Are all rectifiers bridge rectifiers?

Do all bridge rectifiers have 2 inputs for ac and two outputs for dc.  I see some components called "rectifiers" which have three pins.  Does  this item change ac to dc?

Question by Noblenutria 8 years ago  |  last reply 7 years ago


Rectifier Problems!?

Hi! I got a problem in my rectifier it is not able to charge my cell phone but it's giving out 4.5 volts of current i measured it with my  multimeter  and my cell phone also needs and input voltage of 4.5 volts.  I think my rectifier ( it's circuit is in the given in the image! )  is not good and need to be modified so i can charge my cell phone. Can anybody give me the circuit with a output voltage of 4.5 volts and it's so rectified that it can charge my cell phone .

Question by ubdussamad 6 years ago  |  last reply 6 years ago


Rectifier Diodes

My friend took apart his broken Kenwood amplifier. He used his multimeter to find the broken part,  then removed the RM4Z rectifier diode. I've been searching for about an hour, but I cannot find any websites that sell the RM4Z diode. The closest I have found was one from Hitachi, but I read that the RM4Z was from a Chinese company. Suggestions?

Topic by freethetech 7 years ago  |  last reply 7 years ago


rectifier repair?

How can we repair the rectifire of the dc system

Question by wasimbari 9 years ago  |  last reply 5 years ago


Diodes for Bridge Rectifier?

 Please Help! I need to make a bridge rectifier for a shake charging flashlight which also include using a 5V regulator - so it won't be a very high voltage, if that matters.  What type of diodes do I need for this bridge rectifier?  HELP!  thank you! patti :)

Question by mckywer 9 years ago  |  last reply 9 years ago


i converted a 230v ac supply to 12v using transformer and using half wave rectifier i converted ac to dc. Answered

The output waveform is as shown in fig. (in my book). When i connected a LED it glows continuously. But if u analyse the output waveform the current varies continuously. i expected the LED to flicker continuously. but its not happening so. can u explain me why?

Question by b_vignesh 9 years ago  |  last reply 9 years ago


if i want to rectify 12v AC to 12v DC how much values of diodes i'll use and how can i calculate it(i.e diode 1N4007)?

Like we mostly used (4 x 1N4007) Rectifier bridge to convert 12v AC to 12v DC.why and how we can calculate it?Formula?

Question by AliR79 3 years ago  |  last reply 3 years ago


Why use 2 mosfets? Answered

Http://electronicdesign.com/site-files/electronicdesign.com/files/archive/electronicdesign.com/content/14978/60488_fig_01.gif In the circuit, they use 2 mosfets namely q1 and q2. I was thinking what does q1 do. I tried simulating the circuit with and without q1 and the result were identical. Almost all synchronous rectifiers are following this pattern, what could be the purpose of q1? input and output conditions... Input: sine wave similar to AC mains (100Vrms 60Hz) Output: half wave rectified sinewave Load: 1kOhm resistor The red curve in the graph represents the voltage in the output The blue curve in the graph represents the voltage of a 1 ohm resistor in the input (for current reading purposes)

Question by codestroy7 5 years ago  |  last reply 5 years ago


Rectifying ac increases voltage?

I have a transformer that outputs 16 volts ac.  I built a 4-diode full wave rectifier and added a 4700uF 35 volt smoothing capacitor.  Now my dc voltage measures 21 volts?  I thought the voltage would drop because it has to pass through diodes.  What explains this voltage increase?

Question by aeronut01 8 years ago  |  last reply 8 years ago


rectify electricity before transformer?

Can you rectify the US mains (120vac, 60hz) as it, and used the pulsed dc to feed into a transformer and get a dc voltage out of the transformer? I'm asking this because it would be much much more efficient for high current situations. Here's my specific situation:I want to build a capacitive spot welder and a capacitive discharge cutter in an all in one device. To charge the enormous capacitor rapidly (1.5 farads in my case), I need a very high current power supply. I'm using a modified microwave transformer that was rated at 1kw, and it is now modified so that it outputs 12 volts AC at around 80 amps (probably less because of losses). This must be rectified to charge the capacitor.Assuming a perfect transformer (for arguement), it would have:120volt, 8.34 amp input12volt, 83.34 amp outputthe following is with full bridge rectifiers, assumed voltage drop: 1.4vIf the power was rectified before the primary, the loss on the bridge rectifier would be: 11.67 wattsIf the power was rectified after the secondary, the loss on the bridge rectifier would be: 116 wattshuge differenceso once again, the final question is: Does rectified input of a transformer = rectified output? Does the 120hz pulsed dc (as opposed 60hz ac) matter? Could this setup charge a capacitor?

