Quantity   Component name
1 × TDA2003 10 watt amplifier The main amplifier IC in a TO220 casing. Audio quality is not bad considering the ease of use overall.
1 × 7812 Power Management ICs / Linear Voltage Regulators
1 × 7805 Power Management ICs / Linear Voltage Regulators
4 × 2200uF Capacitor Used to feed surges in power by the amplifier
1 × Audio Transformer A cheap line isolation unit (LIU) that eliminates the digital noise from the Bluetooth module
2 × TO220 heatsink Dissipates the heat quite well considering the size of these heatsinks
1 × XS3868 Version 3.0 Bluetooth Module These modules are cheap but beware, the various models / versions vary the pinouts significantly!
1 × Red power LED Just used to show that the amplifier PSU is up and running
2 × 75 Ohm resistor Used for the passive Stereo to Mono circuit from the Bluetooth output
3 × 470uF 25v Capacitor In use at a few places for DC voltage stabilisation and for driving the TDA2003
4 × Assorted Resistors Parts for driving the TDA2003
2 × Common Diodes Used in series to provide a voltage drop to pwer the XS3868 (Bluetooth) from the 7805 5v regulator
1 × Assorted Caps In use at a few places for DC voltage stabilisation and for driving the TDA2003
4 × 1N5404 3A 400V Diode Wired as a bridge rectifier (AC to DC) from the transformer tap
1 × 18VA Transformer The mains transformer, with three output taps @12v, 15v and 18v
1 × Power lead Mains AC cable
1 × 1k Potentiometer Used as a volume control
1 × Volume Knob Just a tad nicer that what I had in the recycled items box
1 × Cut piece of plywood used as a backing Piece of plywood, recycled from another project
5 × 12mm screws Back cover screws
1 × Heatshrink (about 30cm) A must have! Don't skimp on the heatshrinking, ever!