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Old 22nd January 2017, 06:01 PM   #1
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Default Boom Box TDA1524 Circuit Help

Hi,

I am attempting to construct my first speaker and have a few very ignorant questions:

1.) What input types are allowed for the Lin and Rin inputs labeled in the schematic below? Would I simply use an auxiliary cord connection for both (ie connecting to an iPod/similar mp3 device?)

2.) Would the speakers be connected in series at the Rout and Lout connection points?

Here is the schematic:https://cdn.instructables.com/ORIG/F...3DGY65QG9K.jpg
Here is the TDA 1542 spec sheet:
TDA1524A Datasheet (click technical spec sheet on the product page)
Thank you in advance for the help!
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Old 23rd January 2017, 03:05 AM   #2
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That is a Preamp chip, it cannot drive a speaker.

jer

Last edited by geraldfryjr; 23rd January 2017 at 03:07 AM.
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Old 23rd January 2017, 07:34 PM   #3
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Appreciate the help, would an amplifier then connect to the output? Would the input be an auxiliary connection from iPod/like device?

Thanks
Dave
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Old 24th January 2017, 12:03 AM   #4
ICG is offline ICG  Germany
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You can ofcourse connect an amp to the preamp but most amplifiers have enough gain for an ipod to be used without any preamp between them.
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Old 24th January 2017, 02:36 AM   #5
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You can connect the inputs any way you want. I've used alligator clips a lot. The wretched RCA is the hi-fi standard. XLRs work better but are overkill for small audio. Stereophone plugs/jacks won't stand hard use but are fine for home use, and natural if you live on iPod.

That chip is a volume+tone control. To drive a loudspeaker you add a Power Amp after it.
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Old 26th January 2017, 01:43 AM   #6
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Thank you all for the help, what type of amplifier would be best for this application? Can you give an example of a part number that you would suggest?
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Old 26th January 2017, 04:30 PM   #7
ICG is offline ICG  Germany
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You could combine it with almost all amplifier boards. That depends on your speakers, deeded volume (=power) and your power source and speaker concept (Mono, Stereo, 2.1?). You should use a single-rail/single-voltage amplifier to make the power part much easier to realize.

A TDA7492 or TPA3116 would be a good choice if the battery has 12V (or more), for 5V a PAM8403 works fine.
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Old 27th January 2017, 11:40 AM   #8
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Sorry I should have mentioned my speakers, I have two Dayton DA135-B speakers and two Tang Band W2-800SL speakers. Does this change your amp recommendation?

Dayton:
Dayton Audio DA135-8 5-1/4" Aluminum Cone Woofer

Tang Band:
Tang Band W2-800SL 2" Aluminum/Mg Full Range Speaker Driver
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Old 28th January 2017, 12:30 AM   #9
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Well, yes. The PAM8403 doesn't have adequate power and works a lot better with 4 Ohm, same for other 5V amps. The TDA7492 and TPA3116 are fine, the TDA8932 is a good option too (and extremely cheap). You can go for 12V or 18V (a lot more power).
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Old 13th March 2017, 07:49 PM   #10
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Hey I am having issues wiring the control circuit, I bought several RAC cables, stripped them, and tried splitting them appropriately at the input and output but cannot get it to work. If I am trying to plug the aux cable into an ipod or iphone, what cable should I purchase to effectively split the signal to both the right and left input? What cable should I purchase to split the left and right outputs to the amplifier specified above?

Thanks in advance!
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