Headlight Booster

Want more JUICE out of your stock headlight, and do not want to modify your existing wiring. Click to learn more.

HID charging conversion

Are you tired of Battery depletion everytime you uses your newly installed High Intensity Discharge Headlight, Click for solutions.

Fixing OIL drain plug thread

Are you looking for fixing that oil drain plug that went bad and unable to thread that bolt due to loose thread, Here is an easy solution for, CLICK for detais.

Led Light Solution

Wanting to conserve battery power of your motorcycle? Why not change all of your indicator BULBS, such as signal light, tail light and brake light to LED BULBS. Click for more info.

HOW CDI WORKS

CDI is the heart of your ignition, wanting more power than STOCK but do not want to buy such RACING CDI? You need to know how it work first to understand where to START improving the ignition. Click for more.

Horn Interrupter

Want to have a horn sounds like a machine gun that produces successive sound with only one press of the HORN switch, add spice to that annoying stock horn, CLICK for details.

Reusable OIL filter mod

Paper element OIL filter tends to suffer from clogging, so why not try this filter mod I am using with my small motorcycle for more OIL flow.

Related Posts with Thumbnails

Last Updated: June 17, 2017

GPCV1248 Action Camera Teardown


500% Fake 4K camera
Action camera, Dash cam, bloomed over the years, and there are too many of them on the market today. The battle is out there, and when there is a war of action camera, so as false advertising and specification. Others are just grabbing every photo out there, compile it in an article and voila. Instant selling marketing strategy. To ordinary consumers, they are misleading, but to tech junkies out there. Who can be fooled?

Picture above represent one misleading details of an action camera. It was bought in a local online store here in my country just to tear it apart. For 24 us dollars ($24), yep that's the price of that camera. I know what I am doing and not expecting anything from the inside. As I've said, the purpose is for educational only. To be familiar everyone what was inside this little camera.

Tearing it apart is actually very easy. Too many related videos on how to dismantle one, and so I didn't made in so just browse the net for it.The front panel will just snap and replaceable. No wonder why everything seems to be a look alike of one another.

OK let the tear down begin and show what was hidden.



Components of a fully functional action camera.

1. Plastic back cover to protect the TFT module.

2. Body case to hold the hardware

3. The hardware cover before the front panel to where it was attached

4. Front panel which is interchangeable with other panel.

5. TFT module attached to the main hardware by ribbon cable.
6. The battery

7. The hardware that contains the Chipset, Cmos sensor, etc etc.

Closer look of the Hardware.

Remember, not all action camera are the same. they might fit of the same body, internal components may vary. We won't be able to detect what was inside, up until we tear it down and visually inspect.

The PCB board stamp detail with the date of manufacture.
Here we see the board detail.

KHE-H40C- V1.3, as of now i haven't found any information about this board. Other PCB is color green, this one is blue.

The Wifi module, with part umber SV6030, responsible for connecting this device to your phone via dedicated application software, so that when turned on, what the camera see, you will also can navigate every detail like settings, live video feed on your phone.You can also manage those clips recorded and transfer it to your device storage for easy sharing over to your favorite social media site.

The CHIPSET or CPU

The heart of every action camera. The encoder, the decoder, the converter, the integrator, and the developer of what the camera eye can see.

This is one part of any pcb that you are paying for. It defines the overall QUALITY of your camera. The one that process all the much needed resolution a good camera will be.

when the camera is cheap, do not expect anything from it more than what you imagine. There are entirely too many out there. But this camera with the price of $24. I didn't expect and not surprised of what I saw from the inside.

This camera uses General Plus Chipset. GPCV1248, and according to the data sheet. Well guess what..the maximum resolution it can process was 1080p@30fps, with a video file type of AVI ot Audio Video Interleave, and a codec of MJPEG, This type will record clips that shall entirely consume all of your precious micro SD card space. LOL. As much as possible, Avoid those kind of camera. Look for the H.264 codec,and MOV or MPG file type of video recording details.

