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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Regarding bridge rectifier verification

I am trying to verify my bridge rectifier for proper functionality. It can be depicted by the above diagram. When I place the positive terminal of my voltmeter (switched to diode mode) on one of the ...
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2answers
337 views

Why do we rectify then invert current in induction heaters?

I was trying to build a simple zone refining prototype, so I thought of How to simplifying induction heater for zone refining? I throughly read What does a beginner need to know to build an inductive ...
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67 views

Under what conditions will the following circuit work?

The following circuit that only has a single supply wire and not grounded (see below). Under what condition can this circuit be made to work (supply a small amount of rectified current, say 5mA). In ...
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1answer
67 views

What happens when you rectify phase cut current?

Forgive the simplicity of the question, since I'm not a professional, just a tinker with a soldering iron. Just dancing with the idea in my head, I believe that if I rectify a current that's been ...
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1answer
74 views

What happened to my second half cycle of my half wave rectifier?

When I'm doing a simple half-wave rectifier with the set-up as shown above (Note: Diode D2 is not connected) and connected terminal 5 and 4 with positive and negative terminal of oscilloscope, this ...
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2answers
393 views

My half wave rectifier graphic is wrong

Here is the circuit we used (BT169 thyristor): And this is the output: In theory it should be a straight line when AC source goes negative. The question is "Why does it go into the negative ...
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1answer
59 views

Transformerless rectification is giving out AC component [duplicate]

I want to convert 240V AC 50hz to 12V DC without transformer.I want the output (12V) to drive 25 white LEDs.The circuit is giving an output of ~14V DC.But the problem is that it is also giving out ...
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1answer
97 views

Is the output of a smoothed rectifier same as the DC output of a battery?

When rectifying an AC signal to DC through full wave rectification and smoothing using capacitors, is the output same as that of a DC battery?
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1answer
84 views

how to design a power supply with a supercapacitor

I'm ask to design a power supply unit which could change its voltage from 0 V to 20 V DC and its current to 0 A to 5 A. The maximum internal resistance of the unit is 1 kΩ. At the same time, it could ...
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2answers
62 views

why the PIV of full wave rectifier is 2vm

Peak inverse voltage (PIV) is the maximum voltage a diode can handle in reverse bias condition. Why does the PIV of the diodes in a full wave rectifier need to be 2×Vm? (where Vm is the peak ...
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1answer
39 views

Strange reading from rectifier

I am new here so sorry if i don't ask this question correctly. I am currently trying to test a bridge rectifier from jameco(part # 103000) I am applying a 60hZ wave from wave generator with 1V peak ...
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2answers
88 views

How to design capacitance value for a given full wave rectifier [duplicate]

I have been searching for design equations for 5v regulated power supply but unable to figure it out. Please check the below circuit diagram Could anyone explain me why 470uf ? why not 2uf? how can ...
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2answers
128 views

How does a bridge rectifier work exactly?

If this question was posted before, please let me know. I searched for "how does a bridge rectifier work" and did not find an answer. The part that I especially find confusing is when I have the ...
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1answer
64 views

Trying to understand flyback diodes and general diode orientation

Let's start with this: I know the top image is of a flyback diode. I also get that its purpose is to protect the power supply from a voltage spike when the electromagnet releases. So I've gotten ...
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0answers
15 views

B6 rectifier if one thyristor's control device is damaged

This one is a task from the last year's exam in electronics. I have absolutely no idea how to solve this. The task was: a B6-rectifier with thyristors, trigger angle 30°, but the control device of ...
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2answers
78 views

Why does a large filter capacitor draw large (peak) current?

In my book it says that in a diode rectifier the capacitor gets charged close to the peak of the ac voltage. Is it true the larger the (filter) capacitor the larger the peak current drawn and if so ...
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2answers
134 views

Precision high speed peak detector

As a follow-up to my previous question, where I seek to determine the amplitude of a 2 MHz sine wave, I've settled for an op amp based solution. To recall, my input has a maximum 240 mV amplitude -- ...
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2answers
65 views

How to adjust the offset of a full-wave precision rectifier?