Question by guyfrom7up 9 years ago  |  last reply 9 years ago


rectify electricity before transformer?

Can you rectify the US mains (120vac, 60hz) as it, and used the pulsed dc to feed into a transformer and get a dc voltage out of the transformer? I'm asking this because it would be much much more efficient for high current situations. Here's my specific situation:I want to build a capacitive spot welder and a capacitive discharge cutter in an all in one device. To charge the enormous capacitor rapidly (1.5 farads in my case), I need a very high current power supply. I'm using a modified microwave transformer that was rated at 1kw, and it is now modified so that it outputs 12 volts AC at around 80 amps (probably less because of losses). This must be rectified to charge the capacitor.Assuming a perfect transformer (for arguement), it would have:120volt, 8.34 amp input12volt, 83.34 amp outputthe following is with full bridge rectifiers, assumed voltage drop: 1.4vIf the power was rectified before the primary, the loss on the bridge rectifier would be: 11.67 wattsIf the power was rectified after the secondary, the loss on the bridge rectifier would be: 116 wattshuge differenceso once again, the final question is: Does rectified input of a transformer = rectified output? Does the 120hz pulsed dc (as opposed 60hz ac) matter? Could this setup charge a capacitor?

Question by guyfrom7up 9 years ago  |  last reply 2 years ago


Half-Wave Rectifier Question?

Hello Everyone, Well, I built a half-wave rectifier using a diode and a resistor, but it doesn't seem to be working as I want. I'm thinking of adding a capacitor to help smooth out the wave, but my whole purpose was to produce a pulse of energy at 60Hz. Basically, to just chop off the lower half of the sine wave. For my diode I used a 1N5406 rated at 600V and 3 amps. The resistors are rated at 20 watts and the whole thing just plugs into the electric outlet. It seems to work ok, but when I take this rectified output and put it into a transformer to step it up to around 1000V thats when I have a problem. After its stepped up its supposed to charge a small capacitor from which the electricity (when built up) will jump across a small spark gap. The spark gap is adjusted correctly, but he capacitor doesn't seem to like to charge on this wave. Its rated 2KV so voltage isn't the problem. The problem is that it will fire once, but not repeat the cycle.  (The transformer shouldn't be the problem because I'm pulsing the dc) Any Ideas? Thanks

Question by transistorguy 8 years ago  |  last reply 8 years ago


Are bridge rectifiers "downward compatible"? Answered

If I have a power supply circuit that requires a 25.4VAC, 2A transformer connecting to a bridge rectifier, could I use a rectifier that is rated at 50V, 4A, or do I need to get one that matches the input more closely?

Question by Xombee 10 years ago  |  last reply 10 years ago


Bridge rectifier max current

I have 12V 1,8A transformer and few 1N4007 diodes that should rectify only 1A. But if i connect them in Bridge configuration will current pass through 2 diodes at each cycle and be Safe to use Up to 2A?

Question by AnotherD1 11 months ago  |  last reply 11 months ago


LM350 and POWER SCHOTTKY RECTIFIER

Hi everybody.... Can anyone with the " expertize " with the LM350 and a Power Schottky Rectifier, tell me if I can use a Schottky rectifier at 10A instead of the LM350 with 3A, in a variable power supply, with 24V and 15A ATX power supply?  I´m new at this and I´m trying to build a Tattoo power supply from the ATX.  A link to the diagram.  https://www.instructables.com/files/orig/F2D/LMFU/FYYNECNH/F2DLMFUFYYNECNH.jpg   I read that the Schottky has less powerloss, but what is the difference, and please tell me as if I was 5 years old, so that it can sink in :) Iq0100

Topic by iq0100 7 years ago  |  last reply 7 years ago


How to make a high amp bridge rectifier?

