Hacked Gadgets Forum

November 14, 2015

Component Tester FISH 8840 Review

at 7:21 pm. Filed under Cool Gadgets, Electronic Hacks, Reviews



This is an inexpensive component tester called the FISH 8840 which you can find from many online eBay retailers for around $30. The interface is very simple, attach a device to be tested and press the test button. It turns off after about 20 seconds, pressing the off button puts it into sleep mode immediately. There is a ZIF socket that allows you to insert leaded devices and pads that allow you to press SMD devices directly onto the tester. Their are number 1 through 3 on the tester where you connect the device under test to and then the screen will display the recognized component with the lead numbers on a component schematic picture. There seems to be an issue with the capacitor testing mode with a range of values, I will discuss this with the seller to see what the resolution to this is. I have seen this tester work fine with capacitors so I think it is just something with this one. You can see the features and functions below.


“NEW Function:
1:Automatic detection of NPN and PNP transistors, n-channel and p-channel MOSFET, diode (including double diode), thyristor, transistor, resistor and capacitor and other components
2: Automatic test the pin of a component, and display on the LCD
3:Can detect the transistor, MOSFET protection diode amplification coefficient and the base to determine the emitter transistor forward biased voltage
4: Measure the gate and gate capacitance of the MOSFET threshold voltage
5:Use 12864 liquid crystal display with green backlight
Specifications: For you reference
1 two -button operation, automatic shutdown .
2,Only 20nA shutdown current.
3,Automatically detect NPN, PNP bipolar transistors , N -channel and P -channel MOS FET, JFET , diodes , two diodes, thyristors small power unidirectional and bidirectional thyristor.
4,Automatic identification components pin arrangement .
5,Measuring bipolar transistor current amplification factor and base – emitter threshold voltage.
6,Via the base – emitter threshold voltage and high current amplification factor to identify Darlington transistors.
7,Can detect bipolar transistors and MOS transistors protection diodes.
8,Measuring the gate MOS FET threshold voltage and the gate capacitance.
9,Can simultaneously measure two resistors and resistor symbol is displayed. Displayed on the right with a decimal value of 4 . Resistance symbol on both sides shows the pin number. So you can measure the potentiometer. If the potentiometer wiper is not transferred to an extreme position , we can distinguish the middle and both ends of the pin.
10,Resistance measurement resolution is 0.1 ohms , 50M ohms can be measured .
11,Can measure capacitanceCan measure capacitance of 30pF-100mF , resolution 1pF.
12.2uF more capacitors can simultaneously measure the equivalent series resistance ESR values. The two can be displayed with a decimal value , resolution 0.01 ohms.
13,Can be in the correct order and the diode symbol display two diodes , and gives the diode forward voltage.
14.LED is detected as a diode forward voltage higher . Combo of the LED is identified as two diodes.
15,Eeverse breakdown voltage is less than 4.5V Zener diode can be identified.
16,Can measure a single diode reverse capacitance. If the bipolar transistor connected to the base and collector or emitter of a pin , it can measure the collector or emitter junction reverse capacitance .
18 can be obtained with a single measurement rectifier bridge connection.
Notice: Before measuring capacitance , the capacitor must be discharged , otherwise very likely damage the meter .”




November 27, 2014

Syma X5C-1 Quadcopter Review and Teardown

at 5:27 am. Filed under Cool Gadgets, Reviews

 Syma X5C Remote Quadcopter Teardown_8736


Thanks to Gear Best for sending in a Syma X5C Remote Quadcopter for us to take apart and review. Use the coupon code below to get a special Hacked Gadgets price for this unit. This is the first quadcopter I have looked at so I am no expert. Unfortunately the weather conditions in Winnipeg are not the best for doing any outdoor flying so the most we could do is a basic buzz around the livingroom. This thing can get some great altitude and seems to take some good video when in daylight. The few pictures I took were in the livingroom in a low light conditions.

The first video goes over what is in the box and a short indoor flight. The second video shows us what makes the magic happen. If you want to see what it can do outdoors (can’t wait till summer) have a look at the video that Quadcopter 101 made here.


Get the Syma X5C-1  6 Axis Gyro Quadcopter now for $49.99 using the code below.

Coupon Code: GBX5CCN


You can see the full sized images here.

