Mandalorian Mercs Costume Club

Mandalorian Armor => Equipment & Accessories => Electronics => Topic started by: Kalrir on Jul 08, 2017, 02:07 PM

Title: Rigging blaster for sound that already has lights
Post by: Kalrir on Jul 08, 2017, 02:07 PM
I recently enlisted the help of a couple friends for my first foray into electronics to create a blaster with lights and sounds. It was quite the learning experience, and we successfully installed the lights running off of a 9 volt battery. From here, we're hoping to adapt this to also creating a simple blaster sound when the trigger is pulled. However, this was foreign territory and we possibly fried an old hasbro e-11 board in the process? Thus, I turn to you good people.

I was interested in following after some of the threads before that used the Adafruit components. I initially thought I would only need the board (https://www.adafruit.com/product/2133) and speaker (https://www.adafruit.com/product/1890), after assurances that we could achieve appropriate wattage by removing some of the 1.9w LEDs (which we had increased to five from two to, as I understand, better bear the load of the 9 volt?), but it looks like we might also need the mono amp (https://www.adafruit.com/product/2130) as well?

Any help on the matter would be greatly appreciated! Also open to suggestions for alternative sound setups.

(https://i.imgur.com/oC5wrqI.jpg)
Title: Re: Rigging blaster for sound that already has lights
Post by: Fi-8015 on Jul 09, 2017, 05:27 AM
From what I see on the page you will either need an active speaker or amplifier.

I hope you know:
Quote
needs a 3 to 5.5VDC battery
You will either need to switch to different batteries or use a DC converter.


Further I would suggest to use one LED with the corresponding resistor instead of 5.

Calculate it with this Formula:

R=U/I

U=Usupply-ULED

Assuming it is a 1,9V LED with a current of 20mA and you connect it to 9V, you would need a resistor with 355 Ohm. Next common value is 390 Ohm.
Title: Re: Rigging blaster for sound that already has lights
Post by: Legion on Jul 09, 2017, 10:14 AM
Hard for me to tell without seeing everything assembled. I have recently done similar work, transferring NERF Star Wars sound boards into custom guns and converting them from 3~4.5V alkaline batteries to 5V USB power banks. Added trigger LEDs to one of them. Key is definitely limiting your voltage so you don't burn out components.