I've made a full-wave precision rectifier with TL072, for a vu-meter, and the first 3 leds are ON without signal, because I have +15mV offset at rectifier output and the levels for leds are: led1=7mV, ...
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2answers
1k views

Half-wave diode rectifier - is textbook wrong?

I've noticed that in all resources on diodes and rectifiers, they show the output voltage as the positive half-wave of the input signal. However, that seems wrong. I understand that there's a voltage ...
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1answer
329 views

What is the maximum frequency a bridge rectifier can handle?

I was designing a basic power supply with frequency ranging from 50-60Hz and thought about using this bridge rectifier KBPC50005. I cant seem to understand the range of input frequencies it can take, ...
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1answer
64 views

Which precision rectifier should I use for a 60dB LM3915 Vu-meter?

I want to make a 60dB Vu-meter with two LM3915 chips. In the datasheet is recommended to use an external precision rectifier and they give two type of rectifiers: half-wave and full-wave. My problem ...
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0answers
111 views

Will this circuit work as a AC-DC-AC rectifier-inverter?

I'm pretty sure I'm missing one or more things from this circuit and can't figure out what (new to this)! The end goal is that an alternating current will come in, run through the rectifier, then ...
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4answers
388 views

Determining amplitude of a 2 MHz sine wave

I'm designing a class E resonant inverter at a switching frequency of approx. 2 MHz. I need to control the inverter so as to maintain a constant current at the load. My strategy would be to put a ...
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1answer
256 views

Connecting center-tapped transformer to earth ground; or, why am I being electrocuted?

Silly question here. I've wired up a full-wave rectifier using this dual-secondary transformer. If you want to check my wiring, I connected red-to-orange to "create" the center tap (I assume this is ...
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2answers
89 views

Full wave AC Voltmeter Vs True Rms Voltmeter

Does a full-wave rectification AC Voltmeter give the same indication as a true rms voltmeter when you measure a 50 Hz sine wave?what happens if the the sine wave is clipped by an inadequate ...
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97 views

RMS or effective ac voltage component of a full wave rectified sine (not filtered)

Ignoring the voltage drop on the diodes, for a full wave rectified DC,can I say that: 1) Vrms of the original AC = Vrms of the rectified DC. ( I have just flipped one polarity. Power is same) 2) ...
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1answer
95 views

Example circuit with an F12C20C dual rectifier?

I've salvaged a MOSPEC F12C20C Dual Power Rectifier from an old PSU. I've been looking for example circuits that would use this component, and an explanation of how it works but I've only found its ...
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1answer
174 views

SMPS Design Transformer Core Selection

I'm trying to construct an SMPS power supply with 230VAC at 50 Hz input and 5.6V/2.5A output. Here is the schematic: The design was optimized with EE19 core selected and I am expected to optimize ...
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53 views

The current and power factor in the Full wave rectifier

I have some questions and I hope you can help me. All he question is about a Full wave rectifier with smoothing capacitor. Why the supply current in is big ? and it is not good to have large peak ...
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2answers
156 views

effective voltage of a sine wave

I am looking for effective voltage values for calculating power in a AC sine wave supplied circuit with a resistor under 2 conditions : full wave rectification; half wave rectification. I have ...
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0answers
100 views

Bottle dynamo (bike generator) rectification and stabilization circuit for LED light

A friend of mine would like to convert her bottle dynamo (bike generator) to run a LED light. The light needs to stay on for maybe 90 secs when the bike is stopped, and needs to blink (using a ...
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2answers
119 views

Rectifier for 3A load [closed]

What kind of rectifier circuit would I need to build a 25-30V 3A power supply with an input voltage of 24V AC?
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83 views

Diode detector strange discharging

I am building a diode detector circuit in order to detect ASK signal with 125 KHz carrier frequency and 8 KHz data rate. However, I realized I would say a strange behaviour and discharging of ...
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1answer
172 views

