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How to Build a Simple Bridge Rectifier?
In fact, it is very easy to build a bridge rectifier by yourself through the following simple steps.
1. Take 4 rectifier diodes (such as the 1N4007 rectifier diodes).
2. Pick two diodes, make a cross of their two ends marked with the white bands, twist them together tightly, solder the joint and cut off the protruding ends.
3. Just as above do it for the remaining two diodes with their ends having no bands for this time.
4. Now you have two sets of diode assemblies, simply twist and solder their free ends as shown in the figure.
5. Your bridge rectifier is ready.
6. The ends with the bands is the positive, the ends without the bands is the negative and the other two common ends are for the AC input supply.