslawcalculator.com/led-resistor-calculator Did you say that your orange LEDs are in groups of 7 (7x20mA)? if so with 3.3v x 140mA = 0.462watts, in LED terms thats going to be super bright, so probably no need to go anywhere near full power with them so that will help reduce the power requirement.

Very true but, relevant when trying to assess a power supply requirement as getting one too small will be overloaded.

Thanks, does it say how many mA they draw?

The 450mA supply I mentioned was an example, What you actually need would depend on your application. Whats the current of the LEDs you will use have you got a link to them?

Its not just the voltage its also how much current the supply can provide. If your disco LED needs 9v to operate then you could run your other LEDs from the same supply just need a higher value resistor. Add up the current required by all the LEDs and add maybe 50% so your power suppy is not Running at max. As an example if you have say 30 LEDs at 10mA that is 300mA so you should look for a minimum of 450mA for your power supply.

Thats a good idea, its a good investment to learn more circuits on in the future.

2 options for adding the red & green :- you could have them both share the same resistor(still needs to be calculated) or each on their own resistors.

Now it gets complex as you will need a controller circuit for that!

So you want to do something like this for your orange LEDs? I've not included the red & green LEDs just yet.

What figures did you use to get to 330ohm? (Foreword voltage and current of the LEDs) Your red & green LEDs could be connected in parallel to your 5v supply along with another separate current limiting resistor. Or you could add them in parallel to your existing LEDs with the same 330ohm resistor.

I use one of these. Might be cheaper in Hobbycraft or The Range. https://www.amazon.co.uk/dp/B004VRPX8M/ref=cm_sw_r_cp_awdb_imm_G79YZR9NA0QQEENYY2GH?_encoding=UTF8&psc=1

Get a UV glue pen and allow it to form a blob, once your happy with the shape, shine the UV light on it. Here's an extract from a P51 build I did, of course the colouring is optional Punch some 1mm discs out of self adhesive aluminium tape and fix them in the light recesses Tiny drop of Tamiya clear colour in each light Followed by a drop of UV cure glue to make the lens.