54 Threads found on edaboard.com: 220 12 Transformer
If you can't find 12-6-0-6-12 configuration you can always use 2 smaller transformeres 6-0-6 and connect their primary windings in parallel (220V) and their secondary windings in series ..
Here is an example of multi-tap transformer from JAYCAR:
Electronic Elementary Questions :: 15.04.2006 19:33 :: IanP :: Replies: 1 :: Views: 1281
Electronic transformers 200 W shematics (220/12 V) Feron transf. needed.
Can anybody upload it?
Service Manuals, Requests, Repair Tips :: 18.02.2005 15:12 :: Alex_TSU :: Replies: 0 :: Views: 783
transformer - No centre-tapped (shown below). Look for 240/12, 230/12 or 220/12 transformers. If you can find 240/9, 230/9 or 220/9, it would be fine too.
If you use a transformer with centre-tapped, you can instead use a full-wave rectifiers (using 2 diodes only), the centre-tapped terminal of the (...)
Electronic Elementary Questions :: 24.08.2005 05:53 :: SkyHigh :: Replies: 4 :: Views: 880
i want to design a supply without using a transformer
the supply is 220/12
i thought to but a rectifier then a resistor then a zener 9v
what i want to know does the supply can supply much current
and is it stable
Analog Circuit Design :: 08.01.2008 13:45 :: mr_byte31 :: Replies: 5 :: Views: 1545
i have a step up 12 v to 220 v transformer.I have the question that is 12 volt input rms or peak to peak.
I mean should i have to apply 12 v rms or 12 v peak to peak to primary of transformer???
Power Electronics :: 30.12.2009 01:26 :: engr.waqas :: Replies: 1 :: Views: 1134
Want to design the transformer the send me ur requirement like what amps, volt and wattage I will send u the data .
For the time basic data for 5 amps 220 to 12V-0V-12V. u need an 2inch X 2inch bobbin. For the 220v use 20SWG and 440 turns, and for 12v use 14SWG and 24 turns then again wire 14SWG and 24 turns.
Use ?E? ?I? soft (...)
Hobby Circuits and Small Projects Problems :: 29.10.2010 14:45 :: amjadali56 :: Replies: 11 :: Views: 4052
I looking for power supply circuit
that input 110to220V AC
output 12V DC 1A
but don't use transformer like mobile
wall charge, notebook.. etc.
a tiny circuit is very good.
How you call this circuit ?
I don't know keyword to search.
Because I am Thai.
Have a good day.
Professional Hardware and Electronics Design :: 14.11.2001 06:25 :: tong :: Replies: 6 :: Views: 2926
I'm looking for a schematic of it, I need a power of 1 KW.
Some one help me
thanks a lot to all.
Hobby Circuits and Small Projects Problems :: 01.10.2002 02:50 :: miguel_roque :: Replies: 7 :: Views: 5618
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 :: 17.03.2004 23:00 :: johan_tr2000 :: Replies: 8 :: Views: 2703
Who can to help me with a schematics for power inverter 12 v DC to 220 AC which provide 3500 Watt to outpout.
I want to use this inverter to supply my house (tv, mixer ,computer etc)
Professional Hardware and Electronics Design :: 14.08.2004 17:18 :: cristimihai :: Replies: 8 :: Views: 4046
i want to make inverter 12 to 220 volt
i can bulid transformer
what is the best for main transformer 500va is to roll dc(12 v) line i mean big diameter --primary line first
or to roll the small diameter(220) line
for heat and noise
Professional Hardware and Electronics Design :: 02.11.2004 11:05 :: newnewnewnew1 :: Replies: 3 :: Views: 1288
You can try this method:
connect a small 220/12 (or less) transformer between each phase and Neutral (I asume you have access to N or E, in isolated circuits the primary should be rated for 400V and connected betwee phases). If you want to monitor each phase separately you will need 3 circuits with OR function at the final stage.
Rectify the volt
Electronic Elementary Questions :: 01.02.2005 08:37 :: IanP :: Replies: 2 :: Views: 1540
I'm trying to convert a sat positioner box by replacing the 220 volt input transformer with a 120 volt input transformer.
I don't have definate specs on current, but something like this should be fine:
120 v primary
12 volt secondary at about .5 amps
36 volt secondary at about 2 amps
The 12 volts drives a small microcontroller (...)
