How to power an external amplifier board through the Wav Trigger?

Components & Accessories Power
1

Hello Everyone,

my question is rather basic but I am not able to find the answer online or in the hookup guide.

I would like to use the Wav Trigger with an external amp board.

I received everything but I am not sure how to supply the power the amp.

It requires DC 12 to 24V.

As a newbie, except knowing that I will have to use a power supply between 12 and 15V, I don’t know exactly how, and where to plug power output on the Wav Trigger.

Thank you very much for your help.

Charles

2

Hi Charles.

The WAV Trigger isn’t designed to power an external amplifier and there are no pads on the board for that purpose.

You will probably want to use a separate power supply for the amplifier and WAV trigger, but if your power supply is less than 15 volts and capable of providing enough current for both the WAV Trigger and amp, you could split it’s output and run power to both devices.

3

Hi Chris,

thank ou very much for your reply.

Indeed, I thought it was possible through the WAV trigger.

Can you please give me a bit more details about the solution you are talking about.?Once again, as a newbie I am not sure about how to proceed.

I talked about a less than 15V power supply because the WAV trigger seems to work between 6V and 15V.

Thank you very much for your help.

Charles

4

Hi Charles.

Solution A:

2 power supplies. One for the WAV Trigger, the other for your amp. It’s just a simple connection from one to the other.

Power supply 1 —> WAV Trigger

Power supply 2 —> Amp

Solution B:

One power supply, wire your amp and the WAV Trigger both to the same power source. They would both essentially be in parallel with one another.

Power supply 1 - → WAV Trigger

Power supply 1 /–>Amp

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5

Ok. Sounds very clear… Thank you for the drawings!

I’d definitely go for solution B.

So I guess I need a dedicated power board or something like this?

Can you give me an example please? Does Sparkfun provide something like this?

Thank you so much!

6

Hi Carlos.

You will need a power supply that can handle the maximum expected current draw from your amp, plus about 500mA for the WAV Trigger.

I don’t know what your amp requires so it’s hard to say exactly what power supply you need but we do have a [12 volt 5 amp power supply that might work. (It’s likely way bigger than you need, but would probably work.)](Power Supply - 60W, 12V - TOL-14934 - SparkFun Electronics)

7

Thank you again.

I see which power supply to choose and the one you require looks good.

However, how to split its power between the amp and the WAV trigger?

Is there a dedicated board to do so?

Thank you so much for your help.

Charles

8

Hi Charles.

We do not have a board for this, it’s just simple wiring circuits in parallel.