The three main chips on the control board are:

Processor : NUVOTON MINI 54ZAN

Wireless : BEKEN BK2423

Stability : INVENSENSE MPU 6050C





November 4, 2014

30 BeagleBone Black Projects book Review

at 2:19 pm. Filed under Reviews

30 BeagleBone Black Projects book Review


If you are new into the world of BeagleBone Black this book will walk you through getting you started and building some interesting projects that you can easily build upon. The book is well documented and explains what the code is doing step by step. It is available at most book stores and many places online such as Amaon and Indego.

“This wickedly inventive guide shows you how to program and build fun and fascinating projects with the BeagleBone Black. You’ll learn how to connect the BeagleBone Black to your computer and program it, quickly mastering BoneScript and other programming tools so you can get started right away. 30 BeagleBone Black Projects for the Evil Genius is filled with a wide variety of do-it-yourself LED, sensor, robotics, display, audio, and spy gadgets. You’ll also get tips and techniques that will help you design your own ingenious devices.

  • Features step-by-step instructions and helpful illustrations
  • Provides full schematic and breadboard layout diagrams for the projects
  • Includes detailed programming code
  • Removes the frustration factor—all required parts are listed along with sources”


September 2, 2014

Black and Decker 2 Slice Toaster T2707SKT Repair and Teardown

at 10:32 pm. Filed under Reviews, Teardown

 Black and Decker 2 Slice Toaster T2707SKT Repair and Teardown_8252


This time we will be taking a look at a Black and Decker model T2707SKT Toaster. Not that I was looking for a toaster to teardown but I just happened to stumble across it at my local XS Cargo store. It was a factory reconditioned unit that was then returned. The issue listed on the ticket was that one side didn’t heat properly. The regular price was around $30 or so and it was sitting on the discount shelf for $2. I figured it would make for a good teardown and possibly repair video.

Turns out the design of the toaster is both quite simple and more complex than I would have expected. Let me explain… The actual electrical design of the basic toaster is very simply. There is a large plastic plunger that is connected to the handle that gets pressed down by the user to push the toast down. When pressed there are 2 contacts that are made which transfers the electrical connection from both neutral and hot AC lines to the heating elements. The heating elements consist of one circuit for the outer heating and one for inner heating. Turns out that the inner one was working and the outer one was not.

There is an electromagnet that is used to hold the spring loaded mechanism in the depressed (toasting) position and when de-energized the toast pops up and automatically kills the power to the entire circuit.

There is not much in the way of protection in this device, the chassis is not grounded like many other devices like this. This means that if there is a stray connection from one of the heating lines to an internal metal component the case could be energized. The construction is quite well designed to prevent this though. I would have felt safer if there was a ground connection to the exposed metal housing though. There is also no over temperature sensors that could be seen in this device. Most high wattage devices that generate lots of heat have an internal in line heat sensor that opens at a pre-determined temperature to prevent an over heating issue from becoming dangerous. For example if something accidentally jammed the toaster in the depressed position it would eventually reach a temperature to turn off. I guess with this design the actual heating wires might fail after a short enough time to prevent any dangerous conditions.

The control board is powered in an interesting way. The heating coil for the internal section is tapped at around 12 volts to power the control board, this prevents them needing to design a circuit that first needs to reduce the 110V AC to a usable voltage. The only method of control that the control board has is to energize and de-energize the electromagnet that holds the toast tray down. There is no temperature feedback and the only output that the controller can provide is how long the heat is on. There is a large temperature dial and 4 push buttons but in the end all these do is vary the on time blindly. For some reason I felt that there was going to be some additional smarts in place here. **UPDATE** Alex left a comment about the control chip. I didn’t take a second look at it, I figured it would have been some type of generic timer chip. Was I ever wrong, the chip is a Holtek HT46R005 which is a microcontroller!

Turns out that one of the connections between the heating element and crimp connection was where it failed. This is a failure that can’t be repaired since this connection can’t be soldered due to the natural high temperatures of the connection. It would need to be spot welded or crimped. I don’t have a spot welding machine and there is no room to re-crimp so I simply temporarily twisted a binding wire around the broken connection using some light gauge solid copper wire to allow the system to be tested before it was thrown out.

During the teardown of the unit it was noticed that the AC power cord was squished quite badly in the strain relief clamp. This clamp is a simple piece of plastic that is held in place over a notch in the molded plastic base by 2 screws. I am not sure if this is an isolated incident where the cord is damaged to this extent by being held in place or if this is how most of the cables look after being squished in place. You can see some pictures of this below.

