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how to make a bridge (full wave) rectifier with 4 diodes


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The video shows how to make a bridge (full wave) rectifier with 4 diodes. The flipped circuit is (of course) nothing new, but sometimes this insight can help when you read schematics. The + and - from the circuit "float", as long as there is no connection to ground. The choice which potential must be on ground ( + or -) is given by the properties from the electronic components and the electronic circuit. This is e.g. explained in my book "Schematics 2, audio amplifiers and loudspeaker boxes" (author Ko Tilman, ISBN 978-1-4475-7336-4). The efficiency from the bridge rectifier is good, all the energy from the AC transformer can be pulled out because both parts ( + and -) of the sine wave are rectified. The hum level is rather low, though still a problem for many audio circuits. A filter capacitor from 4700 uF is often used and gives (in many/most cases) enough suppression of hum. More info about home brew power supplies and hum suppression in my book "Schematics 1". It is easy to make a bridge rectifier yourself with 4 identical diodes. When you bend them in the showed shape they can be mounted on a small piece of aluminum (heatsink), glue them to the aluminum with polyester resin, mixed with plaster, and hardener. This has sufficient qualities to drain the heat to the aluminum.

Canal: Science & Technology
Subido: 05/10/11 a las 2:43 pm
Autor: radiofun232

Duración: 05:01
Valoración: 4.769231
Vistas: 15943

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Ultimos comentarios:
radiofun232 (el 13/04/13 a las 4:22 am)
Works good, I am sure.
Lechon Thomas (el 12/04/13 a las 2:02 pm)
Thx bro, I used this to attach to my solar panel/CPUfan wind generator/hand crank usb charger :D
radiofun232 (el 19/03/13 a las 4:53 pm)
I don't know exactly what you mean.Current starts to flow when a load is connected to the bridge rectifier (a lamp or so). On one half of the sine wave 2 diodes conduct, on the other half of the sine wave the other 2 diodes conduct.
balakrishnakanuru (el 18/03/13 a las 9:30 pm)
is there any curren flow through neutral at -ve half cycles? In ac
radiofun232 (el 04/03/13 a las 10:48 am)
You are welcome, I hope it was helpful.
John Donaghan (el 04/03/13 a las 10:01 am)
Thank you!
radiofun232 (el 28/11/12 a las 3:03 am)
Thanks. 
Haydn Samuels (el 27/11/12 a las 12:36 pm)
Very good and informative enjoyed this
radiofun232 (el 09/11/12 a las 3:21 am)
I think this is possibe, thoug (in the Netherlands) our bicycle dynamo does not deliver 6 Volt at 2 Ampere, perhaps 6 Volt at 0,5 Ampere. Mount a diode in series to the battery pack to prevent the pack to be drained out when the dynamo is not in use.In fact measurements must be done to be sure that there is a charge current at speed x.
TexasCCRN (el 08/11/12 a las 7:42 pm)
Also may need a resistor to prevent from over draw on the two small generators (output: 6v and 2 amps at there best). I believe that the highest voltage attained by my 7.2 volt battery pack will be 6 volts I also need to set up a resistor or capacitor to prevent over charge of the battery pack.

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