Audio Amplifier Kit - STA540

This is a stereo amplifier kit designed to make use of the [STA540](http://www.sparkfun.com/commerce/product_info.php?products_id=9557) power amplifier IC. Once this kit is completed you have a fully functional, two-channel audio amplifier, complete with a standby switch, volume control and indicator LEDs. The kit also includes a 6400BG heatsink for the STA540 to dissipate any damaging heat.

In this kit, the STA540 is configured as a dual bridge amplifier capable of delivering up to 2x 38W (4Ω at 18V). Power supplied to the kit directly powers the STA540 and should be within 8 to 22V.

This kit comes as a bag of parts, you'll need to solder everything to the PCB. All components are through-hole, so it shouldn't be too difficult; but this kit is a bit more complex than our other through-hole kits.

**Includes:**

* 1x STA540 Audio Amplifier Kit PCB
* 1x [STA540 Dual/Quad Power Amplifier](http://www.sparkfun.com/commerce/product_info.php?products_id=9557)
* 1x [6400BG Heatsink](http://www.sparkfun.com/commerce/product_info.php?products_id=9576)
* 1x [LM358 Op Amp](http://www.sparkfun.com/commerce/product_info.php?products_id=9456)
* 3x [LED - Basic Red](http://www.sparkfun.com/commerce/product_info.php?products_id=533)
* 1x [SPDT Mini Power Switch](http://www.sparkfun.com/commerce/product_info.php?products_id=102)
* Resistors:
* 5x 10K Ohm
* 3x 1.0K Ohm
* 2x 47k Ohm
* 2x 100k Ohm
* 2x 10k Giant Trimpot
* Capacitors:
* 3x 0.1uF-50V-20%
* 1x 100uF - 25V
* 4x 0.47uF-25V
* 2x 10pF - 200V - 5%
* 3x 1uF - 50V - -20,+80%
* 1x 1000uF/25V
* 5x 2-Pin Screw Terminal - 3.5mm
* 4x Nylon Round Female Standoff
* 5x Phillips Screw with 4-40 Thread
* 1x #4-40 Hex Nut

**Documents:**

* [Schematic](http://www.sparkfun.com/datasheets/Kits/STA540%20Audio%20Amp%20v11.pdf)
* [Eagle Files](http://cdn.sparkfun.com/datasheets/Kits/STA540%20Audio%20Amp%20v11.zip)
* [Assembly Instructions](https://cdn.sparkfun.com/assets/a/4/b/a/c/PM-9612-Audio_Amp_Kit_STA540.pdf)
* [GitHub](https://github.com/sparkfun/Audio_Amplifier_Kit-STA540/tree/V_1.1)