Power Supply for Amp

[BubbaGump]

I built a small audio amplifier and have completed the entire amp, I just need to know how to hook up a power supply with a 9V battery, and the stereo mini phone plug (which part is left channel ect.) Thanks for all the help.

[jaycee]

The instruction sheet on the site covers that

[Sonusthree]

OK, Like Jaycee says the powering arrangements are pretty well explained in the documentation and marked on this schematic as +Vin (8- 18V) and Gnd.
9 volts is close to bare minimum voltage but will do for low volumes. A bigger concern, perhaps, is the recommendation for a 1 - 2 Amp power source. What kind of batteries are you referring too and how many do you have. It may be possible to optimise the maximum output and/or battery life by using more than one at a time.

[Sonusthree]

Originally posted by BubbaGump
..... and the stereo mini phone plug (which part is left channel ect.) Thanks for all the help.

Are you going to use mini phone plugs for both input and output? Perhaps you mean sockets?

Anyway, On a minijack:
Tip - Left channel
Ring - Right channel
Sleeve - Gnd (common)

Google is your friend! Or maybe you are not on speaking terms?

[BubbaGump]

Yeah, the battery thing was a dumb question, and I figured it out, I also figured out the jack thing. Output is my speakers, and input is the plug, right? Now about the battery. I am planning on just using one Energizer 9V battery. I need it to be small on space. How could I achieve more amps if that wasn't enough?

[Sonusthree]

Originally posted by BubbaGump
...... Now about the battery. I am planning on just using one Energizer 9V battery. I need it to be small on space. How could I achieve more amps if that wasn't enough?

Do you mean a PP3 9Volt battery? I think at this stage you should just try it for yourself and see what happens. I guess that you will have to keep the volume low to avoid distortion and maintain sensible battery life. Other batteries may be better suited but you say that space is important. It would be better if you could fit two or (even four) PP3 into your project.

2 batteries wired in series would give approx. 18Volts and the output would go louder but battery life will not be so great.
2 batteries in parallel would give longer battery life and perhaps better sound than a single PP3.
4 batteries (combination of series and parallel) would allow the maximum 18Volts and the extra battery life but maybe space is too limited.

Take care when connecting your batteries. They can get mighty angry when shorted out.

Also bear in mind that speaker efficiency is a big deal when you have little power to play with. What are going to use this little amp for? Does it have to be battery powered?

[Nordic]

The supply voltage requiredfor this kit is 8 - 18V DC at 1 to 2 Amps

The current is the problem here.

[BubbaGump]

Im making small portable speakers (altiods mint tin is enclosure), and my drivers are only rated for 4W, so even that 9 Volt can supply more than my speakers need. Although, perhaps some drivers that could get louder but are still small, or a smaller amp, (the amp I built will not work for this, I just wanted to get an idea) would help alot. Also, any recoomended elctronics books for beginners?