I hope I haven't crossed the boundary from informative to plain boring. MAXIMUM VOLTAGE CAUTION: The maximum voltage that the Amplifier Module can handle is 16V. To avoid damage, please check the actual output voltage of your AC Adaptor with your multimeter, and confirm that it is well below 16V before connecting up. It is now time to get your box ready for mounting the components. Stick blank white stickers on the surfaces on which you are going to mount your connectors and controls. In my case I decided to have a front and rear - like a full sized amplifier. I marked out where each control would be (see the pictures). 1 pc Plastic Box. Mine is approx 8cm x 5cm x 2.2cm (31/8" x 17/8" x 7/8"). Please also read my reply to another similar question. You can't connect a headphone to this amplifier. Headphones with the normal 3.5mm jack require that one of the speaker terminals of each of the amplifiers is connected to ground. In this amplifier module the speaker terminals are "floating". If you short the two negative terminals of the speaker output together to connect them to the common point of the headphone jack, you'll be lucky if nothing blows. I haven't come across any solution to this, besides having a separate headphone amplifier. Unfortunately you can't connect normal headphones with a stereo jack to this amplifier module. The reason is that the four speaker terminals are "floating". This is a bridged output amplifier. There is no ground connection as in normal push pull class AB amplifiers. If you connect any one of the terminals to ground or connect the negative speaker terminals together you will short out some of the output components of the amplifier resulting in smoke! The purpose of the input capacitors is AC coupling, effectively DC blocking. This is also explained in these chats below. ADDITIONAL PROTECTION: As mentioned previously, you can damage the Amplifier Module if you use a different polarity AC Adaptor than the one your Amplifier is wired for. You can prevent this from happening by adding a single diode in series with the positive connection to the PCB. The wiring modification is shown in the attached diagram. Once you have confirmed that all your wiring checks out and there are no shorts, AND if you have connected the series protection diode recommended. You can happily connect your AC Adaptor, your speakers (push each wire all the way into the connector till it reaches the start of the insulation - to prevent short circuit) and your MP3 player (via the earphone jack), turn up the volume slightly and power on. Enjoy the sound. If you didn't use the protection diode, one further precaution you can take before powering up is, keep the Red +12V connection to the Amplifier Module disconnected, plug in the AC Adaptor, power on, and using your multimeter in the DC range, Red lead to the disconnected Red wire and Black lead to any Black (ground) connection, check that the voltage reading is positive (around) 12V. 1 pc Knob for the above potentiometer - colour to suit your theme. It is easy to make your own Mini-Drill:. At the Power Switch (point 2) if you are expecting down to be On and up to be Off, set the switch in the Down position and and with your multimeter in the Ohms range, measure the resistance between its two solder points. If you get anything besides zero Ohms, the switch may be upside down. Loosen the mounting screw and rotate the switch till the lever is now up. Put it in the down position and check the resistance again. If it is still not zero Ohms, you may have a defective switch. 1 pc 12V 2A AC Adaptor or wall wart - more details in the attachment. The drill chuck with interchangeable collets is available from Ebay - very cheap. Check the mounting hole diameter with the seller before buying. It should match the shaft diameter of your motor. I like your idea but their is a problem with my board. …i am using 3 li-ion laptop battery with a 3s power supply. .but i don't know why this board (PAM8610) is macking a annoying sound. . i want to use this board for my school project plss help me to get out. . Finally enlarge the holes with the Reamer following the guidelines in the previous section. The hole for the 3mm LED is not enlarged unless you are using a bigger size LED. The results are shown in the pictures above - absolutely neat holes with no further cleaning up to be done. As you can see from the picture with the components mounted, all the components are screwed in except the speaker terminals which are super-glued to the box after passing the leads through the 1mm holes. Make sure that the terminal holes in which the speaker wires are inserted point upwards for easy connection. The LED is push-fit or held in place with contact adhesive. I have made another of these amplifiers, involving an additional PCB in a smaller box 5cm x 3.5cm x 2cm, which I will publish soon. Did you make this project? Share it with us! I Made It!. The sticker provides a clean white surface for making clear markings and also protects the surfaces from scratches while drilling, etc. Next, using the hand-drill, drill the pilot holes with a 1mm drill in the places where each control comes through. When I started this Instructable, I wanted it to be a short quick instruction for beginners, to show how simple it is to make a reasonably powered small size stereo amplifier. As I kept writing I found that there was more and more that I needed to explain to make the project a success for beginners. Rather than include it all in the main text, I have made a couple of PDF attachments. Detailed Description of the Parts in the Parts List.pdf. Besides these you will also need multistrand (7-strand) hook-up wire (various colours) for the interconnection of the components. Attached is a PDF with very detailed explanation of each of the parts in the parts list. I wrote this mainly for beginners, so if all you need is the parts list, you can skip most of it and just read the part on the AC Adaptor - very important. Hi, I want to connect 32 ohm headphones instead of speakers - is it possible? The headphones have +R;+L and ground only so how to connect them to 4 speaker terminals? And what is the purpose of adding 10uf capacitors before volume control?. 'Octomom' Nadya Suleman celebrates Mother's Day with 10 of her TEENren: Photo AOL.com. 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