Making PCBs and Waffles

waffle

The toner transfer method of fabricating PCBs is a staple in every maker’s toolbox. Usually, tutorials for this method of making PCBs rely on a clothes iron or laminating machine. They work perfectly well, but with both of these methods (sans high-end laminators), you’re only heating one side of the board at a time, making perfect double-sided PCBs somewhat of a challenge.

[Mark] just came up with an interesting solution to this problem. A waffle iron PCB press. Technically, [Mark] is using his ‘grill and waffle baker’ as a two-sided griddle, with a few aluminum plates sandwiching the copper board for good thermal conduction.

After a whole lot of trial and error, [Mark] eventually got a good transfer onto a piece of copper clad board. Now that he has the process dialed in, it should be a snap to replicate his results with a new project and a new PCB design.

Comments

  1. Andreas Hoe says:

    Nice idea,
    I tried it several times but I never got satisfying results. It locked similar to his “Experiment #8″, no mater how careful I was at any point the toner didn’t stick to the pcb.
    Over all the photo expose method is much reliable and not so expensive.
    Maybe I give the toner transfer another chance if I buy a new printer.

  2. aztraph says:

    LOL! I just picked up one of those 2 weeks ago at a garage sale. Guess I know what I’m gonna be doing with it.

  3. robomonkey says:

    I tried this while doing some double sided boards for opto isloation a couple years back. couldn’t get it to work (without major changes to the waffle iron I took from home — DW wouldn’t like it coming home in pieces). I see one at a garage sale, I’m doing the same thing aztraph is….

  4. robomonkey says:

    read his blog. He should try overhead projector sheets. I never have the rub off problems with that. I pass it through the laser printer 2 to 3 times to get a good thick layering of toner.

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