echo ucfirst(strtolower($_SERVER['HTTP_HOST']));. gymnastics of devices
Simple The charger for li-ion accumulators.
The charger for charge li-ion of accumulators In rated voltage 7.4 volta. Light-emitting diodes d5 -
1, D5-2 Serve For indication Of a condition of the battery in the course of a charge. the red light-emitting diode signals about a battery charge (current course) and green the current less than 20-30 signals about the termination of a cycle of a charge. resistor r16 exposes the maximum pressure of a charge in a point of connection of diodes d5, d7. usually For two Consistently included elements it makes 8.4 volta. charger application means connection AccumulatorProtected by a payment of protection which is delivered usually by the supplier of batteries. the charge current is limited to size of resistance r9.
Charger dc-to-dc With pressure increase.
The device represents Itself small-sized economic Converter dc-to-dc With pressure increase. - Cellular Phones from standard elements of type or when dimensions of the device or other technical reasons do not allow to collect the battery of elements on the necessary pressure. the current in a secondary chain can be to 300-400 ma. the device efficiency is in limits of 80 % that is good indicator For similar Devices. it is necessary to pay attention that the device efficiency increases with difference reduction between entrance and target pressure.
The device is supposed To be used as before the beginning of manufacturing of the device it is necessary to calculate size of pressure in the end of a charge and size of a current of a charge. in : the size of target pressure pays off by a principle 1.45 in to increase by quantity of elements Accumulator. the size of a current of a charge is defined as 1/10 from battery capacity in /. such parametres are considered optimum, do not harm to the battery, give the chance to spend with Accumulator To 700 cycles (A charge - category) at preservation of their parametres in norms declared by manufacturers. truly at ambient temperature to 25 s.pri more high temperatures it is necessary to undertake certain measures For exception Of excess of temperature during a charge above 35
R4. D2 9 .
The charger with Protection from batteries.
For charge Small-sized Accumulators Of all kinds (Ni-Cd & Ni-Mh). distinctive features of the given scheme are: simplicity, protection from batteries, indication of a condition of a charge, observance of rules and technology of charge Accumulators, products demanded by manufacturers, the universality, giving the chance to make only one type of the printed-circuit board and selection of elements to achieve different values of sizes of target pressure and a current, high stability of target parametres. before the beginning of manufacturing of the device it is necessary to calculate size of pressure in the end of a charge and size of a current of a charge. in : the size of target pressure pays off by a principle 1.45 in to increase by quantity of elements Accumulator. the size of a current of a charge is defined as 1/10 from battery capacity in /. such parametres are considered as the optimum. truly at ambient temperature to 25 s.pri more high temperatures it is necessary to undertake certain measures For exception Of excess of temperature during a charge above 35 s.velichinu of demanded pressure of a charge establish selection of interlinear resistor r4. it is desirable, that the size of the maximum current did not exceed 600 ma. if the size of a current of a charge does not exceed 200 ma, there is no necessity for stabilizer u1 installation on a radiator. light-emitting diode d5 signals about presence of a current of a charge, light-emitting diode d7 about a charge of the battery and charger transition in a mode of maintenance of the minimum current of a charge - excluding the battery self-category. it is desirable after block transition in this mode to leave the battery in a charge in a current a pair of clocks - For guarantee Of reception of completely charged battery. The device of protection From is collected on transistors q3, q4. charge indication on transistors q2, q4. the transformer should be not less than 15 20 w, target pressure not less, than on 15-20 % more than settlement pressure of a charge. at existing face values, in the scheme the transformer on 30 volt is applied. as the variant is recommended to establish devices on the forward panel of the device: the ampermeter and the voltmeter, resistance r4 to put in this case variable type and to deduce also on the forward panel of the device. it will turn out universal compact device. the offered scheme of protection from can be applied in any other scheme of a source of a charge or the power unit, including in the pulse source of a charge offered on our site.