These are part of AC to DC conversion. A half-wave rectifier keeps only the positive part of the signal. A full-wave rectifier also keeps the negative part, but flips it to make it positive too.

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synchronous buck converter with different MOSFETs

do you know if it is possible to use different type of MOSFETs in a syncronous buck converter for the hi-side and the low side switch? How does this improve the converter efficiency? Thank you
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1answer
44 views

What is a capacitor ripple current?

Suppose I have a simple full wave bridge rectifier, with resistive load. Is capacitor ripple current a charging or discharging current? Or maybe it is an avarage/RMS of any current flowing through a ...
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2answers
33 views

Limit voltage/current of bridge rectifier

Assume I have a small bicycle generator which usually feeds the front and back LED/light bulbs. Powering a small gadget from this generator should well be possible. The setup would involve a ...
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1answer
48 views

Half bridge and full bridge control rectifier [closed]

Why do we use 2 SCRs and 2 diodes in a half bridge control rectifier and 4 SCRs in a full bridge control The image above shows a half bridge control rectifier Full bridge control rectifier ...
2
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1answer
240 views

Voltage regulator using bipolar NPN transistor

I came across a circuit, and I got some questions about it. What is the reasoning behind using the NPN-transistor? What part of the circuit draws the most current?
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0answers
6 views

Time Delay Relay and Flyback Diode [migrated]

I need some help. I want to control an aux. fan on my 1969 MB which is currently wired to run till the temp drops below the sensor level which some times takes a long time even after the car has been ...
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1answer
72 views

What is the difference between rectifier/signal diode and zener diode?

I need to caution: I'm absolutely beginner in electronics! :) I'm stacked with the difference between rectifier and zener diodes. I've already read all the answers at ...
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2answers
100 views

Rectified differentiator problem

I have a problem working on Lab 3-5 from Horowitz's Students Manual for The Art of Electronics. The circuit is like that: The author suggests compare the RC time constant of two version of this ...
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0answers
48 views

full wave rectifier is not rectifying the wave properly

the following rectifier does not create a wave that is rectified evenly. according to the books this should work when using a centre-tap transformer. scales : (Y = 10ms/div) & (X = 5V / div) ...
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3answers
67 views

How can I know the rated current of a 6v transformer?

I've an old bulk transformer. It is 220V/6V. I Connected it to the basic rectifier circuit with a voltage regulator (7805) so that the output voltage is 5V. The transformer produces about 8V DC ...
2
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2answers
86 views

Is this an RC filter in the circuit for a nightlight?

So there is this nightlight (a little flower that you plug in directly into a mains socket and switching it on gives you some light to light up your bedroom at night) which I dismantled and tried to ...
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1answer
68 views

Where do I put capacitor in my diode bridge AC to DC circuit?

I want to make a AC to DC converter, the seller give me these: KBP307 diode bridge 2a104j capacitor And a 470uF 50V capacitor. All I can find on the internet only use one capacitor or two ...
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3answers
444 views

Schottky barrier diode as a bridge rectifier?

I need a bridge rectifier for my project and the diodes I currently have can only handle up to a maximum of 1 amp which is not enough. But I have a bunch (YG862C15R) - datasheet. Can I somehow use ...
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1answer
51 views

Questions about a basic power supply

What is the difference between the peak voltage and the rms voltage? In our country, the standard voltage in houses is 220V AC. Is it peak or rms? In the rectifier (I use full-wave bridge rectifier), ...
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1answer
56 views

Amperage before and after rectification

I recently received a variac variable ac transformer. It is a older model so I decided to modify it a bit. I will add analogue amp and volt meters to show what the "current" out put is(pardon the pun) ...
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1answer
60 views

Non-rectified Voltage output across the capacitor

So I am testing my PZT Piezoelectric material's Voltage output across a Capacitor of 1000uF after converting AC to DC using an Oscilloscope. Oscilloscope model: Gwinstek GDS-2102. The diagram is my ...
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2answers
86 views

Max diode current half wave rectifier

simulate this circuit – Schematic created using CircuitLab Given a half wave rectifier composed of a sinusoidal source with peak voltage \$V_p\$ with freequency f, diode, parallel to load ...
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1answer
54 views

How do I keep a square wave output voltage high for a TTL application?