Unfortunately there isn’t much in this unit that can be scavenged. The electromagnet and timer board is the only thing that is of any interest.

Hi resolution pictures can be found here.



You can see the damaged cord below, this was damaged by the strain relief clamp! See additional pictures of the damage in the picture gallery below.

 Black and Decker 2 Slice Toaster T2707SKT Repair and Teardown_8305  Black and Decker 2 Slice Toaster T2707SKT Repair and Teardown_8302



September 1, 2014

Zetta Z12 Spy Camera Review

at 7:58 pm. Filed under Reviews

Zetta Z12 Spy Camera Review_8254


Thanks to Spy Tec for sending the Zetta Z12 Spy Camera in for review. The unit is nice and small, the battery is designed to last long enough to catch the video you need. There are lots of uses for this device, if you have someone that is borrowing your morning paper or leaving your doggy presents on your lawn you can hide this little device to catch the action you need. Unlike a normal security camera you can set it up to just record when there is some activity to be recorded. There is a ton of other activation modes to help you record what you need. To see it in action watch the video below.

Pictures of the device are below, if you would like to see them in full size you can grab those here.




Storage temperature 0 to 45degC (32 to 113degF)
Operating temperature 0 to 45degC (32 to 113degF)
Size 7.6 x 4.3 x 1.9 cm
Battery 800mAh 3.7V Li-ion battery
5V Adapter 5V, 600mA DC adapter with mini USB out
Car Adapter 12-24V input, 5V, 750mA car adapter, USB out
Current consumption 80mA
Recording time max 8 hours (with fully charged battery)
Standby time max 90 days (in vibration triggering power saving mode with fully charged battery)
Sensor resolution VGA (640×480)
Sensor sensitivity 6.8V/lux-sec
Sensor viewing angle 62deg
Microphone speech grade
Memory card supported max 64GB microSD card (TF)
Memory usage 45 minute/GB (high frame rate)
3 hour/GB (low frame rate)
Video recording resolution VGA (640×480) or QVGA (320×240)
Video compression JPEG
Voice recording 12kSps, 8bit
Voice compression PCM
File format AVI
USB Mass storage device
OS supported Windows 2000 / XP / Vista / 7 / 8, Mac OS X




August 28, 2014

Creative Sound Blaster Roar Review

at 4:17 am. Filed under Cool Gadgets, Reviews

 Creative Sound Blaster Roar Review


Thanks to Creative for sending in the Sound Blaster Roar for review. Right out of the box the quality of construction is evident. The feel of the buttons and switches is top notch, it should provide years of trouble free use. It is easy to pair it to your bluetooth compatible phone and get your tunes cranking on the Roar. If you don’t want to play music through your phone you can select one of the many other methods of playback. Pop in a micro SD card with some music will allow you to keep it standalone and play all of your favorite music. If you have a device that just has a headphone jack out like an old iPod that will work using the Aux in jack. The micro USB port can be used to play music from your computer.

The system has 3 active drivers, one is a long through woofer for surprisingly deep base. There are also 2 forward facing speakers for right and left audio, 2 additional passive radiating drivers fire music out of the side grills.

If you have a cell phone that needs a quick charge you can plug it into the full size USB port. The port has a 1 amp rating so it will also charge most tablets.

Need a conference room speaker? The Roar actually does a good job of transmitting the sound from your cell phone to the speaker and transmits the room audio using the built in room mic. The system is obviously doing a good job of canceling out the sound that it is producing in this mode since there is no feedback.

If you are feeling a bit uneasy in your surroundings you can arm the alarm and press the siren button to grab the attention of everyone around.


The Good

  • Great sound quality and bass
  • Build quality is fantastic
  • Feel of the controls is very good
  • Battery life is good at around 8 hours
  • Good range on the built in bluetooth receiver
  • Built in NFC for easy paring with new devices
  • Flexible methods of music connectivity
  • Conference room speakerphone that works well
  • Aux USB charging capability
  • Easy to switch privacy modes to share access to the device


The Bad

  • The rear controls are cumbersome to access without flipping the device on end, this could scratch the front of the system
  • Although the micro SD card allows tons of music storage capability it is not possible to select a playlist or specific song to be played. A cell phone app would be a great addition to allow control over the SD card audio
  • The case makes it hard to read the button labels
  • Battery is not user replaceable


You can see that there are good and bad qualities to this device. That being said the good far outweigh the bad. If you are looking for a kick ass portable audio player to fill a room with booming sound this device is for you!



