12-24V BOOMBOX
Introduction: 12-24V BOOMBOX
I wanted to make a cool retro looking plywood Boombox which would have lot of meters.
I wanted it to show how many Amperes and Volts it uses and I also wanted to make it so I can choose does it use 12V or 24V.
This was not so easy to write so please ask questions if something is unclear.
Please read it through before making any purchases or framework.
Supplies
Here's the part list.
Plywood, thicker the better.
4mm plywood
2mm plywood
Speakers:
GHXAMP 6.5 INCH 40W Bullet Full Range Car CD Speaker Woofer Glass Fber Low Frequency Long Stroke HIFI Home Theater Speaker 4OHM|Bookshelf Speakers| - AliExpress
I couldn't find same tweeters but these are similar:
2pcs 74MM Waterproof Tweeter Strong Magnetic Car Speaker Neodymium Iron Boron 4 Ohm 5W Automobile Loudspeaker Horn Tweeter| | - AliExpress
I couldn't find same amplifier anymore but heres similar.
Amplifier:
New 2*50W+100W TPA3116D2 Bluetooth 5.0 Power Subwoofer Amplifier Board 2.1 Channel TPA3116 HIFI Audio Stereo Equalizer Amp|Operational Amplifier Chips| - AliExpress
Voltmeter:
DC 62T2/65C5 3V 5V 10V 15V 20V 30V 50V Class2.5 Analog Voltmeter Voltage Meter Measuring Gauge|Voltage Meters| - AliExpress
Ammeter:
65C5 1A 2A 3A 5A 10A 30A 50A DC 0 20A/75MV Measure Range Round Analog Panel Ammeter Gauge Amperemeter|analog panel ammeter|analog ammeterammeter analog - AliExpress
VU-meters:
One Pair High end 52mm VU Meter Level Meter dB Power Meter + Driver Board|vu meter|vu meter levelvu driver board - AliExpress
Frequency divider:
Frequency Divider Accessories Audio Treble Bass Portable Speaker Home 2 Way Adjustable Easy Install Sound HIFI Crossover DIY|Speaker Accessories| - AliExpress
AUX-wire:
1M 3.5 mm male to Female Car Truck Dashboard Waterproof Flush Mount 3.5mm 1/8" AUX Audio Jack Extension Cable With Mounting 3FT|Data Cables| - AliExpress
Also toggle switches, one on-off and one on-off-on. Speaker wires, some other wires, fuses.
2pcs 12V 7Ah lead acid batterys
Piano hinge.
2 charging terminals. I used SELV-charging terminals.
You need basic woodworking tools
Table saw,
router,
clamps,
drill,
jigsaw,
access to CO2 laser would be also good.
Step 1: Frame
I wanted the frame to have end grain look so I cut stripes out of plywood and then I glued them together.
Then I used drum sander to have those flat.
You can use belt sander or hand planer etc.
Dimensions of the parts:
Front face: 56cm x 37,5cm
Sides: 15cm x 37,5cm
Top and down are just normal plywood cut in dimensions. 58,5cm x 15cm. You might want to do these bigger and then flush trim with a router so they are flush.
I used 2 12V 7Ah batteries so this point you should measure that they will fit in and make a separate room for all the electronics. 485
I left about 13 cm height for the electronics and i glued plywood at this point in the middle. You might want to drill 2-3 little holes for the wires at this point. It's much more difficult later.
I didn't use any fine jointing here, I just glued them together and then I glued these little stripes inside corners so it would be stronger.
After electronics middle board is glued, then it's time to glue back. Back is in two pieces and I used piano hinge so I can get access to electronics. (Cut room for the hinge on the lid.)
I glued little wooden pieces on the top corners where I attached rampa nuts so it would be easy to open and close.
(First glue little wooden pieces in place, after place the lid in the right place and drill a hole in both in same time, then you can get those both holes in right place same time.)
I decided speaker places and cut holes with jigsaw. (End grain is good for leveling all the holes.)
I wanted speakers to point out better so I made these little raises. 599