Hobby Circuits and Small Projects Problems :: 01.05.2005 07:08 :: pcrider :: Replies: 1 :: Views: 1362
You make the very very simple problem as large problem .. no need incase of implementing a DC power supply ( that you called AC to DC converter ) to calculate voltage drops or whatever if you will use regulator .. just i want you to know that voltage out from the transformer is root two its peak value .. so for example if you are speaking about 220
Analog Circuit Design :: 06.07.2005 20:27 :: ahmad_abdulghany :: Replies: 5 :: Views: 3928
Here you have an example of 220ac/12Vdc smps:
However, if you don't feel confident about HV ferrite transformers then you should consider a step-down transformer 220/24Vac + bridge + smoothing cap, and a switchmode dc/dc converter build around sme 5A IC, such as for example LM2768: www.national
Professional Hardware and Electronics Design :: 05.08.2005 02:42 :: IanP :: Replies: 11 :: Views: 2946
I need a circuit for 5v/12v DC supply from 110/220 AC. The common way is to use a transformer, a bridge and a voltage regulator. I know this way, but it is needed to be done without using trans becasue of its weight. The maximum current is 500 mA. A friend told me to use HV capacitors instead of Trans to reduce the AC voltage, the other p
Hobby Circuits and Small Projects Problems :: 11.01.2006 08:47 :: azerm :: Replies: 10 :: Views: 24168
Here is the shematic of the regulated power supply
Here is the component list:
F1 - 2A fast acting fuse
R3 - 4700 Ohms Potentiometer
F2 - 250mA fast acting fuse
C1 - 4700uF/35v
S1 - SPST (Single Pole Single Throw) Switch
C2 - 1uF/35v
T1 - transformer 3 Amp (Primary 1
Hobby Circuits and Small Projects Problems :: 08.03.2007 01:25 :: linoko :: Replies: 13 :: Views: 18587
If it is stepdown transformer 220-12VAC and then you need 6VAC so you can:
1. Plug this transformer to 110VAC outlet instead of 220VAC as usually.
2. at secondary winding, connect in series with the load a resistor of the same resistance with your load. Of course you need to use the right resistor with the suitable (...)
Electronic Elementary Questions :: 13.02.2007 09:05 :: nguyennam :: Replies: 8 :: Views: 2372
Is it possible to step down the Voltage of the high voltage transformer from a TV to 220 to 240V and more Current (means more Amps aroind 20 to 30A) using a stepdown transformer.. guide me:D
Hobby Circuits and Small Projects Problems :: 22.09.2007 01:46 :: dmmahesh :: Replies: 11 :: Views: 1272
I am in need of some help. I am in need of a transformerless power supply will allow me to have a universal ac input 110/220 volts and an output of 12 Volts at 3 amps. I had a couple of old monitors around the house that were auto switching. I traced out the ac portion of one of the
Power Electronics :: 10.10.2009 13:20 :: pcleats :: Replies: 6 :: Views: 6827
i want to make a small invertor that converts 12 volt dc to 220 v ac at 50 hz i am facing problems some people are telling me that i should have a heat sink with my transformer if i want to run any appliance!!!!! also i am facing current problems that need enough current to run the transformer!!!!! need some help that should i have a (...)
Analog Circuit Design :: 17.12.2010 18:39 :: knark :: Replies: 4 :: Views: 352
check following links , they may be useful for you
12vdc-220vac 100/200watts sinewave inverter
dc to ac converter...
12vdc - 240vac power Inverter
Power Electronics :: 18.12.2010 22:19 :: hanif :: Replies: 7 :: Views: 1910
You can find the minimum relationship (number representing n1/n2) this way:
n1/n2 > (220×√2)/12 = 25,9.
Other than that, it's important that transformer core does NOT saturate when feed with 12V@50Hz input.
I would have choosen n1/n2 ≈30.
Power Electronics :: 27.04.2011 18:30 :: Prototyp_V1.0 :: Replies: 2 :: Views: 1878
It is also possible to do a capacitor dropper (e.g. a 680nF, 275Vac, 2 x 220 ohm 2W, and a diode bridge of 2 zeners (24V say) and 2 diodes & a 220uF cap (35V) to get 50mA say at 24V, this can then be connected to a very small uncontrolled 100-250kHz square wave driver (full bridge or half bridge) and thru a very small transformer to the (...)
Power Electronics :: 30.08.2011 21:35 :: Orson Cart :: Replies: 8 :: Views: 478
The transformer is that used in an IDE psu 220 ac input, 12v 2A 5V 2A output.
It is an EI ferrite transformer with
a gap between the center leg of the E shaped part and the I part ,the center leg is cylindrical.
Its dimensions and number of turns for each winding are known (i have dismantled it).
I found IDE psu schematic (or (...)