The Cmos Sensor. (the eye of the camera)

The CMOS sensor is the eye. What it sees will be process by the chipset. This determines the pixel effectiveness of all camera. Sony, Panasonic, Omnivision,Aptina, Samsung and etc are example of manufacturers.

There is also a battle for supremacy here, each having their own identity and effectiveness, but more often found on some expensive types are the Sony and Onmivision.

The picture of the CMOS sensor of this camera is unknown with part number T278CB. If one is planning to buy an action camera, make sure the CMOS sensor is there on the description of the item, not just it is 12M, 14M, or 16M..without the detailed Cmos sensor chip. there is no way to improve your camera.

The SPI Flash chip
The one that holds the software of your camera..the FIRMWARE as they commonly called by developers. Each camera have their own IDENTITY, this is where it holds up, what version and model of your camera was.

Not all camera with same hardware will have same SOFTWARE. This where people brick or make their camera be dead by FIRMWARE update.Without the original dump. The camera is junk and unuseful. There are forums out there that have mods, and hacks pertaining to action camera. They are the ones that progress the development of some firmware for better functionality of the camera. This camera uses PN25L16,

The TFT 2 inch screen
Your viewing part of the cameras menu, live video. Firmware have so much effect on this part of a camera, Again not all camera have the same part number.

Here, the camera uses HLGD-CMI121B, I can't find any informtaion of this TFT LCD as of this writing.

Few years back. GoPro version 1 did not have any viewing screen fitted when you buy those type before, instead they are add on and sold separately. to where it was attached via connector at the back side of the camera. As technology progress, The TFT now been fitted at the back of every dash cam, sports cam, high end cameras like DSLR, point and shoot cameras, for easy navigation of the function such as setting menu, playback option of recorded video clips.

BATTERY MODULE
Battery of this camera was the same of those SJ4000, SJ5000, clones, and other non branded camera.

Capacity ranging from 900mah, up to 1200mah.


Firmware of this camera is so difficult to extract for almost all forum i went to, there is simply no description on how to extract it. None. So buying camera without any FIRMWARE support is like a road to the DEAD END. no where to enhance everything,

To summarize everything The camera that was teardown is as foolows

1. Chipset- General Plus GPCV1248
2. Cmos Sensor T278 (unknown manufacturer)
3. 1080p@30fps maximum video recording
4. Video type AVI with MJPEG codec
5. PCM audio recording at 32khz
6. No image stabilization for there is no accelerometer chip installed
7. No gyro as well
8. No Time lapse recording


Looking for an Action or Sports Camera..AMBARELLA or NOVATEK is your only choices of chipset, but be aware that they are expensive CPU, so definitely they are far better capable of 2k recording resolution, and worth your money..

Last Updated: June 09, 2017

Action Sports Camera Review

The era of an Action sports Camera bloomed over the years ranging from the cheapest to the expensive one in form of a
GO PRO HERO 5, every motorcycle enthusiast as well as seeking adventure trip. This one is a must. I have been motorcycling for many years now, and every journey i had been was just  all in my memory, nothing to share to all of my friends and readers.

The mentioned was incomparable to almost all available in the market today, but with some right practicality of how you will use the action camera, your probable option is to get a cheaper one with the right specification for the every journey you are into. The important thing is to have a clear footage of your trip and adventure that can be shared all over the social media.

WHAT ARE THE THINGS TO CONSIDER WHEN BUYING A CHEAP ACTION CAMERA ASIDE FROM WHAT I'VE MENTIONED ABOVE?

1.Chipset--Means which chipset we use to achieve the video recording function. All car camera or sports camera got the same main feature,the light is imaged on the image sensor via an optical lens. These image data is very large(a 5MP camera could produce 450M-900M data per second),these data must be compressed before they can be stored on the memory card,so chipset will do this job. Except data compressing, chipset is also responsible for correcting the image landscaping,making the image becomes clearer.Also providing other features like Wi-Fi, Bluetooth,Loop recording, burst, time lapse etc...

