1, V reference precision reference voltage can be used μA431 high-precision voltage regulator, about the problem of obtaining positive and negative power supply Positive and negative power supply chip , give you a figure for reference.
2, 5V after voltage regulation to get 5V, you can choose TL431 chip. -5V voltage can choose ICL7660 coreThe NE555 chip can also be simply used to generate vibration, add inductance to reverse phase, and then regulate the voltage after rectification and filtering.
3, in fact, the general LVTTL 232 chip is compatible with 5V voltage, so in the case of low requirements, it can be directly connected. 232 can accept a voltage of 5V. Similarly, the 5V MCU receives the 232 level of 5V, which can also distinguish the high and low levels, because according to the TTL level specification, as long as the level reaches 0V (should be this value, can not remember), it can be judged as high.
4, there are 5V to 5VThe input and output of the DC converter module are isolated by the internal switching transformer, and two pieces can be used to make a double 5V independent power supply, or there may be a 5V model with a double 5V.
5, search a treasure 5v charger how to change 5v charger positive and negative power chip ? The material should be simple and easy to find: go to a website and search. Variety of everything, choose non-polar voltage control OK.
6, is to be used for power or signal? The max232 converts 0 and 5v signals into -12v and 12v signalsHow to achieve positive and negative 5v dual power supply, say what chip is needed, but also circuit diagram _ Baidu... '> How to achieve positive and negative 5v dual power supply with 5v power supply, say what chip is needed, but also circuit diagram _ Baidu...
1, ha ha just made a, stable performance. See if I can help you. I've already used it on my products. Positive power supply also uses LM2576 schematic diagram many on the Internet ship a good.
2, you can also use 555 circuit connected to a -5V voltage generator. As shown in the attached picture.
3. Yes. Double fivesIf the V power supply is connected in series to 10V, the two nodes are used as the ground (GND), so that the positive pole of 10V after series is equivalent to the ground (GND) is 5V; The negative terminal (-) of 10V corresponds to the ground (GND), which is -5V.
4, you take 5 resistors, the ratio is 5:5:5:2:2 for example 500 euros, 500 euros, 250 euros, 200 euros, 200 euros in this order A.12V B.500 C.500 D.250 E. ND connected to 12V in series, using point C as your reference point, then point AIt's 5V, and the D point is -5V, so if you want 5V, you connect two 200 ohm strings and you crush them at 5V.
5, according to the MC34063 DATASHEET circuit, has been used for several years. This is part of the actual product schematic.
6, there are 5V to 5V DC converter module input and output is isolated by the internal switching transformer, with two can be made into double 5V independent power supply, there may be 5V to double 5V model with a piece on the line.
This is not the voltage reverse transformation of DC-DC converter, universal switching power supply chip can be done, such as MC34063, UC3842, TL494 and so on.
Chip LA7840 single power supply voltage 25-28V, positive and negative power supply voltage 16V, -15V.LA7840 is a field deflection output integrated circuit produced by Sanyo Company. LA78040 LA7840 LA7841 is interchangeable. The supply voltage is 25-28V.
The specific connection mode can be determined according to the function of the chip and the requirements of the circuit diagram. Generally speaking, the connection mode needs to consider the following aspects: The power connection chip needs to be connected to positive and negative power supplies, generally VCC and GND. If the power connection is not correct, the chip will not work properly. The input and output ends of the chip need to be connected to other devices. The connection mode can be determined by checking the chip manual.
2, their own conversion of positive and negative voltage is more troublesome, you can search such a module, a lot of.
3, lm358 is a low power dual operational amplifier, wide power supply voltage range chip, single power supply 3V-30V DC power supply voltage, doublePower supply plus or minus 5V - Plus or minus 15V DC power supply voltage. The lm1458 is a general-purpose dual operational amplifier, which uses both positive and negative power supplies, and the maximum power supply voltage is plus or minus 18V.
4, short circuit current limit Low static current output switch current up to 5A (no external triode) Output voltage adjustable working oscillation frequency from 100HZ to 100KHZ. As long as the IC is connected with a small number of external components, it can realize the power supply boost, buck, reverse polarity output. You can convert 5V to -5V by connecting the IC to a -5V voltage generator. You can also use 555The circuit is connected to a -5V voltage generator. As shown in the attached picture.
5, there is a power conversion chip ICL7660, with ICL7660 to convert positive 5V into -5V. I get positive 5V converted to positive and negative 5V. The power of -5V should be large, the electronic market has DC/DC voltage module, you choose according to the power demand, the positive 5V into -5V.
1, -5V voltage because the current requirement is not large, can choose ICL7660 chip, simple can also use NE555 chip to produce oscillation, add inductance reverse, rectifier filter and then voltage regulation.
2, if you do not need to change the voltage, directly cut the data line, the white line and the green line are discarded, the red line is positive, the black line is negative (tinned bare copper wire is also negative), then you get five volts voltage, if you need to change the voltage, you can use dc-dc power module, boost voltage, buck voltage can be.
3, V reference precision reference voltage can be μA431 High-precision voltage regulator, about the problem of obtaining positive and negative power supplies, give you a figure for reference.
4, there is a power conversion chip ICL7660, with ICL7660 to convert positive 5V into -5V. I get positive 5V converted to positive and negative 5V. The power of -5V should be large, the electronic market has DC/DC voltage module, you choose according to the power demand, the positive 5V into -5V.