Inside Phone Watch

Finally, The phone watch was disassembled.



[See all photos]

Power Amp Class-D (part 2)

I went to Baanmooh today gain.
At first I am going to buy two of Power Amp Class-D 20W
But I saw this, Power Amp Class-D 12+12W, 690 BHT.

12W+12W CLASS D Specifications 1. 12W/CH, 8 Ohms Load at 15 Vcc 2. No Heatsink 3. 32 Step DC Volume 4. Vcc 8-18 V 5. Imax 2 A at Po 12 W 6. Shutdown 160 uA

It uses digital volume control to adjust both level simultaneously.
So there will be no noise generated when the volume got dirt.

No pop/click sound generated when turning on/off power switch.
(The same as 20W.)

I have measured its power consumption:
- No sound, 15 mA
- Playing at normal level, 25 mA
- Driving SubWoofer speaker, 125 mA




[See all photos]

Modify Car MP3 Player (part 2)

Oops! I did it again... errr... I mean I bought it again.

A Car MP3 Player, 220 baht, with a new circuit design. (But the same crap sound quality)
So I added an antenna and 2 capacitors to add more treble.
Now its sound quality is better than some radio stations. ;-)

- Antenna, use thin wire about 36 cm. long.
Then soldered at ANT label.
(I forgot to take the photo)

- Use 2 small 0.0068uF capacitors, then soldered into the space as shown in photos.
(I found only the big one from my spare)

- Use cutter to cut the plastic filter between LCD display and infrared receiver.
(Don't know what's that filter for)




[See all photos]

Sigma 18-200 F3.5-6.3 DC OS lens

Sorry. This post was not available in English.
คลิกที่ เพื่ออ่านบทความเป็นภาษาไทย

Delete unused COM ports

1. Click Start -> Run -> type cmd
2. Type set devmgr_show_nonpresent_devices=1 then press Enter
3. Type devmgmt.msc then press Enter
4. Click View -> Show hidden devices
This will display devices that are not connected to your computer.
You can right-click, then select Uninstall to remove them.

Credit: http://www.mp3car.com/vbulletin/software-software-development/110742-delete-unused-com-ports-say-inuse.html

Modify Windows Vista to obtain IP address automatically

To resolve this issue, disable the DHCP BROADCAST flag in Windows Vista. To do this, follow these steps: 1. Click Start, type regedit in the Start Search box, and then click regedit in the Programs list. 2. Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{GUID} In this registry path, click the (GUID) subkey that corresponds to the network adapter that is connected to the network. 3. On the Edit menu, point to New, and then click DWORD (32-bit) Value. 4. In the New Value #1 box, type DhcpConnEnableBcastFlagToggle, and then press ENTER. 5. Right-click DhcpConnEnableBcastFlagToggle, and then click Modify. 6. In the Value data box, type 1, and then click OK. 7. If the DhcpConnForceBroadcastFlag is 1, double-click and modify it to 0. 8. Close Registry Editor. By setting this registry key to 1, Windows Vista will first try to obtain an IP address by using the BROADCAST flag in DHCP Discover packets. If that fails, it will try to obtain an IP address without using the BROADCAST flag in DHCP Discover packets. MORE INFORMATION If you know the router or the non-Microsoft DHCP server does not support the DHCP BROADCAST flag, you can set the following registry entry as follows instead of using the DhcpConnEnableBcastFlagToggle registry key. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{GUID} Value name: DhcpConnForceBroadcastFlag Value type: REG_DWORD Value data: 0 Note A data value of 0 disables this registry entry. You can use this registry entry to prevent Windows Vista from using the DHCP BROADCAST flag. After you set this registry entry, Windows Vista never uses the DHCP BROADCAST flag. Credit http://support.microsoft.com/kb/928233

How to get GUID value? 1. Click Start, type cmd, press Enter. 2. type ipconfig /all, then look for Physical Address of your adapter. 3. type getmac, then you'll get the Transport Name as GUID value.

But if the IP address is still unable to be obtained, the only way to do is to fix IP address, Gateway, and DNS address in Windows Vista.

It's NOT my birthday

When I say I'm gonna buy cake, why people always ask me "Whose birthday???"
I just wanna eat cake. That's it!

This is vanilla baby cake from 7-11, 52 BHT.




[See all photos]