Creative Sound Blaster Roar Review_4


Creative Sound Blaster Roar Review_2


Creative Sound Blaster Roar Review_3

August 27, 2014

Opus BT-C3100 V2.0 Intelligent Battery Charger Review and Teardown

at 1:05 am. Filed under Reviews

Opus BT-C3100 V2.0 Intelligent Battery Charger Review and Teardown_8214 


Thanks to GearBest for sending in this Opus BT-C3100 V2.0 Intelligent Battery Charger for review. at a quick glance this charger might look like any other charger that you see at the grocery store.  Your generic store bought brand probably also has 4 charging bays for AA and AAA batteries, it probably has 2 charging circuits which places 2 cells in series to charge them, it most likely has 2 charging lights which just turns off when charging is done. If you leave the batteries in your generic charger you will most likely have batteries that have been overcharging or running down. Also your generic charger can probably just charge one chemistry of battery.

When you have a closer look at the Opus BT-C3100 V2.0 Intelligent Battery Charger you can see how this system differs from your every day generic battery charger. It can auto detect and charge NiCd, NiMH and Li-ion batteries. It charges each cell independently preventing bad cells from interfering from other cells from charging properly. Forget charging lights, this has a full LCD display that provides tons of status. It will monitor batteries that are left in the charger and keep them topped up and ready to go. From here the features go on and on. Don’t let the small package fool you, there is a ton of smarts and features built into this small package.

Have a look at the pictures below and in the video for a look inside the charger. The construction is a dual sided SMD load, the construction looks very professional. The battery contact spring tensioners work well and the connection to the PCB has been beefed up with a thick metal bar. The heat management in the unit is great, there are no hot spots when operating and if there was a problem one of the 6 thermal sensors would be sure to catch it. The processing and display is done using a chip on board which can be seen under the epoxy blob in the pictures. 

The case is well built and feels nice in the hand, the buttons and battery sliders feel like they will last. The plug in power supply came with an adapter which changed it from a European plug to a North American style but this caused the plug stack to be quite long and might cause a problem if it was to be plugged into a wall plug. I was using a bench mounted power supply so I didn’t have any issues but this could be a concern.

The price of this unit is a bit higher than your grocery store version but don’t be fooled, this unit is worth it.  Best of all GearBest is offering all Hacked Gadgets readers an 8% discount using the coupon code Anna08.



There is a fantastic display screen on this unit. The LCD screen is backlit when you are pressing buttons and is clear and easy to read. The screen is divided into 4 equal sections, one for each battery in the unit.The upper unit of the display tells you what function is being performed, the lower section is for data such as cell voltage, charging current, discharge current, etc.


Cell Selection

You can use the slot button to select each of the 4 battery bays to adjust what operation is to be performed on that bay. This adds flexibility since now you can perform any task you like in any of the positions. For example you could charge cell 1 at 500mA, charge cell 2 at 1A, discharge cell 3 to put it into storage and do a discharge refresh on cell 4. You can also easily opt to perform the same function on all slots with the press of a button.



In charge mode you simply pop in a battery, you will be shown the initial battery voltage before the charge starts. You can then select the current you wish to charge the cell at.

In Discharge mode you can discharge the inserted battery to a preset level. You will also be shown how many energy was discharged from the cell after the discharge is done. It is then trickle charged to prevent it discharging any further.

In Refresh mode the charger will discharge and charge the battery 3 times to allow old batteries that have not been used in a long time to restore some of their capacity. After the 3 cycles are complete you will be able to see the total mAH of the cell. This lets you track the health of the battery over time if you like.

Test mode checks the capacity of the battery by immediately discharging the battery after it is charged.

Quick Test allows for a check of the internal resistance of the battery. This test is quick (under 10 seconds) and will show you if the battery is a good contender for high current applications. You can test batteries with other chemistries using this function such as alkaline and any other 1.5 volt battery.


To see the full size hi-res pictures please click here.



Opus BT-C3100 V2.0 Intelligent Battery Charger Review and Teardown_8186



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