I am passing an AC signal (24 Vrms at 1K Hz) down a line through a diode of unknown bias. Due to uncontrollable variables in the environment, there are 4 possible outcomes: Positively Rectified -> ...
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1answer
83 views

How to add a capacitor and switch correctly to piezoelectric circuit?

Am a hobbyist beginner with no prior electrical engineering knowledge (though can follow a basic circuit), so please bear that in mind when giving your valued advice! am following an instructable to ...
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1answer
103 views

How to measure the efficiency of a full wave rectifier?

Given a full wave rectifier (http://www.electronics-tutorials.ws/diode/diode_6.html) with an RC filter on the DC output, how can I measure the efficiency of conversion? simulate this circuit ...
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1answer
71 views

BLDC generator output current

I'm using the following BLDC motor as part of a project to generate power: http://www.rcdude.com/Cobra-C-3520-18-Brushless-Motor-p/c-3520-18.htm I'm able to spin this motor to about 3000 RPMS which ...
4
votes
2answers
138 views

Why do offline switching converters often use discrete rectifiers for bridge?

In conjunction with my independent study of switching converters using textbooks, I am more or less obsessively tearing apart all the low-ish power (say 5 - 25 Watt) switching converters I can find. ...
5
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1answer
113 views

How can I observe rectifier switching noise?

I understand there is such a thing as rectifier switching noise. I would like to observe it on the bench, but I don't understand its causes well enough to design a test setup. Once in hand, I'd like ...
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5answers
587 views

Is a half-wave rectifier particularly hard on a transformer?

In the book Practical Electronics for Inventors, 3rd Ed., the authors recommend against using half-wave rectifiers because they're inefficient and cause "...the core to become polarized and to ...
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2answers
81 views

Where from the second half-wave of rectified voltage comes in full-wave rectification?

I know it may be sounds silly! But I can not figure out where from it comes - the second half-wave (let's say positive) in full-wave rectification. Is there any key to understand it? I mean: there is ...
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3answers
156 views

How to: The basics of transformer VA calculation for voltage regulation using full wave rectification

Likely this procedure has been repeatedly discussed here. But I want to put the pieces together in this certain domain. So let's say we need to get +/-12V at the outputs rated at 1A using classic ...
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4answers
96 views

What is capacitance required for this 3 phase rectifier

In the diagram above I want to know the value and the rating of the capacitor that should be used for good rectification The Line to Line voltage is 400 , and by relation Vdc =(3√2 VL)/pi=(3√2 x ...
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3answers
84 views

Vpp for American split-phase 110V AC

I know the 'nominal' voltage of 110/115/120 is both based on Vrms and that stability @ any of those levels is pretty much a fairy tail. I also know that most rectifiers will output ~130-150V after ...
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1answer
53 views

LTSPICE Bridge Rectifier - Odd Output

I'm trying to simulate a simple full wave rectifier in LTSPICE. The output I am getting is not what I am expecting. In the picture below, the green line is the voltage output from the + terminal of ...
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2answers
110 views

Why do we need to rectify or amplify the current/voltage? [closed]

I am a beginner in Electronics. What i read now a days in my text book is about diodes,transistors etc. They are used for some rectification and amplification etc ? I wonder why do we need to give ...
2
votes
1answer
260 views

Why would someone prefer halfwave rectifier over bridge rectifier? [duplicate]

The other day, out of curiosity I was measuring the current wave shape of a laptop charger. The wave shape indicated a spike only in one half cycle. I'm guessing half wave rectifier here. One thing ...
2
votes
2answers
111 views

Why is the power supply terminal is not connected to ground in this bridge rectifier?

Above is two identical bridge rectifier circuits. Input is a 12V sinusoidal voltage source. Red is the source. Blue is the output from the circuit on the right side. Green is the output from the ...
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1answer
34 views

Sensitive AC detector circuit

I built a field mill based on this video link. This device generates a sine wave, where I am interested in the amplitude. Once i have the peak, or average value (does not matter, but average would ...
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1answer
85 views

Bridge Rectifier questions

I need to build an ammeter circuit for a model train layout. I want to use an analog ammeter (I just like the look of them) but I have to do some special stuff because DCC (the control system for the ...
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1answer
474 views

Why such low voltage across my filtered half-wave rectifier?