AC-DC voltage doubler rectifier

I designed a 50 Watt voltage doubler rectifier with rated input 12 VAC and output 48 VDC. The circuit configuration and simulation result are presented in figure below. 2 unit IRFP460 power ...
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1answer
75 views

Connect a vibration motor to a headphone jack

I would like to solve the following problem: I have a a variometer-device for an RC plane. Its receiver has a standard 3.5 mm headphone jack that provides a beeping sounds to my headphones. I would ...
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2answers
301 views

Another 'What is this component?' question

I have looked through all the other 'what is this component' questions and have not found my component. I am looking for the component in the red box. It is from a rectifier circuit off a 1973 9.8 hp ...
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911 views

What's the purpose of the full wave diode bridge in this DC-DC power supply?

In the following power supply circuit, there is a full wave diode bridge (full wave rectifier?) after the DC Input. I can see how we need a full wave rectifier after an AC input, but why after a DC ...
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2answers
181 views

7809 Linear Voltage Regulator Outputs in Series

I'm building a linear power supply that converts 120VAC mains voltage into multiple 9VDC, isolated outputs. I'm using this transformer that has the proper primary winding and 8 secondaries that I'll ...
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2answers
98 views

Design help for my 1A variable power supply

In a 1A Variable Power Supply circuit given below is it possible to use a 2A transformer and 1A bridge diodes.
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102 views

Is it possible to calculate the load resistance in a full bridge rectifier when given only power, inductance, and input voltage?

I'm given a full bridge rectifier circuit with values for power, industance, and RMS input voltage: [P = 380 W, L = 85 uH, Vs = 115 V]. The question states to 'select' output resistance for a ...
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1answer
122 views

Selecting diodes for HV full bridge rectifier

I'm using a current-fed Royer self resonant circuit to generate 1kV DC output voltage. The transformer is producing a sine wave of 100kHz/2kVpp (Cap-Royer = 100nF). At the output of the transformer I ...
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3answers
180 views

Output of Inverting opamp with single supply

I have the following circuit I'm looking into (it's actually a section of a larger design) simulate this circuit – Schematic created using CircuitLab V1 has an input range of 0 to 4V. ...
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1answer
144 views

Tuning LED circuit so LED turns on at specific voltage

I am attempting to add a signal activity LED to my dummy load box. I have constructed the following circuit and so far it does what it is supposed to (lights an LED with signal applied and does not ...
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1answer
91 views

Fullwave rectifier theory

Why is it that in full wave rectifiers do you divide the secondary coil by half as stated in this book: (Source) What concept am I missing?
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3answers
177 views

Precision half wave rectifier

How does a precision half wave rectifier work? The one with a single diode. When the input goes positive, the output of the op-amp is a large positive signal which turns on the diode and completes ...
0
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1answer
106 views

Transfer function for six-pulse controlled rectifier

I need to determine the transfer function for a six-pulse bridge rectifier, implemented with thyristors. More precisely, I need to determine the relationship between the output voltage (pulse) and ...
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2answers
155 views

How to replace the rectangle(DIP) bridge rectifier with round one.

I want to make an AC dimmer and the circuit diagram from the instructables uses a bridge rectifier which is in DIP package and rectangle in shape and the rectifier which I have is round one, so how ...
0
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1answer
68 views

Center Tapped Full Wave Rectifier

What is the formula for Vdc of a Center tapped full wave rectifier? Is it 0.636*Vac - Vk (where Vk is the potential drop across a single diode. Assume both diodes ...
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2answers
103 views

Convert a ringing telephone voltage of 90V AC to 3.3V 1000mAh DC current so that it only triggers when the telephone is ringing?

How can I convert and step down a ringing telephone voltage of 90VAC current to 3.3V 1000mAh DC current so that it only triggers when the telephone is ringing? Bridge rectifier? Inductor? Step Down ...
13
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2answers
3k views

AC to DC without transformer. How does this thing work?

I disassembled a Chinese-made flashlight and found they use just capacitors to bring down the voltage instead of a transformer. They are using it to charge small lead-acid battery. My question is how ...