Intex Power Bank 6000mAh (IT-PB602) Technical Review

Pros :-
1.Two USB Ports, supports simultaneous charging.
2.Elegant Design
3.High Efficiency
4.Stops after full charging/No over charging.
5.Auto power off on no load or very light load.
6.Clearly visible LED indicators

Cons :-
1.Made of Plastic, may not sustain fall from 1 meter.
2.Very Short USB cable. ~30cm (only one attachment is provided)
3.Its only charging cable (not data cable/can’t be used for transferring files from pc)

Technical Review :-
I have been using it for a month now. It charges my 1700mAh(Moto Defy + )3 times from full discharge to full charge.

During charging the front LED lights blinks in a sequential order. (for Ex.-if its been 60% charged, it shows 2 countinous glowing LED and 3rd one blinking)
It stops charging or disconnects the battery completely after reaching full charge (4.18V, tested by Multimeter)
So no worry of overcharging even if you let it plugged overnight.

During Standby it gives nearly 1.3V to o/p, and as soon as it is connected to a device/mobile it detects it and turns on to give 5V o/p, LED glows countinously as per the charge left in the power bank.

If the load current is too low <20mA for 1A port and <50mA for 2A port the bank turns off supply on USB ports. So it turns off supply when the phone is full charged. So no worry of overcharging on phones also. ( I have tested it with 1 led usb lamp I have which turns off after some time when placed in 2A port, but glows in 1A port)

Battery resting voltage after full discharge is 3.4V, which is perfectly fine, does not over discharges as in cheap power banks.

Internal circuitry contains a microcontroller which perfectly manages battery for long life. If battery qulity will be good then it will go for more than 3 yrs or >500 cycles.

Standard Cylindrical Li-ion cell (18650, same as in laptops) has been used.

LED torch provided is just OK. not too bright nor too dim. (3mm white LED, ~25mA). You can run it for 10 Days countinously in one single charge.
LED gets a bit dim after 1 one min from starting. Initially it runs from 5V supply from USB ports, and a fixed USB power turns off and LED countinous to glow on direct battery Voltage ~4V.

There is no use of power button other than to see remaining power and torch.

I opened the device to see whats inside (there is no seal, so no warranty violation), and I was amazed to see the quality product intex has delivered. I bought it in INR 850/- . I will suggest to go for it, although it is a bit overpriced. Also do not compare weight on power banks as they all use same battery models(li-ion 18650)

Some reviewers have said that the front LEDs are too bright which drains battery. Technically this is not true, thats the same SMD leds used by all power banks .Its only that they have made the LEDs more visible by giving a bigger window and more transparancy.

PIC 8-bit Popular Microcontroller Specifications

Here are some of the PIC 8 bit uC datasheet technical specifications.
They are taken from Microchip datasheet of the respective uC.

CD/DVD Drive Motor Driver hack to run its own 3 phase BLDC motor

You can use your old CD Drive motor to run it as fan or for any other motor applications, simply by 'Hacking' its own motor driver which is on the board of the CD Drive .

You simply need to download the datasheet of the motor driver IC which is on your board (as it varies) by Googling it around.(If available on the net).
Generally motor driver IC has a small heat sink on the IC itself (something like silver colored plate or solder on it). You can distinguish from other IC's that way.

I found mine.My motor driver IC was MP63028FP.




Find the current control or speed control pin of the motor driver through datasheet.
And as per the IC requirement (by looking datasheet) provide it analog voltage with the help of potentiometer/rheostat/preset.

In my case it was pin 26 ( i.e. spindle control voltage input).
I provided it a voltage ranging from 0 to 5V through a 100k preset.
Actually, I overrided the I/P coming from other control IC of the board to the motor driver by simply sodering the o/p coming from preset to that pin.

Also,I have added a small heat sink on the driver IC by simply making a hole on the heat sink and then putting the hole on the rectangular heat sink area provided on the top of the IC ,then I poured some solder.
You will not require to add a heat sink if you run it at low speed/current (<0.5A).

Provide the power supply to the board as per requirement. (i.e. 12V, 5V, GND).
You can provide the power supply through 12V source and voltage regulator IC 7805 to get 5V supply for it.
I am using variable voltage regultor IC LM317.

Thats all, you have done it.

As you increase the voltage value your motor will start running as per the preset value.

Now I am using it as a small 12V DC powered table fan by attaching a self made blade to it.

Comment if you like to know something else about this.