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 Forum index » DIY Hardware and Software » Circuit Bending
Power LED Blocks Audio in Bent Book Strip
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southboundpachyderm



Joined: Jan 03, 2020
Posts: 3
Location: California

PostPosted: Fri Jan 03, 2020 5:24 pm    Post subject: Power LED Blocks Audio in Bent Book Strip Reply with quote  Mark this post and the followings unread

I'm bending a small book strip and I'm trying to add a power switch with an LED to show the unit is turned on. The power switch seems to be working fine, but when I test the LED in line, it cuts all audio from the unit. The LED does light up when the unit is powered on, though. I've tried placing it in several different points on the circuit and it does the same thing every time. Does anyone know why it would block audio like that? Is there a different way you're supposed to wire up a power LED that I'm not aware of? Any help would be greatly appreciated!
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efluon



Joined: Jul 20, 2019
Posts: 8
Location: Hamburg

PostPosted: Sat Jan 04, 2020 2:57 am    Post subject: Reply with quote  Mark this post and the followings unread

What is a book strip?

Maybe you forgot the current limiting resistor and the power supply is so weak and voltage so low above the diode voltage that instead of burning the led it just collapses to led voltage? Does the led get warm?
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southboundpachyderm



Joined: Jan 03, 2020
Posts: 3
Location: California

PostPosted: Sat Jan 11, 2020 11:31 pm    Post subject: Reply with quote  Mark this post and the followings unread

It's from a children's book that has a simple audio device attached. All it does is play sounds when you press the buttons. It's very basic.

Yes, I did forget to use a current limiting resistor. That solved the problem. Thank you!
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