The rectangle type usually have the AC come in the center pins and the DC out of the outer pins, with the positive towards the beveled corner. It can be simply 4 diodes soldered on the circuit board, or it can be an integrated circuit taking the form of an upright rectangle with a beveled corner, or a square unit that lays flat on the board. There are 3 popular diode arrangements to make those bridges. Well, it is usually an arrangement of 4 diodes that will act like traffic cops, directing all the electrons going in one direction to one wire (the negative, normally black wire), do their loop on the circuit, and come back through another wire (the positive, normally red wire). Ok, so now I know that I need a bridge rectifier, but what is it exactly?
Just remember that it's part of the AC wiring. I won't talk about it either in the following steps. If you dig a bit deeper, you can find a micro switch that cuts power to the unit if the bin is removed. Note : the actual voltage from the outlets in your home may vary. We now also know that we need a way to convert 120V AC to 120V DC.Įnter the magical world of rectifier bridges! The fact that this is a 120V motor can be considered a good thing, since no transformer will be needed in the new circuit. The other two are blue, and from what I can tell, they are probably from a sensor of sorts, since there was an overload LED on the cover. In this case it's a 120V DC motor. Note that there are 4 wires coming out of the motor,and two of those are obviously the DC power wires since they are black and red. When taking out the motor, check for a sticker with the specs. correct me if I'm wrong, but nonetheless. I have my doubts about reversible AC motors. I of course kept the board for any salvageable components in a future project.Īpparently, this shredder came in a version with an AC motor, and a version with a DC motor. In my case, I had no clue as to what was broken, so I just removed the circuit board and cut the wires as close to the board as possible, in order to give me some room to move later on. Soldering iron and solder - recommended, but it's possible to do without.ĭremel - again, recommended, but it's possible to use other cutting tools Insulator for some connections - heat shrink, electrical tape, marettes.Ĭrazy long philips screwdriver - I used an 8 inch #2, but it was tight, so maybe a #1 would work better On-off switch - optional if your DPDT switch has an off position let's say that I hadn't quite grasped the mindset of photographing for instructables yet.
The downside is that this project was done way back in February 2010, and the first steps were not documented with photos. This is my first published instructable, yay! The simple fix is to make a basic circuit that will run the motor forwards and backwards. I always wanted to get a shredder to dispose of sensitive documents, so when I stumbled on an ad for a broken shredder to give away, I jumped on the occasion!īasically, the electronics inside were shot, but the motor was in perfect working order. I expect years of use from the shredder for my home.Here is one way to inexpensively bring a shredder into your home office! It is plastic but it is sturdy and the motor housing is secure and does not expose any blades. This shredder (and any other MailMate models) is well worth the money. I empty shredded paper from the tray into my paper recycle box that is how secure shredded paper comes out of the shredder blades. The handle has a solid feel, and the tray is sturdy and easy to pull out from the shredder. The handle on the front, just below the function buttons, is attached to the tray that holds the shredded material. I am confident anything I shred is securely shredded. I like the bits of paper from the shredder (approx. C'mon folks, it is a shredder with a powerful is going to make noise. The noise from the shredder blades working is not unbearable, unlike some complainers of MailMate shredders. The shredder turns off automatically after a minute or two. The shredder has 3 buttons on the top cover.power button, forward button, and reverse button. Staples are no match for the shredder blades. It shreds paper, credit cards, cds & dvds.
It sits nicely on a counter, desk, or stand. Its shape and size prevent the shredder from toppling over. The shredder is a squatty thing which is good. Unpacking the shredder from the box, it felt a bit heavy due to the motor housing but it felt solid.
After reading reviews on several home/desktop shredders, I settled on this baby.
0 kommentar(er)
