tiny transformers

Jul 10, 2013 12 Replies

Coilcraft LPR4012, 1:3, 2 uH primary.



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I was sort of shocked to see how they terminated the leads.



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I'm going to breadboard my flyback supply, so I asked my production guy if he could slice a piece of FR4, and solder paste/reflow. He went wild with our new machining center and made me some adapters.



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I'd feel better with a dab of epoxy under the center, in production.


John Larkin Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers and controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation

Seen it before. I always wish they'd spring for 0.050" extra length of copper so it would stick out under the corners and could thus be visually inspected.

Don't remember it from the tour, do you guys have an LPKF machine?

Or just a Chinese tar blob over the whole thang :-)

Regards, Joerg http://www.analogconsultants.com/

Whoa. Gnar-leeee.

Yup. Frankenstein felt better when he bolted the monster's head on, too. ;) (*)

Cheers

Phil Hobbs

(*)See "The Far Side".

Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 USA +1 845 480 2058 hobbs at electrooptical dot net http://electrooptical.net

No, we recently got a Tormach machining center thing.

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It's really nice and wasn't ghastly expensive. We got it for real machining, but it does engraving and stuff like pcb's, too. Now we need to chuck a laser into it and cut vinyl labels.

I gave the old Jet mill to Noisebridge.

John Larkin Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers and controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation

Neat. Not sure how (or whether ...) they passed EMC with that open cable motherboard in the electrical box, but a nice machine.

You could open a side business, making trophies for sports events. A former co-worker did that and said it's quite profitable.

Way to go. If we don't support the next generation, who will? I still have to figure out how to rewire a scope. A school here needs a portable (as in no lower back pain) analog scope. I'd give them mine but it has a dedicated keying cable and runs on 230V here, which the school doesn't have.

Regards, Joerg http://www.analogconsultants.com/

Does he do politician's heads, too?

That would have no effect.

Cheers

Phil Hobbs

Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 USA +1 845 480 2058 hobbs at electrooptical dot net http://electrooptical.net

They could add a copper sticker to the central bottom of the part, like the stained-glass copper tape stuff, just a little circle. That could be soldered down and anchor the part.

John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators

  • Looks like spot welding..

Like BrylCream, a little dab will do you..

To have their heads on straight? :)

I use the inductor version of the same package. They solder very well (hand), Never had a termination failure in approximately 500 pcs.

Boris

Which face do you want on the front?

Paul Hovnanian mailto:Paul@Hovnanian.com ------------------------------------------------------------------ A noble spirit embiggens the smallest man.

Does it really matter? They both tell lies. :(

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