I want to drive a peltier plate from a 12v transformer coupled with a bridge rectifier , but the diodes get very hot , so how can I make a high amp bridge rectifier that can provide upto 10 amps?

Question by ssahoo1 4 years ago  |  last reply 4 years ago


Help with controller circuit for galvanic etching machine? How can I eliminate the halogen lamp from the circuit? Answered

I want to put together an electroetching rig (as detailed here), and I already have a battery charger, but I need to make the controller (diagram attached). My question is: Is there a better solution for the circuit than having an 12 volt halogen lamp wired in? That just seems really clunky to me, and my gut tells me there's a better solution that is not "go buy a laboratory power supply". I have nothing against old-school, but this looks positively prehistoric. Anybody?

Question by RavingMadStudios 9 years ago  |  last reply 9 years ago


can I use a rectifier as a dimmer for halogen light bulbs?

I am wiring a custom exhaust hood, and am wondering if I could use a IN5402 rectifier diode rated at 3 amps, 200 PIV connected in series with a 1.9 amp halogen light load, running at 120 Volts AC in order to dim the lights in the hood at about half bright? Wondering specifically if I will run into any problems with the longevity of the "dimmer", or the life of the bulbs? Also wondering if any one might know how I could make a very simple circuit that could slow a fan down to about half speed. I am using single pole double throw bat handle switches to make a high and low setting. High will just go straight through, and low will go through the dimmer or speed reducing module. Thanks rik

Question by wirepig 7 years ago  |  last reply 7 years ago


Does a zener diode work the same as a rectifying diode? Answered

I am making a solar charger and I can only find zener diodes and the voltage and amps I need, do they work the same as a rectifying diode? Thank You!

Question by JaredsProjects 9 years ago  |  last reply 9 years ago


What rectifier should i use?

I have a snowmobile engine in a golf cart, and want to charge the golf cart battery. the snowmobile engine has a stator already for powering the headlight. But the headlight ran on 12v ac. so i need to install a rectifier. Im guessing im going to be working with 20A or so, and it will be charging a battery about the size of your average lawnmower battery. What rectifier should i get that can handle the amperage it would take too charge the battery? The engine already has a regulator, so i will just run the rectifier from the headlight wiring harness because it is getting the regulated 12v.

Question by robotman36 5 years ago  |  last reply 5 years ago


I have some questions on bridge rectifiers and how they work/output current and voltage, see details for full info.

If I use a bridge rectifier to convert AC 110V into "DC" 110(154V), I'm guessing the amperage rating on the rectifier is how much current will be available to use vs the voltage being output as well? The reason I put 154 volts is because peak voltage is 110ac times 1.4. I'm using this for LEDs, just to provide some more info. The bridge rectifiers I have are rated at 200V and 1.5A.?

Question by opliko 10 years ago  |  last reply 8 years ago


BRIDGE RECTIFIER ? used electronic transformers 240AC in, 65va max - 12AC out,, to power LED strip lights?

Hi, I need help to understand what I would need to use a bunch of these (free) old transformers to power various 12vdc LED strip lights in my garage.          I have read-up on the subject of using a bridge rectifier in each circuit to convert the AC to DC,,, BUT,, being completely useless at formula / algebra / maths, I cannot work out which bridge rectifier would work for me. I can adjust the length of LED strip to suit, but the longer - the better!  The LED strips I have are 5m long, 300leds, & the specs say 5amp for the full length. So, is there a bridge rectifier available to buy, what number is it? (same if I need anything else)  Please help,, and try not to baffle me with techy science.  Many thanks.

Question by bowtie262 1 year ago  |  last reply 1 year ago


Electroforming from scraps? Answered

Hi, I was reading the Electroforming 'ible https://www.instructables.com/id/Electroforming-an-Iris-Seed-Pod/ and I have a couple of questions: 1)  It says you need an 18 amp digital rectifier. However in step 13 it says "Check the amp and voltage setting, they should both be at or below 1".  Why do you need an 18 amp rectifier if you only need less than 1 volt and 1 amp? 2)  Is it possible to build some sort of a suitable rectifier from scrapped microwaves?  I know people wind a 10 gauge secondary into the MW transformer to make welders, so can it be done for electroplating too? Thanks!

