Category: gadget

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Bose QC15 headphone cable pinout schematic

I love my old Bose Quietcomfort 15 headphone, so much that I decide to add a Bluetooth receiver to it to keep it in service for a couple of more years. During the process, I needed to DIY a short audio cable to connect the headphone and the Bluetooth receiver. I couldn’t find any information about the pinout on the Internet, so I disassembled the original cable to find out the schematic.

QC 15 audio cable disassembled.
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How to install Windows 98 SE on Thinkpad X41

Recently I wanted to play with one of my old PDAs, and its sync software requires a parallel port and Windows 98 environment. Virtual machine does not emulate the parallel port well. Because Thinkpad X41 is my oldest machine with a parallel port (on the dock), I tried to install Windows 98 SE on it.

It turns out X41 was too “new” for Windows 98. There are some driver issues that I can’t resolve. But for my purpose, the result is good enough. So I’m documenting the process here, hope it helps others.

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Bluetooth Receiver TT-BR06 volume mod

Last year I bought a TaoTronics TT-BR06 Bluetooth Receiver to use with my iPhone. It works great, and the sound quality is fine. The only issue was that the volume was too loud. I am using it with a pair of Sony XBA-N3 earphone, it was uncomfortably loud even on the lowest volume.

Front of the product

Recently I looked up for this product on Amazon, and I found a review that mentions a modification that can adjust its output gain. I tried it and it worked like a charm. So I’m documenting this mod here. Maybe it also applies to other similar brands of Bluetooth receivers. So if you have similar problems, you can have a try.

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Sony CLIÉ PEG-SL10把玩

近期看到一个词：low-fi，专门形容那种喜欢古老技术的人，我觉得这个词很适合我，因为我喜欢十几年前的电子产品，它们简单、底层，没有当今那些花里胡哨一层又一层的技术包装，更能凸显技术的纯粹。黑白屏幕的palm就给我这样一种感觉。

黑白、干电池、带扩展的palm是我的理想选择，主要是因为省电、电池没有老化问题，并且不受可怜的内存的限制。市面上的黑白电池机有很多，但是m125和SL10是仅有的两款带存储卡扩展的palm（其实还有TRGpro、Handera 330这些老怪兽，市面上基本见不到了，我也就不想了……）。m125在半年前入手一台，SL10则迟迟没有合适的。甚至想过让朋友在ebay帮忙代购，但也没有价廉物美的。近期在tompda上看到这个机型，毫不犹豫地就买了一台。

正面特写
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Nokia 770从入手到精通（八）N770搜索不到wifi无线网络的问题解决

几个月前，我的N770忽然搜索不到wifi无线网络了。具体表现为：笔记本和ipod touch都可以搜索到并且连接到wifi，N770却搜索不到任何网络。我把N770拿到图书馆去，又可以搜索到wifi了，很奇怪的故障。

最近google了一下，在下面的网址发现了这个bug report。
https://bugs.maemo.org/show_bug.cgi?id=2082

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Nokia 770从入手到精通（六）N770 的USB Host模式(下)软件篇

USB键盘的使用
如果完全按照上一篇日志来的话，切换到usb host模式，插上线之后键盘就应该可以工作了，但是键位有点别扭，比如主回车键在xterm下居然不是回车，得按小键盘上的回车键才行。
USB键盘要玩rdesktop的话，需要在rdesktop的选项中勾上“BT keyboard”，进去以后键盘操作很爽~

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Nokia 770从入手到精通（六）N770 的USB Host模式(上)硬件篇

USB设备分为HOST（主设备）和Client（从设备），只有当一台HOST与一台Client连接时才能实现数据的传输。

N770默认是工作在Client状态的，所以连接到电脑上以后会以一个U盘的形式存在。现在我需要把N770变成一个USB Host，支持连接鼠标、键盘、硬盘、U盘、MP3、USB HUB、USB转RS232等一堆设备，好处多多。

哈哈，这只是画画饼而已，N770的确可以接上述设备，但是实用性不高。不过，对于玩机一族，还是很值得一试的~

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Nokia 770从入手到精通（五）N770 OS2006上的FTP客户端Maemo FTP

由于经常要上传下载一些小文件到N770上，所以用ftp做中转是一个比较好的办法。OS2008有gFTP，不是很好用。可惜OS2006上连这个不是很好用的ftp客户端都没有。本来有个tnftp的命令行工具，但是从官方源里被删除了。好在最近发现了另一个图形化的ftp工具——Maemo FTP，用起来相当方便。

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