You may also need an AF signal generator.įeed AF signal generator output to the left input channel at CON2. You’ll need a 12V battery or an AC/DC adaptor to test your final prototype. CON1 is used for connecting 12V regulated power supply. Connect a 4-ohm, 6W speaker each across LS1 and LS2. Connect the left and right channel audio inputs across CON2.
Mount two 2-pin terminals for connecting LS1 and LS2 speakers. Now solder all the electrolytic capacitors and resistors as per the circuit diagram. If the PCB layout is used, place the IC in the space provided for it. Mount LA4440 IC in the middle of the veroboard. The middle common terminal of this connector is to be connected to the ground. Solder a 3-pin connector on the PCB/veroboard for audio input. Then, take a 25-watt soldering iron and solder all the components, as shown in the circuit diagram.
4: Components layout of the PCB Download PCB and Component Layout PDFs: click hereįirst, collect all the components like electrolytic capacitors, resistors, IC LA4440, 3-pin connectors, wires, etc. 3: PCB layout of the stereo amplifier Fig. You can assemble the circuit on a 5cm×7cm veroboard or on a PCB whose actual-size layout is shown in Fig. The left channel audio input is connected to pin 6 of IC1 through capacitor C1 (4.7♟/35V), and the right channel input is connected to pin 2 of IC1 through capacitor C2 (4.7♟/35V). The right speaker (LS2) is connected to pin 12 through electrolytic capacitor C9 (220♟/25V).Ī 3-pin connector (CON2) is provided for connecting the audio input signal. The left speaker (LS1) is connected to pin 10 of IC1 through electrolytic capacitor C8 (220♟/35V). The electrolytic capacitor C12 (1000♟/35V) is connected between +12V and ground to act as a filter.
Pin 11 of IC1 is connected to the +12V power supply.
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