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A diode bridge is a device that changes Alternating Current(AC) to Direct Current(DC). The difference between these two kinds are that, AC is pulsed electricity switching polarities 50-60 times per second.(If you look at electronic devices it says that it runs on 50 Hertz AC)Switching polarities= - to + and + to - 50 times in a second.DC is a continious current coming out.Example batteries.The polarities do not change in DC.The problem with AC is that you cant charge batteries with it.

In this instructable i will show you how to make a diode bridge.

(NOTE: This is not an instructable about how to charge batteries.If you are going to use the device, use it correctly.
For Example DO NOT PLUG IT IN THE POWER OUTLET AND TRY TO CHARGE YOUR BATTERIES SUPERFAST!THE BATTERY MIGHT EXPLODE AND CAN CAUSE INJURY OR DEATH. USE A CORRECT STEP STEP UP,DOWN TRANSFORMER IF YOU KNOW THE VOLTAGE RATING)

Step 1: Materials

A: 4 diodes(black ones)

B: 4 wires (2 for AC input 2 for DC output)

C: AC source (NEVER USE POWER OUTLET UNLESS YOU KNOW WHAT UR DOING, OR B: YOU ARE GOING TO DIE WITHIN 2 HOURS BECAUSE OF A DISEASE)

D: Pliers( if you dont have any,buy one or rob it from someone)
<p>hi,</p><p>I need an output current of 2.8V and a variable current varying from 15 to 25 to 35 A from an input of 220V Single phase supply. Plz draw me a small diagram on how to do this. God Bless u</p>
<p>how to convert 110v ac to 220v dc? need asap. pls. thank you ;)</p>
Is this attached circuit works fine? Any modifications need to be done.... Help me out in choosing the values of resistors &amp; capacitors. Thank you
<p>thanxxx dude.....this really works......helped a lot</p>
<p>Thanks for the post. I am trying to test motors from 240 V AC appliences (e.g. a motor from a washing machine) using DC batteries at a safe voltage would this diode brige be safe to do this. </p>
<p>Thanks for the post. I am trying to test motors from 240 V AC appliences (e.g. a motor from a washing machine) using DC batteries at a safe voltage would this diode brige be safe to do this. </p>
No, you would need a circuit to produce a 60 or 50hz sine wave at whatever AC voltage you want. what application do you need to convert DC to AC for?
<p>What is the output polarity of the DC current?</p>
<p>I just get artictle about &lt;a href=&quot;http://911electronic.com/tunnel-diode-characteristic-symbol-definition/&quot;&gt;tunnel diode&lt;/a&gt;, if you need to get more information about this electronic device check this.</p>
<p>i am not so good at working with circuits but this is supereasy</p>
<p>nice job</p><p>i am making electricity producing footwear using piezo discs </p><p>piezo produce in ac but to use in dc with this cool circuit</p><p>thanks very helpful</p>
<p>converting AC TO DC the voltage increased 1.414 time of given ac supply to the recifier circuit.it is done in practical.so24 volt AC supply after rectifiying it give 33.9 volt.</p>
<p>Thanks so much for the info. I built a simple ac to dc converter using your diode bridge rectifier. I've uploaded a pic of what mine turned out.</p>
Mine is acting weird, I used a Step Down transformer, from 220 to 24V and 5A. But, it is providing 11-12 A and 40 V, what to do? I used a capacitor to smooth out the output. Please help, I need it to run motors for testing purposes
<p>USE LM7824 Voltage regulator to control output at 24 Volt</p>
<p>a voltage regulator should be used, first charge a battery, then run your motor from the battery if you need precise control</p>
<p>if you look up a ac to dc converter it will work better. you will need a transformer to decrease the ac voltage, then the rectifier, next a smoothing capacitor should be used (look up the correct size), a voltage regulator can be added for a specific voltage, a voltage regulator can be used in combination with resistors, capacitors, and a potentiameter to create an adjustable voltage, current is more difficult to adjust.</p>
Actually its not such a good idea to connect this bridge rectifier directly to 220 volts AC,because the system will develop too much heat which is really undesirable and can cause damages.Usually such bridges are used after the mains voltage is stepped down to a lower voltage.But if you really want to convert 220 VAC to 220 VDC,be specific to buy diodes rated for use with higher volts.
with the rectifier is there is any way to sober the voltage to 12volts dc with 2 amp????
