What Are You Building Today

[Michelag]

Let's see if I'm gonna have a happy birthday...

[Pars]

There's an awful lot of solder on your SMD parts.

[Michelag]

6 hours ago, Pars said:

There's an awful lot of solder on your SMD parts.

I'm still getting better at it

[G600]

Think of it as a layer of glue, not as a solder dome like with through hole.

And don't worry, electrons will flow!

[Omega_ELS]

On 10/11/2025 at 8:34 PM, Michelag said:

 

Hello
Are these converters quiet?
thanks for reply

Is there a difference between

the USA24400S-8 or the USA12400S-8?
They differ only in the input voltage.

Do they create a buzzing sound in the headphones, as is usually the case with cheap DC-DC converters?
Can they be used to power an amplifier with +-400V?
My HVRV power supply just broke. I'm thinking of installing two of these USA12400S-8.

thanks for reply or any information.

 

 

By the way, here's the HVRV board.
I think he was inspired by Kevin's amplifier idea—the photo shows the same 20 transistors, 4 capacitors, and resistors.

[Michelag]

On 11/15/2025 at 10:17 AM, Omega_ELS said:

Hello
Are these converters quiet?
thanks for reply

Is there a difference between

the USA24400S-8 or the USA12400S-8?
They differ only in the input voltage.

Do they create a buzzing sound in the headphones, as is usually the case with cheap DC-DC converters?
Can they be used to power an amplifier with +-400V?
My HVRV power supply just broke. I'm thinking of installing two of these USA12400S-8.

thanks for reply or any information.

 

 

By the way, here's the HVRV board.
I think he was inspired by Kevin's amplifier idea—the photo shows the same 20 transistors, 4 capacitors, and resistors.

Yes, they're quiet to my ears. No noticeable noise in the cans. In the main thread, Dr. measured "ringing" at I don't know how many MHz. If you can find them, go for them. The supplier that I bought from, has them out of stock now.

And yes, the difference is the input voltage.

On 10/13/2025 at 8:49 PM, G600 said:

Think of it as a layer of glue, not as a solder dome like with through hole.

And don't worry, electrons will flow!

Yes, thanks, I'll see some video on YouTube and I'll become a pro! 😁