Home Theater Automatic Cooling – Hardware

Furniture manufacturer IKEA hardly makes any TV tables, capable of accommodating large audio-video equipment for home theater systems. On top of that the few available models haven’t been designed with cooling in mind so they have no opening on the back to let the hot air out. This might easily result in overheating of expensive equipment. I decided to solve this issue with my home theater system by designing automatic cooling device. It has two zones of operation for which temperature limits can be set separately. It uses two digital temperature sensors and two PWM controller cooling fans.

This first part of the project will be about the hardware I chose and the PCB design.

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Hi-End Speaker Cables

Recently I started updating my sound and home cinema system. Most of it of course I bought from different shops, but some things I like to do myself. It saves money sometimes and counts as a hobby. What did I do? Well, I didn’t have enough time to design and build my own amplifier or another pair of nice speakers, so I ended up making my own speaker cables. What’s so special about that? You just get some cable, strip the ends, put it in the screw terminals on the speakers and the amplifier and you are done, you say. Not when you try to achieve high performance. Here is what it looks like.

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It isn’t very difficult to make such nice looking cable and it saves money. Continue reading “Hi-End Speaker Cables”

E-Bike Conversion – Software

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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 dérailleur 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 it’s mounting metal bracket broke. Now it has a new one I made out of 2mm steel L-plate. No more braking. 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 now are freshly painted, has 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 тонколони с Jordan JX92 – част III – финални доработки

Две години след началото на проекта ми за MLTL тонколони с Jordan JX92 най-накрая той стигна своя край. Направих малка доработка, но повече съществени промени няма. Тонколоните се сдобиха с нова боя, крачета и по още един чифт конектори, даващи възможност за избор на свързване. Следващите снимки показват завършения вид на проекта.

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