> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# Audio Amplifier Kit - STA540

**Type:** Product page · **SKU:** KIT-09612 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/audio-amplifier-kit-sta540.html ([markdown](https://core-electronics.com.au/audio-amplifier-kit-sta540.html.md))

## Retired product

This product is retired and no longer available for purchase. Replaced by: ADA1752.

**Replacement:** https://core-electronics.com.au/catalog/product/view/sku/ADA1752

## How to buy

- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

This is a stereo amplifier kit designed to make use of the [STA540](https://core-electronics.com.au/search/?q=009557) 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 (4O 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.

**Kit Includes:**

- 1x STA540 Audio Amplifier Kit PCB
- 1x [STA540 Dual/Quad Power Amplifier](https://core-electronics.com.au/search/?q=009557)
- 1x [6400BG Heatsink](https://core-electronics.com.au/search/?q=09576)
- 1x [LM358 Op Amp](https://core-electronics.com.au/search/?q=09456)
- 3x [LED - Basic Red](https://core-electronics.com.au/search/?q=00533)
- 1x [SPDT Mini Power Switch](https://core-electronics.com.au/search/?q=00102)
- Resistors: 
    - 5x 10K Ohm
    - 3x 1.0K Ohm
    - 2x 47k Ohm
    - 2x 100k Ohm
    - 2x 10k Giant Trimpot
- Capacitors: 
    - 1x 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](https://core-electronics.com.au/attachments/localcontent/STA540AudioAmpv11_27647719786.pdf)
- [Eagle Files](https://core-electronics.com.au/attachments/localcontent/STA540AudioAmpv11_36897c97c71.zip)
- [Assembly Instructions](https://core-electronics.com.au/attachments/localcontent/SFE03-0010-KitCard-AudioAmp-ReadersSpreads_03_316993c4e0a.pdf)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/a/u/audio_amplifier_kit_-_sta540__kit-09612__01.jpg)