Kitronik 2136, Stereo Amplifier Kit Build Instructions

CREATE YOUR OWN SPEAKER DOCK WITH THIS

ESSENTIAL INFORMATION

BUILD INSTRUCTIONS

CHECKING YOUR PCB & FAULT-

FINDING

MECHANICAL DETAILS

WORKS

STEREO AMPLIFIER KIT

HOW THE KIT

Version 2.0

Stereo Amplifier Essentials

PCB Ref

Value

Colour Bands

R1 & R2

10K

Brown, black, orange

R3 & R4

4.7Yellow, purple, gold

R5 & R6

100K

Brown, black, yellow

PLACE RESISTORS

1

SOLDER THE IC HOLDER

2

SOLDER THE

CERAMIC DISC CAPACITORS

3

SOLDER THE ELECTROLYTIC CAPACITORS

4

CONNECT THE

SPEAKERS

5

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Build Instructions

Before you start, take a look at the Printed Circuit Board (PCB). The components go in the side with the writing on
and the solder goes on the side with the tracks and silver pads.

Start with the six resistors:
The text on the PCB shows where R1, R2 etc go.
Ensure that you put the resistors in the right place.

Solder the Integrated Circuit (IC) holder in to IC1. When putting this into the board, be sure to get it
the right way around. The notch on the IC holder should line up with the notch on the lines marked
on the PCB. Once this has been done insert the 8 pin IC into this socket, making sure that the notch
on the device matches the notch on the IC holder.

There are two ceramic disc capacitors (as shown right). These should be soldered into C6 and C7. It
does not matter which way around they go.

Now solder in the five electrolytic capacitors (an example is shown right). The capacitors have text printed
on the side that indicates their value. The capacitors are placed as:
C1 and C2 = 100F. C3 = 10F. C4 and C5 = 470F.
Make sure that the capacitors are the correct way around. The capacitors have a ‘-’ sign marked on them,
which should match the same sign on the PCB.

The kit is supplied with a meter of twin cable. This cable will be used to connect the two speakers.
You will need to cut this to the required length for each speaker in your enclosure design.
Take each piece of wire that you have cut off and strip the ends of the wire. Connect one end of
each to the two terminals on the speaker (shown right) and the other end of each to the terminals
on the PCB marked ‘SPEAKER1’ and ‘SPEAKER2’, after feeding it through the strain relief hole. It
does not matter which way around these connections go.

Stereo Amplifier Essentials

6

CONNECT THE

AUDIO CABLE

7

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ATTACH THE BATTERY CLIP

The PP3 battery clip should be attached to the terminals labelled ‘POWER’. Connect the red wire
to ‘+’ and the black wire to ‘-’ after feeding it through the strain relief hole.

The stereo Jack lead should be connected to the ‘INPUT’ terminal. First, feed the wires through
the strain relief hole. The black wire should be connected to the terminal labelled ‘BLK’. The other
two can go the either of the two remaining inputs.

Checking Your Amplifier PCB

Carefully check the following before you insert the batteries:

Audio equipment may become damaged if connected to an incorrectly built amplifier.

Check the bottom of the board to ensure that:

 All holes (except the 4 large (3mm) holes in the corners) are filled with the lead of a component.

 All these leads are soldered.

 Pins next to each other are not soldered together.

Check the top of the board to ensure that:

 The four wires are connected to the right place.

 The ‘-’ on the capacitors match the same marks on the PCB.

 The colour bands on R1 & R2 are brown, black, orange.

 The colour bands on R3 & R4 are yellow, purple, gold.

 C3 is a 10F capacitor.

 The battery clip red and black wires match the red and black text on the PCB.

 The notch on the IC is next to C1 & C4.