I'll name a few which is common on those cheap cameras of today
A. Ambarella
B. Novatek
C. Allwinner
D. Sunplus
E. GeneralPlus
F. Hisilicon
G. MTK

Right now, It is undeniable that Ambarella chipset used on action cameras are the far most expensive one, followed by NOVATEK, so on and so forth. When you see a camera spec with Ambarella, do not be surprise of the price of the unit. Go pro uses it, :)

Novatek on the other hand is catching up, Taiwan based chipset used by the known SJCAM on their carrier models such as SJ4000 and some mid priced not yet know brand as of today.

2, Imaging Sensor--The chip behind those lenses that act as the eye of the camera.
An image sensor is a solid-state device, the part of the camera's hardware that captures light and converts what you see through the 
LCD monitor into an image. If you seen a specification of a camera that states, Sony IMX078, or Panasonic MN34120A, or Aptina AR0330, OV2710, and etc. Those will determine the effective pixel of the camera.

3. GYRO or image stabilization function
--the function will remove the shakiness of the image when mounted on unstabilized platform. Some are actually software related, and some uses the electronically type with chip on their hardware.

4, Firmware Support--This is a must, Who wants to be stuck up on an ACTION camera without any means of improving the functionality of the software?. Even mobile phones from time to time needs to be updated for usability.

Other functions are almost optional, like external microphone capability, (not all action camera have this, other uses mods by opening the unit and attaching a jack for the external microphone). but there are units that already capable of this optional function.

LCD touch screen is also an optional to think about. 

Right now I am still waiting for my cheap action camera to arrived and make a full review of the functionality of every settings it has based on the specification. I will also do a tear down of what's inside. After all this site is for educational purposes only.

Stay tuned for my full review of my soon to be action camera. Note it is not a GO PRO HERO 5, They are already good from the name itself.




Last Updated: January 05, 2017

Koso Digital Speedometer for Yamaha Mio

It has been quite a long and tiring year that I have not visited this site, and been quite busy on making another information to be shared to all my readers. In lieu of 2017, hopefully everything will be an easy one for me, and so in behalf of the start of a new chapter. Happy New Year to everyone visiting mastercircuits.blogspot.com

This post is just a reminder to all who wishes to use Koso Digital Speedometer for Yamaha Mio as shown

The speedometer is a direct replacement to the original analog type speedometer when you buy a brand new Yamaha Mio sporty model. No special wiring or rewiring, a direct plug and play. Who will not love this kind of a beautiful creation made by Koso Taiwan.

But to some who do not actually know the difference between analog and digital when it comes to speedometer for motorcycles. Special attention on the condition of your  electrical is highly needed before wanting and trying to own the said speedometer. It is fragile if not taken care of properly.

Recently. I have been receiving units for repair from all over my country. The only cause that all of them broke down was battery related issues. A bit of CAUTION to those who are using it.

"DO NOT OPERATE YOUR MOTORCYCLE EQUIPPED WITH KOSO WITHOUT A HEALTHY BATTERY INSTALLED"

or

"NO LOOSE WIRING WITHIN THE ENTIRE POWER RAIL FROM BATTERY ALL THE WAY TO THE POWER CONNECTOR OF THE KOSO UNIT"

Battery acts as the entire voltage stabilizer for your electrical system. With any failure like fuse blown or loose contact connection or not properly bolted terminal. It will damage your unit.WHY?

Photo as shown came from one of the speedometer with on going repair.

The PCB traces was damage due to electrical issue and according to the owner of unit, It was loose battery connection and unsecured bolt on the terminal that causes voltage spike within the entire system.




As of the writing, the traces was gone both top and bottom side of the PCB. It is the trace that handles the power rail of the unit before reaching the step down converter circuit. It is probable that the drop converter which uses the Switchmode type was also damage.