Question by Morgantao 7 years ago  |  last reply 7 years ago


Charging capacitor from rectified mains? Answered

Recently my father brought 2 6400uf 400v phillips from his work. i want to charge it with rectiried mains. will be using them in paralell for coilgun  1) what is the voltage of 220v mains when rectified?(my voltmeter bunt) 2) when i try to charge them directly from a rectifier it melts my wire due to current. unfortunately i donot have a high power resistor to limit the current. How can i solve this without buying a high power resistor? 3) I want an led to light up when the voltage from the rectified mains is attained. 4)what will be the best. a 55 amp relay or a 75amp switch. i know that the switch can handle much more current but will the switching be quick  enough?   thanks in advance.

Question by ARJOON 8 years ago  |  last reply 8 years ago


Free electricity for a bicycle headlamp

A really good bicycle headlamp needs quite a bit of electricity to make it bright and last a couple of hours. A dynamo requires extra leg power to operate. Yet, there are power distribution lines along the roads where I ride and they emit electro-magnetic lines of force. Imagine a coil of wire on the bicycle that follows the triangle portion of the bicycle frame and it receives these lines of force, converting them to a low voltage AC current. That current would then be passed through a bridge rectifier and a voltage regulator to charge normal size flashlight cells powering the light. Technically, it is probably illegal. Certainly it would be if you were using a coil of wire on your lawn positioned under the power lines to power your house. If it could be done safely, the power company would have a hard time tracking you. It is probably impractical, but it is interesting to ponder.

Topic by Phil B 7 years ago  |  last reply 7 years ago


How do I bring this massive motor back to life? Answered

I have an old, fairly large treadmill motor lying around, and I would like to put it to good use again. However, I have a bit of a problem- the control board is missing, and I don't want to have to get a new one.... The motor has a sticker that says: P.M. D.C. Motor Model-C3354B3304 (judging by the number of hits that I got on eBay, this model is probably fairly popular) ICON P/N M- 190528 21.4 AMPS E62788 CW Rotation INS. Class H OPEN CONST. EXTERNAL FAN 1.5 HP CONT. DUTY @ 95 DC ICON Health and Fitness. (On the far right, it says "2.65 HP") ................................................................ What would be the cheapest way to get this working? I was thinking of getting a bridge rectifier with http://search.digikey.com/us/en/products/GBJ2504-F/GBJ2504-FDI-ND/815157, adding an inductance to lower the current draw, and connecting some old caps from a computer SMPS to smooth the output, but I don't quite know if this will work. Can someone lend a hand?

Question by Shagglepuff 7 years ago  |  last reply 2 years ago


can bridge rectifiers be combined to double the amps? Answered

Say we have 3 amp 3 rectifiers soldered would that function as 9amp rectifier or needed to be wired in a special way, series, paralel with other components? I am building an unknown power wind gen ans I gave 10   3 amp rectifiers. Thanks for sharing.. Al

Question by celalboz 9 years ago  |  last reply 9 years ago


wanted: how to build a dc rectifier for neon sign transformers

Please help me build a dc rectifier for a 10 kv neon sign transformer. i need it to be dc becouse im building an anti-gravity lifter and those dont work with ac

Topic by budsiskos 10 years ago  |  last reply 7 years ago


Trying to change 120 volt AC to 120 volt DC.

I have the full wave rectifier rated at 400 volts and 8 amps and need to know what kind of capacitor/ voltage regulator I might need to accomplish this. I'm powering two 100 watt lights off this. Thanks!

Question by evilgenius32 6 years ago  |  last reply 3 years ago


Fixing a wall-wart?

