Author Topic: Electronic help (again)  (Read 1670 times)

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Chris333

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Electronic help (again)
« on: October 24, 2007, 05:15:26 AM »
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OK back when I built this On30 0-4-0:

I had plans to add this very simple sound system to it:
[img width= height=]http://lh4.google.com/ErieChris333/Rx8K9RrjjLI/AAAAAAAACUQ/UMaar8cpYUA/s800/DavSound%20001.jpg[/img]
All it does is make a staticy rumble sound that sounds like a motor running (the 0-4-0 is gas-mechanical)
I built the circuit without the right side (Lights) and it worked, but the sound was very quiet. The locomotive running drowned out the sound, and this is not a loud running locomotive.

Well Tom has got me itching to buy one again (hey only $40) and I want sound.

Does anyone know how I can make this circuit louder?

The speaker is a 8 ohm, .87", 1.1watt Kobitone.

Thanks

Chris333

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Re: Electronic help (again)
« Reply #1 on: October 24, 2007, 05:24:29 AM »
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I just dug out the old circuit I built and see it does have the light parts on it. Do I need the bridge rectifier and if I'm not using lights?

Will a different speaker alone make it louder? If so what speaker should I get? it needs to be the same size to fit behind the radiator grill.

tom mann

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Re: Electronic help (again)
« Reply #2 on: October 24, 2007, 08:03:14 AM »
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What a cool idea.

Chris333

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Re: Electronic help (again)
« Reply #3 on: October 28, 2007, 01:15:20 AM »
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Just stopped in to feed the crickets.

Iain

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Re: Electronic help (again)
« Reply #4 on: October 28, 2007, 09:18:56 AM »
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How much space do you have?  Probably the only way to make it louder is with an amp.  They make Analog IC amplifiers that are, if I remember correctly, the same size as a 555.
Thanks much,
Mairi Dulaney, RHCE
Member, Free Software Foundation and Norfolk Southern Historical Society

http://jdulaney.com

Chris333

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Re: Electronic help (again)
« Reply #5 on: October 28, 2007, 09:41:53 AM »
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There is room for a 555 plus...

Do you have any more info on this? Where to purchase? How a moron (me) can install it? Does it run off of the track power or will it need a battery?

I can't find the old speaker so testing will have to wait till a new one shows up.

Sokramiketes

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Re: Electronic help (again)
« Reply #6 on: October 28, 2007, 11:16:44 PM »
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Just checking, but your test speaker is in an enclosure of some sort?  It will be very quiet if it's not...
Mike

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Chris333

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Re: Electronic help (again)
« Reply #7 on: October 29, 2007, 03:20:12 AM »
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Back then no it didn't have a box. I will try that, but knowing larger speakers, I don't see how a speaker that has a sealed back would sound different in a box. I will try it though.

Iain

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Re: Electronic help (again)
« Reply #8 on: October 29, 2007, 08:38:47 AM »
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Check Mouser, they have a whole page on Audio and Video amp ICs.
Thanks much,
Mairi Dulaney, RHCE
Member, Free Software Foundation and Norfolk Southern Historical Society

http://jdulaney.com