Portable Amplifier Project Updates...

Now the project is nearly completed except the final phase. Pictures below shows the 80% completed project. Last pic timed back at 5.08am...

Speaker output connections and the switch from a drill

Interior of a massively modified salvaged DVD player

The "speaker out" to "line in" converter - Key to noiseless subwoofer

Now the amplifier and subwoofer is located at my computer's department for further testing

Current project status: About 80% done...

Satisfactory results gained.

Final step:

1. Get a correct switch so that I can cover my "DVD" with a cover

2. Getting a LED to light up at its correct voltage as an indicator when the amplifier is powered up

3. Recalibrate the sound of my subwoofer to match with my speakers at desired level (Although its already very good now)

4. If possible, enable a microphone connection to the amplifier as well. Therefore this will become a portable amplifier with mic. Great for small group lectures + music/sound input from CD/computer for presentations!

Project to be updated...

Personal Science Project Report

Aim: To reconstruct and re-alter the input and output of subwoofer in able to boost the maximum capability and usage including functions of a true subwoofer.

For past few days (since monday), I had been working to amplify my subwoofer louder.

Monday

A good research till 4am

Tuesday

- Evening: Purchased amplifier @ RM38 at Brothers KJ. Did not buy something expensive as recommended by salesperson, but headed straight to the cheapest amp. Sales person chased me out on my first attempt to get a cheap one. But my persistency in the shop for hours made me chosen a right amp with another salesperson (Who is very desperate to get a sales done that day)

- Midnight to morning : Installed and not working as loud noise overcomed the original sound itself + Found out that need to buy a converter

Wednesday

- Evening: Bought a converter which changed "high-input" to "line input"

- Midnight to morning: Experiment with line converter but does not seemed working as no sound is heard to be output. But later stage found that it actually works with little noise. Tried grounding the amplifier to Earth and got better. Seconds later got worse. After removing the Earth wire, it's better now. Therefore will proceed without Earth connections anymore. Very satisfied with capabilities that can be done by amplifier to add the subwoofer volume.

Thursday

- Midnight to morning: Dismantle everything in an old DVD player and prepared to put my amp and converter into it. Last pic taken is 5.36am.

Original placement of DVD parts after removing the case

Removed the main power supply

Removed the DVD player dock

Removed the last DVD processor

Placed my Proline GP-118 amp+converter in. Wired it up. Stripped the connectors of my converter and its 5.36 a.m.

Project updates to be continued...

Revival of 2 posts...

Both last post are really old and unfinished...

14/08/08

23/05/09

Just don't want to keep it as draft anymore, so i just post it....

Yay! Holidays.... Sure boh?

Daily Digest of first day of holiday....

First day of holidays!

Yea, so basically a supposingly "long" holidays started. For this holidays, planned to do a project. So lets do it on first day of holidays!

I have a old Sony TV Woofer (Still sounded very good from an old 29" CRT TV). 15 Watts, at least better than any cheap speakers on LCD or Plamsa TV on market. It does really pump up some good low frequency sound (Bass). Initially, I opened up the whole woofer to tap the speaker's positive and negative connections with wires. And it's connected to my Micro Hi-Fi, which also served as my computer speakers.

The woofer on top of micro Hi-Fi.

View from front

However, the woofer sounded disappointing. The sound generated is considered inaudible from far / on top of my micro Hi-Fi. Unless you put it in front of you, then you can really get some good bass of it.

So? My TV, which is just opposite my computer... Yo, a really old 90's 14" CRT TV, not LCD / Plasma k? If not then happy till no need blog dy la... Sanyo CAP4012L, which still can be seen on some TARC busses.

Picture: still nice as its seldom used after it "migrated" to my room.

Sound: Mono-speaker system (That's really ok in the 90's but now = disappointing)

Sounded quite bad in terms of bass as it used only a "toy-speaker". So I decided to add this woofer to it. Hoping it will have an audible bass though.

After getting some simple tools, I opened the whole back cover of the TV. Just 4 screws! (TV nowadays = 2 screws but prepared to break open other connectors).

Obvious enough, the humungous space at the back is for the picture tube.

After giving the circuit board a good vacuum (Very free), realized a sticker patched on top right of TV tube. Sanyo - Warning!... (Not important) and...

Made by Samsung, Korea. Wow! A Japanese brand took their main stock from Korea? Funny but true. 90's wei, Japanese technology is the best at that time... Korea? Not heard before until today

With enough of exploration, I headed straight to the speaker. As expected, 2 wires popping out from the speaker. But what's even better is it has 2 long positive and negative plate for the speakers wires to be wrapped around it. Just as wished gua. No need to tap wires! I quickly inserted 2 connectors and screwed tight down to the plate.

Screwed the connectors with identified positive and negative connections

Screwed the wires

Returned it back to its original place

Now is the problem of getting the wires out of the box... I have no drill (Doubt i'll drill perfectly also). So searched for holes behind the TV. Spotted 2 weird shaped but small holes behind the TV. That's great! Just that its too small for my wire to go through. I stripped of the insulator and the core wires got through. Phew! (Notice that the green wire is just an extra). Tested with direct connection to the woofer straight away. It's just wow... The low and mid + high frequency just matched each other so harmonically. At least i'm able to get some bass when watching TV3 Cinema ok? lol. It sounded even better when I played CD with my 1996 Thomson VCD. (Yea, I agree all my media can be sent to museum dy.)

Stripped wires popping out from the back of TV

Perfected it by shortening the wires and inserted a connector to it

Now it's a lot neater now. Quickly secured the woofer wires and Voila! It's just great, great and great! Got my TV cover back to its position and done.

Sanyo + Sony = Twins?

