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Circuit diagram of 220 V AC to 12 V DC Without voltage regulator IC, the diagram should be as simple as possible
The simplest 220 V AC to 12 V DC circuit is shown in the following figure (the output voltage of transformer secondary is 12 V or slightly higher, and the voltage stabilizing value of voltage stabilizing diode is 12.7 V)——
Urgent for a 12V DC to 220V AC circuit diagram
12V DC is provided by battery, the circuit requirement is not high, as long as it can boost to 220V AC
The production of DC regulated power supply, there are 220 V AC into 5 V 1A DC
Generally speaking, the coil turns ratio is equal to the port voltage ratio - as for the current, it depends on the cross-sectional area of the transformer chip and the coil thickness
The voltage of each end of the decorative color lamp is not allowed to exceed 12V. How many small color lamps should be connected in series at least to use the lighting circuit (220V) as the power supply?
N = -- ≈ 18.33 = 19
12v
∵ do not exceed the maximum voltage limit
Take 19
RELATED INFORMATIONS
- 1. In the 220 V lighting circuit, install the same color lamp, and the normal working voltage of each lamp is 13.5 v If a lamp is burned out, one is to give you an ammeter and a wire, and the other is to give you a voltmeter. How do two methods measure which lamp is broken?
- 2. How many kilowatts of electricity does a fan with voltage of 220 V ~ frequency of 50 Hz need to operate for 12 hours? Ceiling fan~
- 3. The capacitance of 10uF is connected with sinusoidal voltage with frequency of 50Hz and 5000Hz successively, and the effective value of voltage is 220V. The capacitive reactance and current of the capacitance in two cases are calculated
- 4. The resistance of the inductance coil of AC contactor is 220 ohm and the inductance is 10h. When it is connected to the AC power supply with voltage of 220 V and frequency of 50 Hz, how much current is in the coil? If the contactor is accidentally connected to the DC power supply with voltage of 220 V, how much current will be in the coil? If the allowed current of the coil is 0.1 A, will there be consequences?
- 5. Two bulbs marked "220 V, 40 W" are connected in series and then connected to 220 V power supply. The actual power consumption is? The answer, I know, is 20 watts,
- 6. Voltage of lighting circuit in China
- 7. Is it OK for a 100 watt 220 volt bulb and a 40 Watt 220 negative bulb to jump in the 380 negative circuit? Why Who knows why you can and why you can't tell me how to calculate it? Thank you here I know, but can I take it? You didn't say that. I don't know what to do
- 8. Connect 15 watt and 100 watt bulbs to the circuit respectively, and compare the speed of the meter dial rotation. What is the speed of the meter dial rotation?
- 9. The voltage of home circuit is () V, that of a dry battery is () V, and that of silver oxide battery for electronic watch is () V, which is safe for human body
- 10. What is the voltage of an ordinary dry battery? What is the voltage for human safety?
- 11. "When the voltage regulator is adjusted to 220 V, the power is 3 kW, and when the voltage is adjusted to lower, the power will be reduced along with it. (when the voltage is adjusted to 150 V, the power is 2 kW, and the power is adjusted to lower 110 V, the power is 1.5 kW." P=U*I=U*U/R=U2/R Power 3 kW at 220 V ------ 220 * 220 / 16 = 3025w When the power is reduced to 150V --- 150 * 150 / 16 = 1406w Reduce 110V power --- 110 * 110 / 16 = 757w It's different from what you calculated. Please advise
- 12. The total power is 3 kW, and the rated voltage is 220 V for any calculation of the current
- 13. Two lamps with rated voltage of 220 V and power of 100 and 25 W respectively are connected in series in 380 V circuit Calculate the voltage distribution results of the two ends of the bulb respectively
- 14. If a 40v200w arc lamp is to be connected to a 220V lighting circuit, the R of series resistance should be several ohm
- 15. A bulb is connected in series with resistance R. the known bulb specification is "220V 1000W", the battery voltage is 220V, and the resistance of resistance R is 6.6ohm. Calculate the actual power of the bulb
- 16. 6. A bulb marked with "220V 100W" with rated voltage of_____ The rated power is____ The current through the bulb during normal operation For____ The resistance of the filament is____ Oh.
- 17. A 220 V, 1000 W electric kettle works for 30 min, how many kWh and j are consumed?
- 18. There is an electric kettle with the specification of "220V 1000W". When the electric kettle works normally, what is the resistance of the internal heating wire? 1. How long does it take to boil 1kg water at 20 ℃ under rated voltage? (excluding heat loss) 2. If the actual heating time is 6min, what is the thermal efficiency of the electric kettle?
- 19. If a bulb is marked with "220 V 100 W" and B bulb is marked with "220 40 W", then: (1) the ratio of resistance when both a and B bulbs are normally emitting R A: R B=_______ The ratio of current passing through is I a: I b=________ , the ratio of power consumption P A: P=_________ . (2) Connect a and B bulbs in series and connect them in a 220 V circuit. The voltage ratio at both ends of the two bulbs is u a: u B=_________ The brighter one is____ Light bulb: (3) Connect the two bulbs A and B in parallel in a 220 V circuit, and the current ratio at both ends of the two bulbs is I a: I b=________ The brighter one is____ Light bulb:
- 20. One degree of electricity can supply five "220 V, 40 W" electric lamps for several hours Thank you. The final answer is five hours