274 Threads found on edaboard.com: 220v To 5v
I'm pleased to joining you. I mean this forum.
Well, I have a question NOW!
How can i convert 220v AC to 5V AC. I need that for synchronise purpose.
Any one may upload a circuit.! Please ..
Power Electronics :: 28.03.2010 14:45 :: Eng.AH :: Replies: 6 :: Views: 2896
Can i down the AC voltage from 220v to 10 volt without transformer,
Is there any device make this function?
thanks in advance.
Electronic Elementary Questions :: 29.01.2012 15:54 :: hossam abdo :: Replies: 8 :: Views: 856
i have 6V AC and i want 5V AC . plz tell me the circuit for taking 5V ac at output and input is 6V ac. i m giving this 5V Ac to an analog to digital conerter circuit .
i m taking 6V AC from 220v to 6V transformer. so plz tell me that how I got 5V ac for an ADC input so that the current is as much as ADC need
Electronic Elementary Questions :: 06.08.2005 16:29 :: quris_terris :: Replies: 4 :: Views: 827
I need some help, I need a capasitive circuit that converts 220v AC -to- 5V DC .
Can you help me finding this? Or can you give me an idea to construct the circuit?
Thanks a lot..
Electronic Elementary Questions :: 22.08.2005 09:16 :: amun :: Replies: 2 :: Views: 1057
any have a schematic for 220v to 5V 1A supply using simple smps?
You could use a transformer to get AC 6~10V,and then rectify it with diodes and RC circuits.
PLs refer to a primary electronic book.
PC Programming and Interfacing :: 23.09.2008 09:14 :: wingwind :: Replies: 9 :: Views: 10952
How we can convert 220vAC to 5VDC at about 100mA without transformer ,is there any IC for doing this task?
Analog Circuit Design :: 11.02.2008 18:16 :: 7rots51 :: Replies: 12 :: Views: 21242
Can anyone tell me how does the following circuit work?
i've used it in a project's power supply to convert 220v AC to 5V DC for use 5V DC to ATmega16 and servo motors ,
(ATmega16 and a servo are connected parallel) ; will the parallel connection
Power Electronics :: 24.06.2012 17:04 :: Nusrat Mary :: Replies: 3 :: Views: 498
I want to design a 220v 50Hz AC to 5V AC current is around 5mA~10mA PCB planner Transformer.
The efficiency is just more than 10%, that is enough.
Here is the question ?
1 Can I design it? Did anyone design this? Because the winding N is around 45:1. I think it will be not easy, but my current need is very small.
2 How Big it will b
PCB Routing Schematic Layout software and Simulation :: 14.01.2013 09:23 :: 6716914 :: Replies: 2 :: Views: 206
I don't trust 220v 50 hz triac/resistor to common DC elektronic/Processor.
If I where you use the optoswitch, to isolate AC/DC!!!
Thats just mine opinion. I'm sure there is another way.
But I think this way is simple and secure!!!!
That's just my words..
Professional Hardware and Electronics Design :: 25.07.2002 20:27 :: bone :: Replies: 11 :: Views: 1960
Hi everyone I am doing a system including a motor and I am using 220v AC relays and AY89C52 to control the system.
Everything was going fine until I connected the microcontroller circuit with the relays as when the relays are switched on or off they reset the microcontroller circiut.
Microcontrollers :: 21.02.2004 22:06 :: emmos :: Replies: 11 :: Views: 5744
now we have a 0 to 220v peak-to-peak for the oscilloscope..... can you give me some advise and schematic for attenuator ckt. to reduce the input-siganl by 100
Electronic Elementary Questions :: 03.08.2005 22:21 :: pjames_e :: Replies: 13 :: Views: 921
i m using ADC 0804. plz tell me the circuit for connecting AC voltage to ADC input. further more i have 220/5V transformer. can i connect transformer output (5V) to ADC input. At 220v frequency is 50 hz. i m step downing 220v Ac to 5V AC using transformer. can transformer output (5v ac) be applied to ADC input means is there any problem in step do
Electronic Elementary Questions :: 08.08.2005 07:52 :: quris_terris :: Replies: 2 :: Views: 1593
I think it does not matter whether conversion from AC to DC.
The exact thing that I need is a capacitive- resistive circuit which converts 220v to 5V. Please help me..
Electronic Elementary Questions :: 22.08.2005 09:33 :: amun :: Replies: 4 :: Views: 787
I want to design a PIC based Digital Voltmeter which can measure ac voltage upto 220v. Any circuit ideas then plz tell.
