# Tagged Questions

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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### What is the advantage of using a center tapped transformer in a full wave rectifier circuit? [on hold]

A half wave rectifier doesn't use it, still it shows output.
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### Oscillation in Voltage Rectifier / Scaling Circuit

I am working on creating a circuit that will scale +/- 12v input to a unipolar 3.3v centered around 1.65v, in order to scale the kind of CV used in modular synthesis systems to work with the ADCs on ...
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### Using two isolated secondaries of different voltages to power one device

I'm making a simple 555 timer circuit to drive a flyback transformer. The 555 circuit controls an N-Channel mosfet which is what drives the flyback. I have an old receiver mains transformer that I ...
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### Convert 220V AC to give out TWO 12V DC 3 amps [closed]

I need an output of two 12 v dc 3amps , how can do it with a single transformer ? Well i am sorry for i framed the question badly! I have an appliance that need needs 12v 2amp for one component (...
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### How to avoid clipping of signal in case of rectification

When I use any of full wave rectifier, the signal level drops by the amount of n*Vf (0.7+0.7 ~ 1.4V in case of bridge rectifier and 0.7V in case of simple full wave rectifier) where n = no. of ...
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### Problem with capacitor after bridge rectifier

I wanted to make a simple power supply so I made a bridge rectifier with 4 diodes rated 6 amps, then I connected the bridge to a transformer (220 volts to 9 volts (measured 9.4 with voltmeter) 50 Hz) ...
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### Three phase rectification algorithm

Let's suppose we have a three phase rectifier like here: https://www.youtube.com/watch?v=V6ZWYFTELQA Now lets suppose we change diodes with transistors. Let's also put current probes on each of the ...
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### Can I use an LM324 voltage follower with a single supply to rectify an AC signal?

I have a question that is mostly related to voltage input common mode ranges. The LM324 should be able to go pretty close to it's negative rails, as a voltage follower would the common mode voltage ...
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### Capacitor bank for smoothing full-wave rectification output

I need some insight on the best way to set up the inductor-capacitor portion of our circuit. My goal is to smooth the output from our diode bridge which rectifies the AC current input into DC current. ...
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### How big does the Schottky Barrier or Band Offset have to be for a junction to be a diode?

Current rectification happens when there is a large Schottky Barrier or a large Conduction band offset (excluding cases such as tunnel diodes). My question is, how large (in electron volts) does the ...
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### Operating frequency of RD15VHF1 and 1N5822

I am currently building an inverter circuit and a rectifier circuit. I proposed to use RD15VHF1 and 1N5822 in the circuit because my target is to operate the circuit in the range 500kHz to 1.5MHz. In ...
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### Trouble with rectifying a pulse with a diode

I'm trying to obtain a pulse from a square-wave of a function generator. I thought it is an easy straightforward thing. So in this case the square-wave is +5V to -5V. I use a 1N4001 diode and a 220 ...
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### Charge a 6S Li-ion pack with a boost converter

Hi fellow makers and engineers, I'm trying to charge a 6S Li-ion battery pack (6 NCR18650B cells in series) using a rectified DC voltage of 16 Volts and boosting it to about 25.2V to charge the pack ...
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### 120v power supply section 220v adaptation

I'm building a very simple tube overdrive, power supply section of the schematic can be seen above. as you can see the circuit has been designed for 120v. I will be dealing with 220v instead of 120v, ...
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### calculate FFT based on an oscillogram

Hi, I'd like to understand the context in between an oscillogramm and the resulting FFT. My example is a full-wave rectifier and I am try to calculate some harmonics. Because the function is ...
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### Vgs and semi-active rectification

simulate this circuit – Schematic created using CircuitLab I'm new to the world of mosfets and am trying to learn them better. Would this rectifier IC be safe for input voltages of 24V if Vgs ...
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### Bridge Rectifier Attached to DC input

I was taking apart an old game-show buzzer system (like something they might use on Jeopardy) and I was confused by the a particular section of the circuit board: I'm pretty sure the circular ...
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### LC Filter for a Full Wave Bridge Rectifier?

According to what I've read on a few websites and PDFs (http://www.irjes.com/Papers/vol2-issue6/Version-1/E02064249.pdf is an example) using an inductor-capacitor filter to assist AC to DC ...
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### Low-voltage rectification

I have a 19kHz square wave line-level audio signal (~2Vpp) that I hope to rectify in order to drive an infrared LED at 38kHz. So far, I've been using a pair of LEDs, wired in parallel in opposite ...
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### 3-Phase Permanent Magnet Alternator with Regulator/Rectifier (SCR) Output Waveform

So I've been troubleshooting some electrical problems with a motorcycle charging system, and I need a little assistance understanding the output waveform: Per an article (which I don't have enough ...
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### Can I use barrier rectifier as a diode in bulk converter circuit?

I have this LC circuit which will work under 12V and quite high load (10-20A): The diode D1 must be a shottky diode but the only similar thing I have at the moment is actually 3-leg MBR3045CT ...
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### Wave rectification

I'm just a bit confused about what is actually happening when a wave goes up and down. It's a graph of voltage vs. time, so therefore wouldn't that mean the voltage was going up and down constantly? ...
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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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### 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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### 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 full-...
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### 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 ...
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### 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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### 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 https://www.quora.com/What-is-the-...
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### 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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### 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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### 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 ...
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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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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### 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 ...
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### 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. I'...
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### 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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### 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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### 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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### 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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### 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 ...