Power Electronics :: 19.09.2011 04:20 :: koshary :: Replies: 2 :: Views: 398
I hve read the thread regarding Full Bridge Inverter with MOSFET and IR2110 gate driver but unable to understand that how the 12 Volts (single Batter) can be raised to 120/220 Volts without step up transformer.Any one should explain it. Thanks,
Electronic Elementary Questions :: 11.10.2011 06:35 :: ch wazir :: Replies: 1 :: Views: 1112
I need to make a converter from 220VAC to 12VDC -4A to operate a solenoid
i required this circuit for pulse shot only (800ms -1s)
please tell me any circuit i can not use transformer .
only linear circuit.
Power Electronics :: 01.02.2012 04:30 :: saeed_pk :: Replies: 10 :: Views: 2555
I want to design a pic micrcontroller based switch mode(Ferrite Core transformer) Based 12 Volt DC to 220 Volt Ac 50 Hz Inverter. today i have downloaded a circuit from this forum but i dont understand. can any one help me to understand the circuit as well as required Microncontroller Code and also ferrite core transformer (...)
Professional Hardware and Electronics Design :: 16.04.2012 12:53 :: engmunir :: Replies: 0 :: Views: 1301
remember conservation of energy?
Well, for an ideal transformer, the power into the primary = power out of the secondary. Since you want 220*5=1100 watts out, you need 1110 watts in, or 1100/12=92 Amps. But since you can't buy an ideal transformer, you're going to need to put more than 92 amps in. You need to know the efficiency of the (...)
Analog Circuit Design :: 24.06.2012 17:03 :: barry :: Replies: 7 :: Views: 246
1st: 12v/100ohm = 0.12 A = 120 (and NOT 40) mA relay current !!
2nd: the value of R1 (now 2.7ohm) is too small, use min. 220ohm here (to decrease max. current peak!!)
3rd: always use an additional R2 resistor (for ex. a 470kohm) parallel to C1 to avoid an unwanted shock
4th: the value of C1 (now 1.25uF ) is also small for the wanted 120 m
Analog Circuit Design :: 29.06.2012 05:36 :: zuisti :: Replies: 15 :: Views: 795
Most probably a curent surge produces the voltage drop on ac main supply and your transformer has <1 VA power rating, try a different transformer 220/12 V ; 5VA ... or whatever standard type transformer that is greater than the one that you use now
Microcontrollers :: 14.11.2012 13:01 :: zsolt1 :: Replies: 4 :: Views: 225
Use transformer. But on transformer primar you need lots of current. Core 30mm x 25mm 56W, Sec 220V at 200mA EI type of iron core. Primar 12 turns of thicker wire, secundar 1397 turns 0,31mm.
Power Electronics :: 01.01.2013 11:06 :: tpetar :: Replies: 6 :: Views: 236
I'm learning how to make an inverter, and need help figuring out what is normal and what is not, and fixing the latter.
The basic layout is - make 320V from 12V, using a high frequency, small size ferrite transformer, rectify the 320V, turn them into AC with a full bridge.
It splits nicely into two parts, and i want to debug them separately.
Power Electronics :: 04.01.2013 16:41 :: Artlav :: Replies: 11 :: Views: 3069
hi i need a Electronic circuit to convert 220 to 12 for turn on 3 led
Analog Circuit Design :: 01.02.2013 09:49 :: mo2_star :: Replies: 4 :: Views: 289
I am designing a 1KVA, 12VDC to 220V RMS AC, Sine Wave digital power inverter.
It should be low cost, Sine Wave (PWM) design with good load regulation. Extras like pulsed battery charging are welcome.
Professional Hardware and Electronics Design :: 07.05.2003 04:36 :: asit :: Replies: 5 :: Views: 4427
For low power (< 50W) you can use sinwave generator (eg. ICL8038) and just amplify this signal using linear amplifier and 12/220 transformer connected opposite way around. Tha output will be nice sinewave but unregulated ie. depending on load the voltage may drop 5%...15%....
If your power requirements are higher I would't bother. There is no si
Analog Circuit Design :: 19.10.2004 01:35 :: IanP :: Replies: 1 :: Views: 910
If we invert 12Vdc into 220Vac, 50Hz what extend of current (Amps) we can use from the output. Say it is 500W means we may use upto 2Amps., is it right, after getting that output is it possible to stepup up into higher current rate upto 8Amp with same 230Vac? If so what can we do with the transformer or circuit and what would be the forumla we've t
Hobby Circuits and Small Projects Problems :: 16.09.2007 23:29 :: dmmahesh :: Replies: 2 :: Views: 1118
Assalam o Alaikum
i want to design an inverter giving by giving 12V input and gettg 220 V output. The input im giving is with the help of an oscillator
reply soon plzz..!!