Microcontrollers :: 21.09.2005 10:13 :: dani :: Replies: 6 :: Views: 5097
Would you tell me which eda tools I can use to design a flyback converter IC(~220v to 5V/3A)? Any advise for me? How to deal with the transformer?
Analog Circuit Design :: 24.12.2007 10:01 :: ballballball :: Replies: 0 :: Views: 346
I wish to make a cheap ZCD for 220v AC Mains lines.
This is require for my isolated TRIAC firing.
I would require the output of this ZCD to be in 5V range and it should be able to detect both rising and Falling edges.
The PC817 Solution is elegant but requires 2 circuits to make a full detection. If there is some thing possible to do w
Analog Circuit Design :: 11.06.2008 17:41 :: boseji :: Replies: 3 :: Views: 1360
Of course, they using a technique with switches, and then averaging the output. We were doing this is my previous company for the AC-DC converter, which would convert 220v to 5v. Cannot exactly remember what the name was, but google it.
Other Design :: 15.01.2009 17:40 :: Sadegh.j :: Replies: 3 :: Views: 1452
plz help me with the design of a step down transformer 50Hz, 220v AC - 5V AC, i = 0.5A, with high efficiency,
plz its urgent, so desperate. tnx
Analog Circuit Design :: 05.05.2010 18:28 :: parisien :: Replies: 3 :: Views: 2405
Here is an adc project I did using pic.
Now I am going to measure AC 220v without trf. I'm going to use a 220v AC to 5V DC transformerless power supply to interface with PIC ADC. The same thing I want to do with 440V. So I need a circuit (transformerless) which converts 1000V AC to 5V/12V DC. I will do
Microcontrollers :: 27.05.2012 11:21 :: internetuser2k11 :: Replies: 6 :: Views: 1393
why bother to build one ? buy a ready made they are so cheap.
5V 2A Regulated Switching Power Supply (110~220v) - Free Shipping - DealExtreme
Power Electronics :: 12.12.2011 08:51 :: Kripton2035 :: Replies: 9 :: Views: 977
Ok... finally i am getting 5V output from my decoder IC.... I have changed my circuit a little... I am going to use a 12V electro-mechanical Relay which is driven by a 555 timer IC which will output a larger current to relay.... I am not going to use any transistor..... I have attached the circuit diagram.... it is working fine in Simulation
Analog Circuit Design :: 30.03.2012 18:05 :: nithin kamath :: Replies: 14 :: Views: 1102
I want to make multiple output smps to submit as my institute project..
i want its circuit diagram.
Input : 220v
Power Electronics :: 01.05.2012 17:00 :: vnegi2020 :: Replies: 1 :: Views: 593
:???: 10Ω primary, 7KΩ secondary gives a voltage ratio of about 26.5 to 1I always thought it was the proportion of the number of turns that define the transformer's ratio. How does winding resistance come into play?
Or does the Ohms there mean something else?
I've seen the resistances mentioned and the ra
Power Electronics :: 14.05.2012 07:47 :: Artlav :: Replies: 52 :: Views: 1731
Uh sorry I didnt pay attention on his post #3.
Voltage stepdown from 220v to 120V is done with transformator. There is many trafos which regulate US Europe voltage device conflict.
But without trafo this is also possible but should pay attention on needed current.
You can look some solution with usage of Triacs in design for light dimme
Electronic Elementary Questions :: 17.07.2012 23:12 :: tpetar :: Replies: 39 :: Views: 1744
In DC, it's a bit more complex because you can't use transformers anymore.
Sorry can you tell me how Power Inverters works from 12V DC to 220v like on example ? What they use instead transformers ?
What SMPS PSU uses inside ?
Here is not needed voltage boosting, he need to regulate voltage from 9V to 5V or 3,3V.
Electronic Elementary Questions :: 01.09.2012 15:25 :: tpetar :: Replies: 24 :: Views: 721
I need a circuit to convert the 220v ac to 5v dc.
1. Is there any better alternate for changing the level of voltage instead of transformer?
2. I need a very smooth dc. (No matter how big the circuit would be!)
3. what should I consider for Impedance matching?
Simplest would be to use a 50Hz transformer to ste
Power Electronics :: 31.10.2012 13:08 :: Tahmid :: Replies: 9 :: Views: 506
I suggest you try it out first with a transformer. It will not be as bad as you have imagined.
Which IC are you using that accept mV?