It just sounded like I have a mini theatre system running on this TV. The bass volume is good and just nice. Just nicely sync with the mono 2W speaker tone. The longer I place my eyes on this TV, the more I like how it sounds. Very satisfied with this simple and great invention. Enjoying a 14" TV was never like this before in my life.

Now what? According to principles of GP........ Must always have conclusion le. Since Malaysia Day is around the corner, I shall stress the importance of Malaysia's independance. We shall appreciate what's now. And the easiest way? Supporting people like me! All customly "Made in Malaysia". Well, we shall really be proud of our country... Because...

We're Proudly Made in Malaysia!

can you please make my book rack disappear from my view forever? Thank you.

Was doing some cleaning of my book rack on 22 Dec 2009 starting at 9.24pm (According to my pic time). Lol. A lot of memories flash back le. Waliao, after SPM still can't forget, cham lo.

Procedure to clean up your "junks":

Step 1: Take out all your books k?

Step 2: As reference to the picture below, go through every page of your notes. For double sided printing papers, pile it on one side. If its only single sided prints, tear it out to be used in your printer/draft paper/toilet paper/kitchen towel/bath towel also can. As long as you reuse it. Save the earth man! My tuition centre offers 80gsm papers, its papers quality enables double sided printing to be done without jamming your printer although its old/folded.

These papers are just too good to be thrown away.

Precaution: Some staples will just break off before you even touch it, but some may cut you + rusty too. Lol. Its a hectic time for me to remove all the staples for single sided prints just to not spoil the paper. Some of my prints has 3-4 staples near to each other to hurt my fingers even more. refer to the picture below for some examples.

All my accounts tuition notes has at least 2 staples on each leaflet.

Some interesting stuffs to be shared:

From my tuition teacher marking of my 启事, I think he really had a massive headache marking my papers, plus he's 60+ dy. LOL.

Another 新闻稿... Headache for him too... I always face problems remembering how to write chinese words + grammar probs too.

The chinese paper that never been signed + approved + taken = Pro? Yes its pro.

This is where rise my confidence in taking my accounts. my first term mock exam at tuition centre.

But on the second mock examination, I failed. LOL.

Just realised my tuition centre even give out real SPM accounts papers for our second term mock exam. Look at my buku tunai... 0.9 marks weih, pro.

Aiya, forgotten to return Hui Nee's note that I borrowed. Hui Nee you won't mind hor?

Quote from the infamous CyanBoy: "To be success, don't read success." Loyal Success book supporter man! With exception of my Accounts book from Sasbadi and Pelangi for my Chemistry. (But I still don't success in "Success-less" subjects)

Exercise books that I touched like few weeks before SPM. Can't finish some but done 5/7 books. Still good la. (Still can't answer SPM questions)

Wait, how can I forget my chinese book! Cerdik loyal supporters man. (But their English exercise book can throw with >60% of their answers wrong)

Ohya, and say hi to these books that I bought but didn't touch before during form four. Lol.

Long time no update huh? > a year didnt touch blog.

Too relax at home now. I think my brain rust dy.

More posts coming up!

Isn't It A Bit TOOOOOOOOOOOOOOO LATE to realise?

Kurangkan sukatan pelajaran peperiksaan SPM

Selasa, 31 Mac 2009

KUALA LUMPUR - Kementerian Pelajaran bercadang untuk mengurangkan sukatan pelajaran bagi beberapa kertas peperiksaan berbentuk subjektif dalam Sijil Peperiksaan Malaysia (SPM).
Timbalan Ketua Pengarahnya, Dr. Haili Dolhan berkata, cadangan itu bertujuan mempercepatkan proses penyemakan dan pengumuman keputusan peperiksaan SPM yang mengambil masa agak lama untuk diumumkan.

Katanya, cadangan berkenaan tidak bermakna akan memendekkan sukatan pelajaran sebaliknya bertujuan mengurangkan penumpuan kepada aspek penilaian keputusan SPM berasaskan peperiksaan.

''Sebagai contoh, keputusan SPM tidak lagi tertumpu kepada keputusan peperiksaan 100 peratus malah bergantung kepada kemahiran sampingan berkaitan mata pelajaran tertentu seperti menghasilkan kertas projek, amali dan sebagainya.

''Bagaimanapun, cadangan ini masih dalam rangka kajian dan memerlukan penelitian terperinci memandangkan kertas peperiksaan SPM mempunyai standard peperiksaan yang tinggi," katanya.

Beliau berkata demikian kepada pemberita pada Majlis Sepetang Bersama Media sempena Pesta Buku Antarabangsa Kuala Lumpur 2009 di sini semalam.
Cadangan itu ialah antara pendekatan yang akan digunakan kementerian tersebut untuk mengatasi masalah penyemakan dan pengumuman kertas peperiksaan SPM yang mengambil masa agak lama.

Menurut Haili, kementerian itu juga bercadang untuk menambah bilangan guru pemeriksa kertas peperiksaan SPM bagi mempercepatkan proses penyemakan.
''Buat masa ini, kita mempunyai bilangan pemeriksa kertas SPM dan Sijil Tinggi Persekolahan Malaysia (STPM) yang agak kecil jika dibandingkan peningkatan jumlah pelajar dan mata pelajaran yang diambil.

''Ada pelajar yang mendaftar sehingga 20 mata pelajaran dalam SPM dan ini mengambil masa agak lama untuk disemak memandangkan jumlah pemeriksa yang terhad,'' katanya.
Bagaimanapun, katanya, cadangan-cadangan ini masih dalam pertimbangan dan sekiranya relevan untuk diaplikasikan dalam peperiksaan SPM, ia akan diperkenalkan awal tahun depan.

恋人未满 Brown Eyes

Knew this song very long dy... Today heard it from my transport radio on the way to school. Found it quite meaningful, so... It's up here!

English version ( A bit different but meanings quite the same though)