Essentially my problem is this: I built a simple half-wave rectifier with some capacitive filtering, but I can't account for why my voltage is so low. Below is the circuit I built: Vs is 5V ...
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4answers
537 views

Full wave rectifier vs full wave bridge rectifier

What is the difference between the full wave rectifier and the full wave bridge rectifier? In other words what do we gain if we use the bridge? As far as I know both do the same thing while the bridge ...
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2answers
146 views

Amplify the signal from ACS712 to adc

I am trying to amplify the signal from ACS712 to read it better. The problem is that I am using an 8-bit ADC, and what I want to take measure are things like energy-saving lights, or other things with ...
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3answers
133 views

Direction of flow of current in secondary circuit in AC transformer/rectifier

In this transformer/rectifier if the current in the primary circuit is clockwise what will be the direction of current in the secondary circuit?Why? I'm feeling a bit confused about the direction ...
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1answer
57 views

ESC to convert AC to DC?

I'm starting a project where I want to use a BLDC motor as a generator. I understand that BLDC's need an ESC to be controlled. Essentially an ESC converts DC power into AC and provides the necessary ...
6
votes
1answer
174 views

Two-sided connectorless USB on a PCB

This question is inspired by Connectorless USB on a PCB. I saw a cool USB LED on AliExpress that can be inserted in either direction: I'd like to build a board with a similar symmetric ...
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2answers
77 views

Scr triggering design, shuld i use four pulses for each SCR ot two for each pair of the SCR?

I have used a TRIAC and an MOC3021 opto-coupler connected to a PIC16F887A to simulate a a full wave rectifier. I am now to design the same using an SCR h-Bridge. My question is, in order to trigger ...
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0answers
89 views

zener diode as rectifier in cheap mobile charger

Opened a very cheap mobile multi charger and find a zener (4.8V, 1/2W) diode is used as rectifier. Surprisingly it is giving ~ 4.9 V when no load and about 430mA to an old 3.8V torch bulb, almost ...
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2answers
629 views

Why does this Bridge Rectifier claim to have no [Diode] Forward Voltage drop

I was, "OK, this is feasible"... But then I traced how it worked and it simply blocked current through Drain and Source when a P and N pair are reverse biased; then when the other P and N pair are ...
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1answer
65 views

LTSpice Full Wave Controlled Rectifier Erronous SCR Breakover

I'm attempting to simulate a full wave SCR rectifier: However it is not behaving correctly. In my setup V3 controls one pair of SCRs, and V4 controls the other. All the math on the side is just for ...
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0answers
52 views

Will “dimmable” 120VAC LED bulbs work on half-wave-rectified power? [closed]

My stove's vent hood has a pair of 120VAC 50W MR16s with GU10 bases, e.g. these halogen bulbs. These are some of the last incandescent bulbs in my house, and I'd like to replace them with something ...
0
votes
1answer
76 views

How can an active rectifier block current?

This is a 2 part question for my understand about how an MOSFET/IGBT based active rectifier controls current. 1) Assuming a 3 phase active front end to a DC bus, and some huge load on the DC bus ...
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1answer
43 views

Calculating phase currents of an automotive alternator

I have an automotive (3-phase) alternator with peak rated output of 150A at 14V (after rectification, of course). How can I determine phase (AC) currents in this situation?
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votes
4answers
546 views

Is a linear voltage regulator necessary in AC to DC?

I was doing research on AC to DC power supplies and I came across a lot of schematics that use regulators like the one below: credit: ...
4
votes
2answers
152 views

Storing the the charge from a MOSFET Bridge Rectifier

I am using the following MOSFET Bridge to harvest AC bursts that coming off from a electromagnetic transducer. Infront of this circuit is a Super capasitor I have placed. I read the following on a ...
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vote
1answer
62 views

Are pins of WOG bridge package numbered?

The WOG package used for a diode bridge looks like this: As I'm preparing a PCB layout footprint for this device, I need to assign pin numbers. Those pin numbers map to the schematic and ensure the ...