with the rectifier is there is any way to sober the voltage to 12volts dc with 2 amp????
with the rectifier is there is any way to sober the voltage to 12volts dc with 2 amp????
whan use diod bridge what the values of:-ac voltage,frequency <br>for charging 1.5 D.C battery
what kind of diodes should i select, can i mix small ones with big ones? <br>what is the best model to use in different setups?
OK, that's pretty awesome. But what's the DC voltage coming out of yours?
how can you come to know which is AC - ,+ corner and which is DC -,+ Corner??<br><br>whole thing is messed up buddy....
The connection where two marked sides of the diodes meet is the DC +ve and the connection where two unmarked sides of the diodes meet is the DC -ve.AC Doesn't have +ve or -ve and can be connected to the other two connections between the diodes in anyway.I am making this as simple as it could be.Hope it helps!
AC changes polarity 60 times per second. That's the whole reason for this diode bridge. <br><br>A diode only lets current flow in one direction. Therefore this diode bridge works by only letting the positive out of one side, and the negative out of another...<br><br>NOT messed up.
Thanks so much for this instructable! I was having a really hard time trying to buy a ac-dc converter, I can't find one that could be used for my purpose ANYWHERE! Your instructions were straightforward and made a lot of sense. I am doing my science fair about charging my IPod on my bike energy, so it definitely will help my project with this info. Thanks again so much for posting this, you're amazing!
Thanks so much for this instructable! I was having a really hard time trying to buy a ac-dc converter, I can't find one that could be used for my purpose ANYWHERE! Your instructions were straightforward and made a lot of sense. I am doing my science fair about charging my IPod on my bike energy, so it definitely will help my project with this info. Thanks again so much for posting this, you're amazing!
Thanks! It works fine, but the current is so small :(<br>Is there a way to increase it?<br>I need about 10 amps.
how long did it take to charge a 10 volt battery?<br>what was the output voltage? <br>what transformer were you using?<br>how many amps does that put out?<br>would it charge a 12 SLA or regular car battery?<br>if so how long would it take? <br><br> thank you?!
woks with 220 v ???
ya
<strong><em>Can i use 1N5818 Schottky Rectifier Diode to make the rectifier </em></strong>
SOMEONE PLEASE REPLY!!!! im useing this to power radio nequipment so i need it as smooth as posible. could i connect a cap beteen the 2 dc outs or from just 1 out to the equipment leads?
put it in parrelel with the dc out so like the - with the - DC and the + with the + DC. Make sure its rated a little bit above the rated voltage and a higher uF will smooth it out more but takes a bit to 'fill' up.
GOOD JOB!!! Thanks.
could i use LEDs instead since they are light emitting DIODES?
LED's are pretty sensitive to over-loading so they would burn up pretty quick, especially at high voltage like that.
umm no you cannot, unless the AC voltage is UNDER THREE VOLTS. I probably didnt mention on instructable but the diodes i used was 1N4007 which can handle up to 1000 Volts and 1 Amps.
What about those new 200v leds?
there are 200 volt leds??!?!? wow i need to get some of those! sure why not?if the leds are 200 volt then sure, it will work.
Oh yeah...they cost 200 dollars too!<br/>You can only buy at least 50 or none Yeah really<br/><em><sup><em><sup><em><sup><em>No there are no 200 volt leds out there</em></sup></em></sup></em></sup></em><br/>
LOL I JUST SAW THAT TINY FINEPRINT YOU WROTE UNDER THE COMMENT TODAY! IT SAYS "there are no 200 volt leds out there"
Wow really?<br/>It took you <em>that' long? XD'</em><br/>
lol yea..i zoomed in to 175% cuz i was like "WTF does that say?"
does anyone know what type size these diode are i need something simaliar. Thanks
This is a 40 amp 600 volt diode &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &lt;http://www.hurricanewindpower.com/servlet/the-146/Wind-Turbine-40-AMP/Detail&gt;<br><br>I guess that's a mega diode.&nbsp;<br><br>You can use two diodes in parallel(anode to anode, and cathode to cathode) as one big diode I'm pretty sure.&nbsp; And finally, syncing circuits from two different breakers is a bad idea. Definitely against the NEC lol.&nbsp; If you have any more questions, shoot..<br><br><br>

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