Hi, I have a wall-wart that is working but I'm having some problems with it. It coverts 220AC to 10VDC with 1,3A current. I've been using it mainly to power up 8cm PC fans. Recently I opened it up and saw that below the diodes,board has turned black and it seems fried, that can be from excessive heat generated by diodes, and part of the transformer that was facing this diodes is melted (as you can see in pictures). I think diodes are 1n4005. 1- my first questions is, why these diodes got this hot ? should I change them with diodes that can pass more current?  I have RL205 will that work? 2- I've read somewhere that after rectifier bridge, if capacitor's capacity is high, it will put pressure on diodes and transformer, is this true ? or we can use any high capacitor we can find ? 3- Is there a law by which we figure out how high our capacitor should be after rectifier bridge in wall-warts ? for example If I had a wall-wart with 1000mF capacitor, can I change it to 2200mF ? 4- I am going to use this wall-wart to power up a 7805 regulator, so that I can feed a lithium-ion battery charger module (4056). This module uses 1A. should I put a high value capacitor like 470mF or more, at regulator's input, or is it unnecessary cause of my wall-wart having a high capacitor ? 5- Are they any ways that I can improve this wall-wart ? like if I keep the transformer cool ,when it;s under load ...maybe add another capacitor ... ?

Question by ehsan_zt 3 years ago  |  last reply 3 years ago


can a tesla coil be rectified with a huge diode? Answered

I found a few hv diode (1 Mega Volt) and some around 240 kv, but the question that I asked myself was if I could get  DC current from a Tesla coil by rectifying it with a proper HV diode. Is it possible???

Question by arenavles 9 years ago  |  last reply 9 years ago


are alternators AC motors with bridge rectifiers and/or diodes? Answered

I've got these two motors that run on direct AC (120 V). I want to generate electricity with them. Will they produce AC electricity that i can then feed through a bridge rectifier? Could you explain how an alternator generates electricity?

Question by cdubnbird 9 years ago  |  last reply 9 years ago


OEM Power Supply

I have an unregulated power supply, with a bridge rectifier. I suspect that the rectifier is damaged. I measured the components and the voltage on the rectifier, every connection past that measures 0 volts. Shall I replace the 4 diodes?

Topic by knektek 8 years ago  |  last reply 8 years ago


I want to double the voltage of a stepper plus rectify it to DC,

I want to double the voltage of a stepper plus rectify it to DC, how can I integrate two below circuits or should I, voltage doubler also rectifies fine?

Question by celalboz 7 years ago  |  last reply 7 years ago


Does anyone know how to hook up a motor to a rectifier and then hook up the rectifier to a capacitator and LED?

Hi Does anyone know how to hook up a motor to a rectifier to convert AC to DC. Then the current needs to be passed to a capacitator, and finally discharged to an LED. I am doing this for my science fair. Thank you!

Question by ronney 10 years ago  |  last reply 10 years ago


Has anyone built an efficient rectifier before, from 220-230V AC to 12V DC as well as a 12V DC to 220-230V AC inverter?

I want to build a DC-AC inverter / AC-DC rectifying system. I want my inverter to convert 12V DC to 220V AC as efficient as possible and without to many components because i want to host my rectifying system in the same box as my inverter. my question is who has designed this two systems before separately of course with the least components and had an efficiency higher then 85%?

Question by FransN 3 years ago  |  last reply 3 years ago


Industrial battery charger

Why the correct maintenance of batteries is essential to warn his exhaustion and to know when to replace it. With proper maintenance,can we avoid the battery failure? Im asking about battery chargers, Digital battery chargers, automatic battery chargers, traction battery chargers, Amperis battery rectifiers, battery charger rectifier! Thank you so much

Topic by GuGaC1 1 year ago  |  last reply 1 year ago


Full Wave and Half wave rectifier (220 Volts AC to 5Volts DC) ? Answered

Hello, I have to make a Full wave and half wave rectifiers which step down 220 volts~ AC to 5 volts DC.  I am pretty aware of the circuit diagrams , I would appreciate anyone helping me with the exact diodes and transformers i need and where i can get them.  Please do let me know about a SAFE circuitry 

Question by ParanoidAditya 4 years ago  |  last reply 4 years ago


Can someone explain about calculation of filtering capacitor for power supply in detail?

Plz explain about Vp-p, freq, Vrms, in DC ! because in power supplys, when the current pass through the bridge rectifier, it is rectified into DC current by the rectifier! I'm really confused about it ! Wanna Know in Detail!!!!!!!!!

Question by ZayarTint 3 years ago  |  last reply 3 years ago


Why is a resistor connected in series witha diode in a rectifier?.

When I asked my teacher he said it is used to make the output voltage unidirectional.It is confusing.Then what is the rectifier for?