I AM WORKING ON 'SINGLE PHASE ENERGY METER' ,i have a lot of i.c for that purpose but each of them needs only mV on their analogue input channels,, how can i acheive such a small volta
Analog Circuit Design :: 19.12.2012 08:26 :: siongboon :: Replies: 18 :: Views: 366
But I don't know how to convert adc value to get actual AC voltage. I used this formula (volt per count = 220/adc count at 220v) to get volt per count value. I keep that value in EEPROM and multiply adc input by that volt per count value to get actual AC voltage. But I got some error of reading
For that purpose you need to apply 220v
Microcontrollers :: 24.03.2013 22:32 :: pnjbtr :: Replies: 11 :: Views: 206
I use linear LM338K regulator its indestructible predator. :smile:
For powering finalized devices I use 3,7V Li-Ion with StepUp IC to 5V or 12V, and of course MCP73832 charging IC, all inside device small and compact. For power input connector I use mini USB.
Under Chinese expansion brand names lose meanings. I stricly look price, benefi
Analog Circuit Design :: 12.03.2013 11:07 :: tpetar :: Replies: 21 :: Views: 475
I have seen some circuits using varistors, diodes, capacitors and voltage regulator to get 5V directly from 220v Power Line.
Some one have experienced to use such kind of solution with uC? In industrial applications? The varistor should "catch" high voltages, but its still safe?
Professional Hardware and Electronics Design :: 09.11.2003 22:06 :: neuralc :: Replies: 9 :: Views: 1931
I am planning to put a PC in my car to view DVD and listen music,and my concern is the Power supply.I don't want to use inverters to get 220v,too gangerous and expensive,so I thought about redesigning the PSU,so it should work from car's 12V. The idea is to use PWM controler like SG3595 and use modified transformer to get the needed voltages.
Analog Circuit Design :: 14.02.2004 13:56 :: DimaA :: Replies: 11 :: Views: 2791
How to get the +5V (30mA) and +12V (20mA) directly from the main 220v (AC)? I need a simple circuit, not to much loses, and avoid of using transformer.
Anyone have an idea & willing to share?
Thx + Rgds,
Hobby Circuits and Small Projects Problems :: 18.03.2004 05:00 :: johan_tr2000 :: Replies: 8 :: Views: 2301
Need an interface that gives me a steady 0 with 220v in and a steady 1 without 220v in using a 4N25 or TIL111 or any other opto that gives galvanic isolation.
Hobby Circuits and Small Projects Problems :: 29.03.2004 22:08 :: fjpompeo :: Replies: 4 :: Views: 2217
Let´s try it now.
The opto is very expensive and I had some problems, maybe a good selected capacitor with the 680K resistance could improve the circuit.
insteed of simple opto why not you used MOC3020 or MOC3040 the 3040
come with built in zero cross and suitable for interfacing and controlling 220vac direct fr
Hobby Circuits and Small Projects Problems :: 28.06.2004 15:43 :: Fragrance :: Replies: 17 :: Views: 5478
Well it looks like a design with the price being the ultimate objective ..Probably you want a little of safety by the same money .
listen Is always possible to get 5 volts from 220v ac depends on how much you want to spend .. The basic solution is rectify 220v and then use a voltage divider to get your 5 v . well not good !. too much drop ! t
Electronic Elementary Questions :: 16.10.2004 05:33 :: eltonjohn :: Replies: 47 :: Views: 24625
hi all ;
is it possible to transmit data through 220v home line , for example i connect an MCU to one home ( with the special circuit ) and some in others homes , then i send data to them through 220v home power lines ?
Microcontrollers :: 27.10.2004 00:00 :: hm_fa_da :: Replies: 16 :: Views: 6155
I want to get 3 power supply 5v/2A, +15v/0.3A, -15v/0.3A from ac 220v.
I think I should use transformer first(tranform to 15v or 5v?), and then rectify it. And then what should I do? and which regulator could provide 5v/2A? Thanks.
Yes you need a transformer. To at least 15 not 5volts. Unless from 5volts you want to go back
Analog Circuit Design :: 30.10.2004 06:50 :: djalli :: Replies: 10 :: Views: 1233
What I would like to do is similar to that of an AC input module for a PLC.
When a 220vAC signal is applied to this circuit it will provide a 5V DC output and this signal will be available as long as the applied 220vAC signal is present.
But I need a working circuit.
Thanks to anyone trying to help me.
Robotics and Automatics Forum :: 12.11.2004 08:57 :: Myself :: Replies: 10 :: Views: 2094
I try to make a flyback power supply for my matrix display. I used PC power supply before but it's too big and complex. I want a small . I have a lot of old PC AT/ATX. Can I hack them? (At least, I can take some component).
