When you get that itch to build something, it’s difficult to stop unless you achieve a feeling of accomplishment. And that’s how it was with [Rohit’s] boombox build.
He started out with a failing stereo. He figured he could build a replacement himself that played digital media but his attempts at mating microcontrollers and SD cards was thwarted. His backup plan was to hit DX for a cheap player and he was not disappointed. The faceplate he found has slots for USB and SD card, 7-segment displays for feedback, and both buttons and a remote for control. But this little player is meant to feed an amplifier. Why buy one when you can build one?
[Rohit] chose ST Micro’s little AMP called the TDA2030 in a Pentawatt package (this name for a zig-zag in-line package is new to us). We couldn’t find stocked chips from the usual suspects but there are distributors with singles in the $3.50-5 range. [Rohit] tried running it without a heat sink and it gets hot fast! If anyone has opinions on this choice of chip (or alternatives) we’d love to hear them.
But we digress. With an amp taken care of he moved onto sourcing speakers. A bit of repair work on an upright set got them working again. The bulky speaker box has more than enough room for the amp and front-end, both of which are pretty tiny. The result is a standalone music player that he can be proud of having hacked it together himself.
Humans generate a lot of waste. It is somewhat relieving to see so many great reuses of old items out there on the ‘web. We love covering these types of projects here on Hackaday. [Martin] likes using recycled items in his projects and wrote in to tell us about his recently completed Wooden Ghettoblaster that utilizes a bunch of old parts and doodads he had kicking around.
The main case, believe it or not, is constructed of leftover wood flooring. The fake tape deck, buttons and tuner may look like they are just burnt/etched/stained but they are actually inlaid pieces of darker wood. Once all of the inlays were installed in the front face of the cabinet, the entire surface was sanded smooth and the edges chamfered to add some visual appeal.
Holes for a pair of old aftermarket car speakers were not only cut into the front face of the case, they were also counterbored so the speakers would sit flush with the panel. [Martin] did decide to purchase one component for the project, a set of VU meters. They are mounted to the case via their own inlaid piece of wood and are connected in parallel with the line-level portion of the signal path.
Continue reading “Wooden Ghettoblaster Makes Use Of Recycled Parts”
Calling this a boom box is at least slightly ironic. Instead of high explosives it now carries high decibels in its new life as a self-contained sound system.
Despite the conspicuous power cord a peek inside reveals a big enough battery to keep the tunes playing for hours on end. [King Rootintootin] kept the cost on the build down since he was given the used speakers and amp by his girlfriend’s dad. The amp kicks out about 25 Watts with the battery rated at 7.2 Ah. He added a charger and routed the controls to the side of the ammo box so that it can be charged without removal. The only external component is the audio jack which connects it to the music source.
One of the suggested improvements from the Reddit thread is to add baffles inside of the enclosure so that sound from the two stereo channels doesn’t interfere with each other.
[Nathan] took this boombox and outfitted it for Bluetooth streaming. He took a Motorola DC800, which is meant to make headphones wireless, and connected it to the stereo inputs. The controls for the Bluetooth module were routed to the stock tape deck controls and a little bit of frosted spray paint adds a blue glow to the cassette window. Now he can stream music from his phone, including internet radio, which he’s done in the video after the break.
Did he find the most annoying demo video music ever? You be the judge. Continue reading “Bluetooth boombox”