Analog Circuit Design :: 01.10.2007 10:19 :: mtkhan :: Replies: 6 :: Views: 1098
Another option is to use 2 standard 220-240 low-VAs transformers, say 230-to-9V, and connect their primary windings in series - this will expose each winding to no more than 200Vac ..
Secondary windings can be connected in parallel, in series or CT, as required ..
Analog Circuit Design :: 27.03.2008 02:20 :: IanP :: Replies: 6 :: Views: 588
Thanks for the reply.
Well, i think the High Frequency Ferrite transformer's wire should be upgraded with a different gauge...? But, we don't know the number of windings and the mutual inductances?
Nokia CA-44 is an official Charger Adapter. Its about Rs.220 ($4.7). The local is Rs.20 ($0.5). And there is another Charger from Nokia, it
Electronic Elementary Questions :: 20.11.2009 09:23 :: pravardhan :: Replies: 4 :: Views: 1633
High of secondary winding is 45cm, diameter of the pipe is 9cm so you can easily calculate that frequency of that coil is about 100KHz
Primary winding consist 12 windings of cupper wire with 4mm square
Wire for secondary winding i
Show DIY :: 16.04.2010 16:46 :: gres :: Replies: 0 :: Views: 1514
i am confused about max load current
if i have transformer input 220 V / output 9 V how can i know how much max output current can supply?
and the samething if i have solar cell supply for example 12 V DC and i dont have datasheet for it how can i know experimentally check the max output current can supply and hence the watt of it
Electronic Elementary Questions :: 02.09.2010 07:45 :: andro :: Replies: 2 :: Views: 2493
I am making an amplifier on two tda2030a. Now anything is connected to the pcb and the only problem is that i need to buy the correct transformer and connect it correctly.
I don't have the schematics, but i have uploaded a part of the schematics where i need to connect ac - gnd - ac. It needs bipolar power supply and i ha
Hobby Circuits and Small Projects Problems :: 09.10.2011 14:37 :: SANDEEP ANAND :: Replies: 4 :: Views: 842
This project is new for me however I designed lot of square wave inverters using transformers(12+12/220) but looking your project using full bridge with MOSFETs and IR2110 pure sine wave in which you have not used transformer,how voltage from 12 volt(single battery) will be raised to 220v there any one to make me (...)
Power Electronics :: 11.10.2011 08:54 :: ch wazir :: Replies: 0 :: Views: 1124
In post #11 in your circuit you showed 170 volts input to the MOSFETS, is this input voltage you are using? If yes what output voltage you want? And which form, AC or DC?
Your question is confusing (atleast to me) make it clear first.
In your post #5 you said
Yes I want to make a transformerless inverter 12v to 220v for use i
Power Electronics :: 05.11.2011 06:33 :: Raza :: Replies: 43 :: Views: 4376
Yes it is a pulled out transformer from an APC UPS. I could not confirm the higher side whether it is of 220 volts or 110 volts. That is why I am not asking to connect mains to it but it is confirmed that the lower side is of 12 volts and I am asking to connect a 12 volts AC source so the higher side can be confirmed for proper voltage i,e; 100 vol
Electronic Elementary Questions :: 14.12.2011 01:10 :: Raza :: Replies: 21 :: Views: 574
Kerim, I think you've got it a bit wrong. First, it was stated that the transformer was 230 in/12 out; for some reason you are using 12/220. It's not immediately clear if the input to the MCP3909 can accept a floating input (the maximum common-mode voltage is +/- 1V). What I would do is put a voltage divider on each leg of the (...)
Analog Circuit Design :: 22.03.2012 10:14 :: barry :: Replies: 19 :: Views: 842
The inductances of the primary and secondary should be different if the ratio is different: L1=L2*(N1/N2)^2 . For example, let's say you have a 1H secondary inductance and the ratio is 12/220, then the primary would be approximately:
L1 = 1H*(12/220)^2 ~ 3mH
Also, the coupling coefficient can be safely chosen as 0.99, but set it to 1 for a better u
Power Electronics :: 22.05.2012 03:10 :: bubulescu :: Replies: 3 :: Views: 679
for instance we have a 220/24 back to back with a 220/18 . 220/18 = 12.2 . 24 x 12.2 = 292.8 V ac output
An example that shouldn't be implemented. Operating a transformer at 133% of it's rated voltage will bring it near to saturation, involving high magnetization currents and possibly overheat it.
Electronic Elementary Questions :: 15.11.2012 13:25 :: FvM :: Replies: 12 :: Views: 538
C2 and C3 appear to be only 220 nF. They need to be a much larger value (probably 100 uF or more). That should bring up the output to a higher volt level.
Analog Circuit Design :: 15.03.2013 13:23 :: BradtheRad :: Replies: 3 :: Views: 318