I will draw some shematic to post soon.
But I confused about the equation to estimate Flyback Transformer.
It will two outp
Analog Circuit Design :: 20.01.2005 14:16 :: DownSW :: Replies: 14 :: Views: 6271
Put the primaries in parallel for 110V and series for 220v.
Analog Circuit Design :: 30.01.2005 18:50 :: flatulent :: Replies: 4 :: Views: 571
There is anothe way to solve your problem ( And it works fine). Take a Optocupler that has LED in both directions, and connect each pin to the 220v with a 100K res in series. i.e. your power 220v through a resistor 100K to the opto and back through a 100K to the ground of the 220v. on the other side connect the Collector to a 10K p
Microcontrollers :: 14.02.2005 02:03 :: Ace-X :: Replies: 13 :: Views: 1380
hi every body
i am a electronic student,
i want to make a digital counter for home (220 V 25 A ), now i need some information on how to conver AC current to a variable voltage and change it to digital and display it .
any help would be appreciated.
Professional Hardware and Electronics Design :: 23.03.2005 07:14 :: shoja :: Replies: 11 :: Views: 2613
What's the real problem here? Why do you not use ordinary power supply box for negative voltages? If you have ECL, than your ground or chassis of the ECL circuit is at 0 Vdc level. Simply connect positive output (plus) of the power supply box to this potential, i.e. to your ECL circuit ground. Then your negative output (minus) of the power supply b
Professional Hardware and Electronics Design :: 24.06.2005 01:04 :: rfmw :: Replies: 4 :: Views: 1461
from your words i got that u don`t want this negative ground..u can make very good ground(≈0.01v) by making earthing for ur supply metal case....
HINT: if u don`t have earrthing in ur home plugin check with the tester the neutral pin of ur home and connect it to the case of the powersupply((be ATTENTION when u are checking the neurtal u r
Microcontrollers :: 01.07.2005 15:16 :: eng_abdALLA :: Replies: 4 :: Views: 874
I've been searching a way to design an opto-isolated zero crossing detector (220v AC). I've looked the entire forum and google but couldn't find a good answer. I don't want to use a transformer. Anyone have an idea ?
Added after 1 hours:
It's ok, I've found the solution. Elektor 2002 :)
Microcontrollers :: 04.10.2007 10:34 :: elec4fun :: Replies: 28 :: Views: 15070
Well, when the SIDAC turns on, the voltage drop across it is only 1-2V. So if you measure the voltage across the SIDAC while you increase the test voltage, you will see a high voltage across the SIDAC, increasing as you adjust the power supply. At some point, the voltage across the SIDAC drops abruptly to 1-2V. Then the voltage you measured just
Electronic Elementary Questions :: 06.09.2005 18:17 :: VVV :: Replies: 11 :: Views: 1067
I use a voltage divider resistors to get Max 5Vac from 220vac to i feed the A/D converter of the Microcontroller ( I use Motorola Series ) and by software i can detect the zero-crossing point if it is positive or negative
About the hardware i built every thing but i asked about the software , how can i achive the point that i nee
Microcontrollers :: 01.10.2005 17:59 :: bluethunder7000 :: Replies: 3 :: Views: 2916
It is a "flyback-converter" circuit that converts AC to DC in TVs.This circuit is called "switch mode power supply" which is different from linear this circuit there are a transformer,capacitors,resistors,diodes and transistors.They convert 220v AC to 120V,40V,6V,5V...DC whatever you depends on the ratio of N2/N1 of transform
Electronic Elementary Questions :: 06.02.2006 15:37 :: atlantis83 :: Replies: 5 :: Views: 522
what i have is a PIR module , and finally find out how to read the output, i use the osciloscope , and do like what u said , and its working, the pins are 5 V Vcc, GND , and output,
btw how can i turn on/off and dimming the 220v lamp using microcontroller, using the PIR module as an input for the microcontroller. can i just use a solid state rela
Hobby Circuits and Small Projects Problems :: 09.02.2006 13:32 :: aegis :: Replies: 3 :: Views: 1661
For 220v use a 250V RMS MOV. If you have 230V or 240V use a 260 or 275V RMS MOV ..
As an example, have a look at NTE2V250:
The size of a MOV usually indicates it's power dissipation capacity which normally corresponds to it's rating in kA, kilo (1000) Amperes, during a very shor
Hobby Circuits and Small Projects Problems :: 10.03.2006 11:22 :: IanP :: Replies: 18 :: Views: 5004