E-Bike Conversion – Software

e-bike_conversion(pic21)

It’s been a while since I wrote the posts about my electric bicycle conversion project. The bicycle runs fine so far and I finally finished rewriting the software that configures its controller.

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E-Bike Conversion – The Build

Before the conversion

It is time for another post about my electric bike conversion. The photo above shows my bicycle before the upgrade. I bought it as an entry level MTB this spring. Aluminum frame, RST Gila 80mm travel fork with lock-out, Shimano Alivio gears (front derailleur was cheapest Shimano) and drive-train, SDG Bel Air seat, Tektro HD300 hydraulic disc brakes. Nice bike for recreational use in the nature or as a city bike like I use it. I replaced the pedals with platform ones for better grip, added mudguards, a bottle cage and a rack. Also some fairly cheap lights and a bicycle computer from ebay. On this photo the front mudguard is missing since its mounting metal bracket broke. Now it has a new one I made out of 2mm steel L-plate. No more braking apart. Continue reading “E-Bike Conversion – The Build”

E-Bike Conversion – Pre-Build

Recently I decided to convert my city bicycle (actually MTB with trunk and mudguards) into electric bike. The main reason for that is living almost on top of a hill where everything else is at least 50 meters lower and always involves climbing steep streets on my way home. The conversion kit I chose is Bafang BBS02. It consists of a mid drive motor with integrated controller, LCD module with control buttons, e-brakes and a compact lithium-ion battery mounted in the place for a bottle cage on the frame.

Finished e-bike conversion Continue reading “E-Bike Conversion – Pre-Build”

MLTL speakers with Jordan JX92 – part III – finishing touches

Two years after the beginning of my MLTL speakers project with Jordan JX92, it has finally come to an end. I made some finishing touches but nothing significant. The speakers are now freshly painted, have new spikes and second pair of terminals are added for choice of connection schemes. The photos following show the finished speakers.

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MLTL speakers with Jordan JX92 – part II – adding ribbon tweeter

My MLTL speakers project with Jordan JX92 was waiting for a final touch with some paint or veneer, but instead it ended up with HiVi Research RT1.3 ribbon tweeters. As good as JX92 are, we all know that there is nothing perfect. It was absurd to think that 4-inch driver is capable of reproducing perfectly the whole range from around 30Hz all the way up to 20kHz. That is why I decided to add ribbon tweeter and improve the high frequencies after I cut the bass port to improve the low frequencies, sacrificing those below 40Hz. The good thing is that I chose project which allows me to add second driver – second generation 35″ MLTL. Although I didn’t use Aurum Cantus G2 as Jim Griffin did, the final result is OK with me for now. The photo below shows the tweeter already mounted in the speaker. Its front panel isn’t the most beautiful but at least it sounds good.

Continue reading “MLTL speakers with Jordan JX92 – part II – adding ribbon tweeter”