Configuring IPv6 on pfSense for Starhub

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Starhub has been providing IPV6 network connectivity to its customers for quite some time now. I recently discovered this when I saw that my WAN interface has a valid global unicast IPV6 address. Setting IPV6 on pfSense is quite straight forward. However, I did had to do a lot of Google searches and reading up on IPV6 in order to do so.

Gigabit Power Over Ethernet Injectors Project Built

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While going through my electronic project folders, I came across one of my past project, the gigabit power over ethernet (PoE) injector that started some time in May 2012. The motivation for this project was when I wanted to add a second WiFi access point in order to expand wireless coverage for the whole house.
There were limitations or requirements for the task, firstly was the location only had an RJ45 termination nearby and the nearest power socket was at least 5 meters away. Secondly the access point that I would be using is an 802.11n rated 450 mbps transfer speed. In order to fully utilized it, the uplink would have to be gigabit ethernet.


Unbricking The Sony Xperia SP

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Well this isn't a guide about unbricking the Xperia SP but more on my experience throughout the entire process. So, this won't actually be helpful if you are look on a detail guide on unbricking your Xperia phones.
How did my phone get bricked in the first place? I was looking for a root access method in order to remove some of those annoying system apps. Not wanting to mess around with third party ROMs, I decided to try those one touch root exploit method. I came across an app KingRoot that does exactly that. After installing it, everything goes well until I rebooted the phone and that is when things goes wrong. The phone will stuck in a boot loop and hard power off does nothing. At this point I concluded that the phone is totally bricked.

dead android

High Side Switch Using N Channel Mosfet

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I've built up a prototype board for using N channel mosfet as high side switch. Usually, P channel mosfets were used in such application. However, they have higher RDS(on) resistance as compared to N mos and they also cost slightly more. Another downside of using N channel as high side switch is that it requires a form of bootstrapping its Gate voltage as it requires >Vs + Vth in order to fully turn on.


4 Channel Electronic DC Load Project

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This is a backlog entry for my 4 channel electronic DC load project build which started on 26th December 2012 and completed on 27th May 2015. This build is the 3rd iteration of electronic load I've build so far.

Completed 4ch dc load