18/KIT. Amplifier V2

In this time, I have decided to re-purpose one of the speaker boxes from December. It was claimed during work, where the owner lends the speaker for free. It was an 8-ohm speaker, all housed in a wooden case, and has spring tabs for connections. To make the project by a snap, I have decided to use one of the kits from Velleman, the VM114 7w amplifier. Combine that with the mischievous parts, such as a 1-gang box with ears for an enclosure, and you got a complete mono amplifier.

<Entire Amp>

The amplifier was powered through mains, but it uses the power supply inside, to convert that 120VAC into a 12VDC, which the amplifier uses. It uses an amplifier chip, the TDA2003, which will help amplify the signal from a sound source, and outputs it to the speaker. It also has a 10k ohm potentiometer (not supplied with the kit), to adjust the amplifier volume to get the right level of decibels.

<Back View>

As mentioned, everything is mounted onto the giant speaker box, since this provided a structure for the circuitry. The junction box will be another enclosure for the circuit; where it was then mounted to the speaker box. That way, the circuit will not be completely exposed.

<Wiring>

The problems with the amplifier are that there is feedback noise while it was turned on. And touching the jack-which leads to the input connections, makes more of these sounds. Thankfully, the potentiometer is here to lower it, though it decreases the level, and every time a sound source is active, the noise is being replaced completely.

However, even with these problems, it can be solved, and I would recommend this kit for any mono amplifiers, as this kit itself can deliver through the big speaker!

<Typical circuit from the kit>