Posts Tagged ‘Biker Sound System’

A new Gadget 2.0

Wednesday, July 6th, 2011

YEAH!!!!

Behold! I finally upgraded my [bike sound system], adding extra power, a subwoofer and a battery charger for everlasting supply. It doesn’t look as decent as the last one did but it totally rocks. The first test run was a trip to the [Fusion Festival], around 120 kilometers. The dynamo provides enough power to reload the batteries while the system is playing.

I started of with the [TDA7052] 1W amplifier I had already used with the old sound system, only this time I used two, one for bass and one for mid/high frequencies. But the TDA is made for 8Ohm speakers and my bass speaker had 4Ohms and so had the two high/mids in parallel. So I decided to get something bigger. Now I have an [AN7148] delivering 2×2,5W at 12V 4Ohm which is totally sufficient to predominate the occurring head wind and most traffic noise :)

The battery charger was built according to the circuit provided by [forumslader.de] . Documentation is in German only but it’s extraordinary! It’s housing has still to be completed. To be done in time for the Fusion Festival I was a bit in a hurry.

The AN7148 in its housing. Batteries (9xNiMH) sit at the right.

The battery charger

The battery charger

 

A New Gadget

Wednesday, August 4th, 2010

Living in Berlin forces me to do quite a lot of cycling every day. These extensive trips tend to be quite boring when they repeat themselves and music helps passing the time. My style of driving allows no earplugs and since the shipment of speakers for the Diskokugel arrived, I came up with my own bike sound system.
It’s made up out of standard sewage parts (fire proof, for what its worth) and hold a tda7052 as amplifier. I’m thinking about making a series to sell them, but for now the cost of the parts add up to € 12,- and it takes some time to build them. Seems, electronic devices are only cost-efficient when assembled by children in asia :-(

The raw parts

The raw parts

Biker Sound SystemBiker Sound System

The TDA7052 runs on 4 AAA batteries and lies on the bottom of the tube. There is also the on/off switch. The whole system is (hopefully) waterproof.

The TDA7052 runs on 4 AAA batteries and lies on the bottom of the tube. There is also the on/off switch. The whole system is (hopefully) waterproof.


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