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mdf



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# 213998 23-Apr-2017 12:17
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I spent the morning tidying out the garage getting distracted and pulling apart a couple of old laser printers. I was mainly after the aluminium for a couple of projects, but also have a nice new stash of machine screws, cogs and a couple of stepper motors.


The electronic componentry is well beyond anything I might do with it, so free to a good geekzone home. I'm picking the PCBs are worthless, but some of the boards seem to have some nice capacitors and whatnot (that's a technical term I picked up from 5th form physics) for someone that knows what they are doing.


Would prefer pickup in Wellington, but happy to ship (within reason) for the cost of a donation to OMGTech or a new Geekzone subscription (your choice).






 


 


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  # 1769224 23-Apr-2017 13:49
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May be better in Offers / Wanted forum


Stu

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  # 1769225 23-Apr-2017 13:51
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Moved to the correct sub-forum.




Keep calm, and carry on posting.

 

 

 

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  # 1769231 23-Apr-2017 14:13
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Hardly anything you can find inside printers you can use in fun projects in my experience. Even cooling fans are not 12V.

 

Check 3 black relays - if not 12V - also of no use. Otherwise - possible home automation / car application.

 

Unwind few coils and keep the copper wire. That comes handy sometimes in the garden or in DIY projects.

 

 


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  # 1769295 23-Apr-2017 18:13
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I pull big high end ones apart all the time. Full of big steppers and perfect ground steel rods. The ally heat sinks are high quality and good for melting. But yeah, most have really high end 24v power supplies which are hard to find a use for. If you find a good 12v you could make a bench top power supply.


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  # 1769299 23-Apr-2017 18:21
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24v is way more use than 12v for most things.





Richard rich.ms

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  # 1769300 23-Apr-2017 18:22
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If you have enough of them, a lot of scrap metal dealers will pay you for PCBs.


mdf



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  # 1769334 23-Apr-2017 19:25
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Good to know, thanks guys. I pulled apart two laser printers today. Next week is a couple of inkjets. Really aiming for stepper motors and some nice rod/bar stock, but I'll keep the other bits and pieces too.


 
 
 
 


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  # 1769369 23-Apr-2017 20:44

Power supply circuit boards probably best for "ratting" components from. As it would have a bridge rectifier, various inductors, at least 1 high current high speed diode, sometime opto isolators, sometimes the heatsinked 3 terminal "transistors" are actually fixed voltage regulators. So they can be repurposed for making your own linear type regulated power supplies. And plenty of through hole resistors, so saves you from having to drive to Jaycar just to get 1 or 2 resistors.

 

Although old ATX computer power supplies are even better for ratting parts from. And they are also handy for using as a simple short circuit proof bench power supply. As they output 12V, 5V, 3.3V, -12V, and a 2nd 5V line that is always on. To make them switch on, connect the wire called PS_ON to one of the 0V wires.






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  # 1769374 23-Apr-2017 20:52
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Inkjets I have pulled apart have just had a DC motor to move the head back and forth and a strip with a pattern on it that it reads to know where it is. The paper feed mechanism didnt seem to be a normal stepper, not sure how that worked.





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  # 1770475 26-Apr-2017 09:23
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Those boards could be used to test your de-soldering / soldering skills on, especially for the surface mount parts.

 

Capacitors,  - I wouldn't trust, especially those on the rectified incoming 230v. Electrolytic caps go dry, loose value, explode, leak.

 

I used to scavenge PCB's many years ago, but one can never be too sure about the provenance of the components, and if something doesn't work as expected, you start second-guessing the parts you have scavenged.





My thoughts are no longer my own and is probably representative of our media-controlled government


mdf



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  # 1770651 26-Apr-2017 14:12
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SepticSceptic:

 

Those boards could be used to test your de-soldering / soldering skills on, especially for the surface mount parts.

 

 

Now that, sir, is an excellent idea! 


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