The voltage limit of 4.1V works quite https://jiji.ng/296-shower-parts/standing accurately, the cutoff the current is not very good – due to the parasitic power supply of the microcircuit through the resistance of the heater winding, the mode indication is not at all as indicated in the description.
As a rule, they can be easily disassembled using a conventional
knife. I expected the IC to be a conventional programmable microcontroller, but this
a specially designed custom product – the microcontroller will not be able to directly control a heater with a current consumption in the region of one and a half amperes. The DZ in them looks something like this: The board contains a microcircuit in the SOT23-5 package, a 0.1 uF capacitor and an LED.
First of all, the device must be disassembled, and then with a ballpoint pen, remove the plastic stopper that serves as a mouthpiece. However, now we have another source of components – disposable electronic cigarettes. Motorola C155 uses the ISL6292C charge controller. On reflection, we come to the conclusion that there is only one option:
If pouring liquid into the evaporator is easy, then about charging the battery on the Internet, you can see something like this bad advice: ■ When the switch normally operates, if there is a short circuit (that is, the output impedance is less than 1 ohm), the short circuit protection is carried out. Scheme of the ECO: Apparently, this is due to the fact that in a particular copy of the remote sensing, a microcircuit was used that differs from the description. 2.
Stuffing without a body and other extra parts: At first glance, the DZ looks just like a microphone, so some are frightened when they find a discarded OES in the entrance and consider it a KGB bug:
OES is a product, although not as disposable as an anti-aircraft projectile radio fuse, but about the same mass and much cheaper, so the control electronics here are extremely simplified. It is difficult to solder without a hot air gun, the case is small, there are quite a lot of conclusions, it is unrealistic to display the indicator LED.
Connect the laboratory power supply, check:
We will borrow the charging connector from the board of the mobile phone that has become unusable: Because there are different working modes, and the system has different working states in each mode, the system plan provides a visualized LED learning function, which allows customers to clarify the working state of the system during use。Therefore, depending on the different application states, there are Various LED instructions for chip startup, smoking time, voltage detection, short circuit protection and charging process.
Solder the wires from the power connector to the remote sensing:
There is no output to the indicator LED, but you can use crutches: < /p>
So, let’s study the materiel. You will see a battery with soldered contacts. When the voltage is less than 3.1V, the LED flashes 10 times and the output ends。
Samsung X450 – uses LTC4058. ■ When the system calls, the LED flashes three times and then immediately enters the provincial power mode
The ideal option is the LTC4054 chip, also known as LTH7 or LTADY:
Why "at least"? Because there are ECOs for 3000 puffs, which regularly provide for recharging the battery, because throwing away a 2000 mAh battery after one use is still too much.
Oddly enough, I could not find a sane datasheet for the microcircuit (by the way, I came across at least three different types), so I had to be content with fragmentary information:
Let’s cut it out with a piece of textolite and fit it to the bottom cover of the ECO in place:
It requires a minimum of external elements and can be easily transplanted to a new place: – two insulating gaskets;
It differs from a real microphone in that it fits at least three wires, and an LED soldered on the SMD board: If the light bulb is soldered, then you need to push out the "insides" of the device from the side where the wick is located.
About free CC/CV chargers for lithium. Next, you will need to take the charger from the phone, to which you need to connect the wires so that the polarity is observed (black is “-”, and red is “”). Actually, directly charging lithium batteries from USB is not a good idea. The plan is as follows:
Printed circuit board close-up: Then you should remove the LED cover, which is located on the opposite side of the electronic cigarette. The case is small, but there is a status indication contact on the board: – cut off at the opening of the rim of the case. Already there, by definition, the correct charging mode of the power source must be observed and all the necessary protections must be available.
Solder the power wires (no need to make long ones) : LED Operating Instructions
The user of such a product should suck just not like a child, and there are relatively few of them, so homemade people usually have to be content with a simpler DZ.
Saw through the groove for the connector in the metal case of the ECO: Where the light bulb is usually "", and where the wick is located "-". — inner cover; C Motorola and Samsung in this regard is somewhat easier. In fact, everything is not so simple. Inside the body there is an evaporator with a supply of liquid, a lithium battery and a puff sensor: So, the charging function is also here, but how to get to it? In order to charge the device, you need to turn on the power supply for about half an hour.
1. — printed circuit board; ■ In the case of a normal switch trigger (ie smoking), the LED will gradually glow and die out; The situation is similar with push-button Nokia and Siemens. The length of the LED is two seconds, and the output is closed; Well, oh.
Conclusions: ■ Perform voltage test before load output current. Next, you will see a wick, and then it will need to be soaked with liquid, that is, refill the device.
It can be obtained from the board of an old inkjet printer:
Samsung R200 – Uses LTC1734. It happens that this cover is soldered to the LED, that is, it is one with it together, then you need to act like this: using the rod, you need to push the contents of the electronics out of the case from the side where the LED is located.
It is pointless to pick Android smartphones – they have an integrated power controller in a large BGA chip. ■ When the internal control switch is triggered for more than 5 seconds, the LED flashes twice in succession and the output ends; The disposable electronic cigarette charge sensor can be successfully used as a lithium battery charge controller.
But, alas, it is much less common than we would like.
Assembled – modified and original product: To fix this, let’s introduce a 2-3A Schottky diode into the circuit to break the heater power supply circuit:
The insides of the ECO before packing back into the case: Without its disassembly, this cannot be known, and its design does not provide for disassembly without damage. So, let’s take sharp-nosed wire cutters and open the DZ like a tin can: Pretty handy solderable SOT23-6 package, but requires an external power transistor:
From left to right: Us
managed to successfully deceive the system, and now a disposable cigarette can be reused, which is important during Hacking a disposable e-cigarette
It would seem that the most affordable free source of lithium battery charge modules is an end-of-life cell phone. – case with protective mesh; ■当系统充电时，LED会长亮，充满电后(VDD>4.1V) LED自动熄灭；