Gruber
HobbyMasters
M.L. Toys
KidsWheels
Gruber
HobbyMasters
M.L. Toys
KidsWheels
HobbyMasters M.L. Toys
Gruber
KidsWheels
This is a tutorial section. find out how motors, relays, flashers, LED's work.
DO NOT POST HERE, UNLESS ITS A TUTORIAL
User avatar
By CJB
#2643
Short and sweet and to the point here...

A Diode bridge is a group of 4 diodes that can take AC or DC of alternating polarity and convert it into constant DC power.

This device allows us to tap into the wires headed to the motors and get a dedicated + and - regardless of the position of the Forward/Reverse shifter. As we know, the wires to the motors change polarity (which one is + and -) in forward and reverse. This is handy if you wish to have something operate only when the motors are running.

The best part is, even though the name is somewhat intimidating, it's super easy to build.

ImageImage from Wikipedia

One of my quick and dirty diagrams:
Untitled-1.jpg
User avatar
By gameboy
#2663
since your doing this, you might want to include diode size and wattages for those that dont know... hint, hint... like me :D
User avatar
By gameboy
#2664
since your doing this, you might want to include diode size and wattages for those that dont know... hint, hint... like me :D
User avatar
By CJB
#2670
gameboy wrote:since your doing this, you might want to include diode size and wattages for those that dont know... hint, hint... like me :D


Very well.

Diode size will vary depending on the load you're running, and your operating voltage.

A few common diodes that can be used:

1N4001 - 1A average rectified output current, 50v reverse voltage rating.
6A05 - 6A average rectified output current, 50v reverse voltage rating.
10A01 - 10A average rectified output current, 50v reverse voltage rating.

In our application, you shouldn't need more than a 50v peak reverse rating, but you can get much higher voltage ratings. 1N4007 for example is rated at 1000Vr.
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