hello everyone
I bought some parts from ebay, i wanted to make some cool led signs for myself but i didn't want to have a wall wart.
so i bought these guys.
**broken link removed**
i was very excited to finally receive them (chrismass!! yeah my life isn't too exciting
but as soon as i plug them in with about 1M of resistance as a load, the thing actually start to make a pretty loud noise.
(actually both of them were quiet for a few seconds the first time i plugged them in, then started the noise. now it wont go back to being quiet)
it sound like living next to a power station, that little dzzzzzzzzzzz noise.
So i have a few questions for you,
do you think it is normal?
do you think it is safe? would it still be safe if i put it in a box, leave it plugged in for years on end?
is there anything i can do to reduce the noise?
is there some precautions i should take while using those things?
Please keep in mind i'm very new to electronics, please if you want to help me, keep things on a pre-school level and mention even the obvious things that everyone knows!
thank you!
I bought some parts from ebay, i wanted to make some cool led signs for myself but i didn't want to have a wall wart.
so i bought these guys.
**broken link removed**
i was very excited to finally receive them (chrismass!! yeah my life isn't too exciting
but as soon as i plug them in with about 1M of resistance as a load, the thing actually start to make a pretty loud noise.
(actually both of them were quiet for a few seconds the first time i plugged them in, then started the noise. now it wont go back to being quiet)
it sound like living next to a power station, that little dzzzzzzzzzzz noise.
So i have a few questions for you,
do you think it is normal?
do you think it is safe? would it still be safe if i put it in a box, leave it plugged in for years on end?
is there anything i can do to reduce the noise?
is there some precautions i should take while using those things?
Please keep in mind i'm very new to electronics, please if you want to help me, keep things on a pre-school level and mention even the obvious things that everyone knows!
thank you!
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