1. Apr 2, 2012

### CosB

This is only my second time using a breadboard, so bear with me. I have 4 resistors(black with silver stripe) and one small DC rotating motor. My goal is to get the DC motor to spin, yet I dont understand the diagram that I have including in the posting. Any advice would definitely be appreciated!

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2. Apr 2, 2012

### Staff: Mentor

The diagram you posted has nothing to do with a motor. The symbol on the left represents an AC voltage source (like the AC Mains), the 4 diodes are a full-wave rectifier, and the output capacitor helps to smooth the ripples in the rectified output to give you a moderately smooth DC voltage.

3. Apr 2, 2012

### CosB

I was told that the place where it says C(subscript)L is where I'm suppose to hook in the motor, because that is the location where both currents are flowing in the same direction( maybe Im completely wrong, which is a constant occurance lol) I guess what i should have asked was, what would this diagram look like on a breadboard.

4. Apr 2, 2012

### Staff: Mentor

Well, the output capacitor has a mostly DC voltage on it, so you could hook your DC motor in parallel with it to power it. What is the output voltage? Does it say in your breadboard kit? Is there a 12V transformer and the rectifier as a building block in your breadboard kit? Can you post a picture of what all this looks like?

5. Apr 2, 2012

### CosB

Yes I can post a picture of everything. For my assignment, all i have to use is one small DC motor, 4 diodes, solderless bb, then just extra enameled copper wire.

As for the 12V transformer as a building block in my bb, that i am not sure of.

Sorry if i seem like i dont have a grasp on the wiring, im a first year physics student in college so this is brand spanking new to me lol

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6. Apr 2, 2012

### Averagesupernova

The diode bridge (yes, those are diodes, not resistors that are black with sliver stripes) are not hooked correctly. The silver stripes are what is called the cathode end of the diode. The cathodes in the schematic (not the pointy end) are pointing in more or less the same direction. In other words, no diode in the schematic points west at all. They all point in an easterly direction. Your breadboard is not wired this way.

7. Apr 2, 2012

### CosB

Hey, i actually caught the diode mistake right after i posted the picture! But yes, i have flipped them all to be pointing in an easterly direction now. Glad you saw it and pointed it out!

8. Apr 2, 2012

### CosB

After fixing up the diode direction, here is what i have. (note) the pink wire in the middle is just a reference for where ill be placing a 1-10kOhm resistor. The upper right hand corner shows 2 wires going out of the picture which are attached to a DC motor. The other 2 wires exiting the pic to the left are going to my power source. Please lemme me know if i should correct anything (if you cant see it, ill try to get another photo)

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