Question by Raji Nainar 6 years ago  |  last reply 6 years ago


Wiring up a filter copasitor?

For my Cold Fusion Project I was told to use a filter copacitor with the isolating transformer and the bridge rectifier.  I have had some trouble understanding this.  The mains AC runs through the isolating transformer and right after that I need to hook up the filter copacitior.  How do I know which is positive and negative.  I know AC alternates between + and - but when I need to hook it up to the rectifier I need to find + and -.  How do I do that?

Question by Kalrag 8 years ago  |  last reply 8 years ago


Does anyone know how to wire a full wave rectifier to an alternator to create a motor?

I want to use the alternator off of an old (wrecked) car as a motor but need to know how to connect it up I have heard that you can use a full wave rectifier to do this, but am uncertain as to how to do so.

Question by RickC12 3 years ago  |  last reply 3 years ago


Confused: 12V AC to 12V DC, simple bridge rectifier? Answered

I have a 12V AC power block powering some lights, I want to take one channel off that block and power a 12V DC strip of LEDs, could I just use pretty much any single phase bridge rectifier? They all seem to be rated in the 100's of volts... I know I could do the same thing with a bunch of diodes, a zener and a resistor, but I'd like to just use a packaged chip (because I'm lazy...)?

Question by csavage6 6 years ago  |  last reply 5 years ago


Calculate capacitance across full wave bridge rectifier? Answered

OK,so I need an AC to DC converter.I used a 9 Volts transformer to convert 220VAC to 9VAC,then rectified it to 9VDC using a full wave bridge rectifier(IN4007).I need to know the value of capacitance which is to be connected to the 9 volt DC output(I heard somewhere that its got by multiplying the forward current*5 then dividing it by input voltage to the rectifier and the result is obtained in Farads........well I'm not sure if this is right and I need clarification).I've currently used a 1000uf capacitor and my multimeter shows the dc output from the bridge as 14 volts which is really confusing because before I used the capacitor it showed 9 volts.I really need a way to deal with capacitance.Pls do help me. I've added some pics(not much of help but.....)

Question by Adarsh_tronix 6 years ago  |  last reply 6 years ago


Can I use rectified mains power for electrolysis? Answered

Assuming that I properly insulated the system, would it be practical to use mains power in a hydrogen generator? It seems to me that it should be feasible, but I've heard from some people that hydrogen generators work better at lower voltages. If I could use mains power, would I have to limit the current in any way?

Question by Shagglepuff 5 years ago  |  last reply 5 years ago


Limit current to 170v 5 amps?

So... I connected 120v ac mains power to a bridge rectifier > capacitors to smoothe > switch > output... how can I prevent the breaker from...breaking.  Also the integrated bridge rectifier can only take 6 amps for long amounts of time.  I need to somehow limit current without limiting voltage (at least to much)

Question by TypeNameHere 1 year ago  |  last reply 1 year ago


How can I use a bridge rectifier to convert 120 AC to 12VDC?

I'm using a 12 VDC power antenna to run an automatic coop door opener. 

Question by devlp 2 years ago  |  last reply 2 years ago


How to wind a step up transformer ? Answered

I need to make an ac step up transformer with an input from the main, output of 400v ac to connect to the a bridge bridge rectifier. The bridge rectifier number is D35XB60.

Question by mind power 4 years ago  |  last reply 4 years ago


How, exactly, does a 5AR4 protect against cathode stripping?

I'm in the midst of designing pp 2A3 monoblocks with stand alone power supplys.  I'm thinking more and more about tube life with these triodes being a bit expensive.  Are there other rectifier tubes that will provide the same protection?  I was thinking 5Z3 rectifiers but not sure about potential stripping problems with these.  Can anyone help me out here?

Question by bogenfan 6 years ago  |  last reply 6 years ago


Stepper motor Wind Generator Help!

 I need to know how to wire up my Stepper motor for my wind generator to get as much volts and amps.  It is a PM55L-048-HP69 Taken out from an old HP Printer. HERE IS THE DATASHEET All I need is someone to explain to me how to wire it up and make a rectifier for it. THanks Much!!!

Question by azngiant1212 9 years ago  |  last reply 9 years ago