[Noisebridge-discuss] How close do I need to get with amperage?

[Jonathan Lassoff]

Hrm... isn't it the other way around?

Normally, when I'm choosing a suppy, I look for something at an
appropriate voltage and then see if it can supply at least enough
current to meet the power draw of the device's load.

Danger and risk will really depend on how sensitive the hardware is
and what kind of filtering, supplies, and power conversion is going on
inside.

Most non-cheap modern-ish things seems to have pretty flexible
semiconductor regulators that'll take 7 - 20v and do the needful.
For example, I would feel comfortable feeding a 5v, 500mA (5v * 0.5 A
= 2.5 Watts) device with a 7v, 400mA (7v * 0.4 A = 2.8 Watts) supply.

Cheers,
jof


On Thu, Dec 20, 2012 at 4:34 PM, John Ellis <neurofog at gmail.com> wrote:
> Rachel,
>
> Yes, its safe as long as the power supply amperage is less than "required".
> The voltage should match though.
>
> -John
>
> On Thu, Dec 20, 2012 at 4:32 PM, rachel lyra hospodar <rachelyra at gmail.com>
> wrote:
>>
>> I have a piece of audio gear (roland micro cube) that requires 9v & 185 mA
>> .  I scored a power supply that supplies 200 mA but am wondering if it's
>> safe to use or if it might fry the amp?
>>
>> R.
>>
>>
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