Rebuilding a Roomba Battery for Less

Sat, 7 Nov 09, 12:24 pm

Here’s a thread on how to rebuild a Roomba battery for less, you find ppl out there mod the Roomba 400 with 18650 li-ion batteries adding protection circuitry, do check out vic7767 website too, he talks a great deal about roomba mods. If you are a loss of which Roomba to buy, check out this thread. Here’s a brief rundown of the 5xx series:

510 = basic
530 = 510 + home base compatible & included
560 = 530 + lighthouses and onboard scheduling (wireless scheduling compatible but you’d need the wireless control center)
570 = 560 + wireless control center included

RF modulator

Tue, 27 Oct 09, 12:12 am

I have laid a RG6 cable between the TV point in the sitting room and TV point in the master bedroom during renovation earlier. I was thinking of using the cable to share cable signals from cable box via a splitter and the concept works well. However, I should have laid a composite cable or a component cable or hdmi cable that provide better video resolution, and also newer devices e.g. DVD players, cable boxes etc  does not comes with RF outputs. Now, I have no choice but to purchase a RF modulator that converts the composite audio and video signals to RF modulated signals that can be fed into the television’s aerial / coaxial connector. For now, I would either exchange the existing cable box with another one that has RF output, I guess I still have to purchase a RF modulator for the other devices.

5mW Green Laser Pointer (1*AAA) with Box Black SKU: S008511

Tue, 20 Oct 09, 5:41 pm

check this out 5mW Green Laser Pointer (1*AAA) with Box Black SKU: S008511, just wonder if battery last ?

BartPE Plugin – McAfee commandline virus scanner with GUI wrapper

Tue, 20 Oct 09, 4:58 pm

Before you use the mcafee plugin, download the program and copy it to the plugin directory.

From time to time, check out the latest superdat (dat-xxxx.zip) file from the Network Associates ftp site, the zip file should contain clean.dat, names.dat, scan.dat, internet.dat, packing.lst, pkgdesc.ini and validate.exe. Extract the files into the files folder located in the mcafee plugin directory (plugin\mcafee\files), and you can proceed to use pebuilder to build your boot disk.

WordPress stuff

Mon, 19 Oct 09, 11:00 pm

just added turbo or gears that suppose to speed up the wordpress experience, also added linkages to twitter and wordpress post via email.

LAN wiring at HDB home

Mon, 19 Oct 09, 1:05 am

bro is renovating his place, so i recommended him to think about getting his place local area network (LAN) ready. besides the added security, uninterrupted throughput, faster speeds, an individual subjecting himself and family with prolonged exposure of wifi signals may pose possible health hazards. anyway, I have wired up my place with Cat 6 a year back getting ready for Singapore’s next generation broadband network using fibre optics. I’ve got some links here for those who are interested to get their place connected.

network points

network points

DragonFire's schematic

Dragonfire's schematic

DragonFires simplified schematic

DragonFire's simplified schematic

Links:

Instructables How to Wire Your House With Cat-5 (or 6) For Ethernet Networking

Structured Wiring How To

SmartHouse How To Wire And Network Your Home

HardwarezoneForum Wiring up a HDB for wall LAN pts

SmallNetBuilder LAN and WAN Basics

vrZone Setting up a Cutting Edge Home Network

OpenNet Tips for Home Owners doing their Renovations

Fri, 9 Oct 09, 9:57 pm

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shortlinks

Fri, 9 Oct 09, 6:40 pm

I’ve not been bloggin for a while, so not so familiar with some of newer WP features, they have shortlinks, connections to twitter & yahoo etc now. Gonna check out what are the new features they have installed for the past one year … as for now, shortlink for martinz.wordpress.com is wp.me/h0R, real short huh? :)

Thu, 8 Oct 09, 11:12 pm

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grumbles …

Thu, 8 Oct 09, 8:11 pm

I am a forgetful person, so I am putting this on record. She told me that she had problem teaching him because he’s not concentrating, and asked if I could teach both of them. I would have taken over the task if I can teach both during the short stint of 100 minutes but that translates shorter tuition time per person and its not gonna be good for them. I can’t believe my ears that she actually asked knowing the constraints of time, and other limitations. While she might be right that he need someone authoritative doing the teaching, I thought she had not put in her best efforts turning this into a vicious cycle. During many occasions, I have related to her that its important to speak the mother tongue during tutorial but she refuse to listen, can one imagine a Chinese language teacher giving lectures in English 80% of the time? I have no doubts about her standards in the Chinese language – she did her As majoring the language, but I am concerned that she is not using the appropriate method to teach the mother tongue.  The other problem was her bad attitude and stubbornness. At the end of tutorial, she asked for assistance on a single character that describe the sound of pants tearing apart. It was getting late, and after some searching, we still couldn’t find the appropriate character and suggested to him to check with his teachers the next day. But I am still there checking the dictionary … I told her that we should persevere in what we do, but she rebutted “你可以自己坚持…“ and that implies that I can continue to persevere but not her.  I was dumbfounded by her comments, continue searching for that character and I managed to find one that is close enough. Now, I am contemplating if I should let her continue…  no point forcing the issue if she is not interested. Perhaps, I should go to their place from 7pm – 10pm so there’s more tuition time for both of them.