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Uglytech - The cardboard relay

After talking with Jez - Morning.Star about coils and magnets, I decided to try to roll my own relay using cardboard, paper and fasteners.

dr-cockroachDr. Cockroach
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The construction of a SPDT relay using basic construction materials. Cardboard, paper, paper fasteners and household castoffs a la the cardboard computer IO. This project is to prove to me that if all else fails in our world that I and others can roll our own electronic and electrical components. It is ugly to be sure and can use more R&D but even in a raw state, it works very well. I was also inspired to build this after following the project Relayreprap.

Man this relay is ugly but it works.

  • 1 × Broad head nail
  • 1 × Enamaled wire
  • 1 × Cardboard
  • 1 × Cardstock
  • 3 × Brass plated paper fasteners

View all 6 components

  • Time to start making relays - March 15, 2018

    Dr. Cockroach • 03/15/2018 at 23:33 • 3 comments

    Looks like I might have a use for relays with my #The Cardboard Computer - IO is my name project after all.   I am looking into ways to interface IOs output to a converted typewriter and need isolation while still using materials/parts that are on hand here in my secret lab :-) Need 16 SPST relays, just need to get the coil current demands down to a manageable level.

    Here is the coil for relay number 2. Using double thickness of cardboard at each end and turned 90 deg. for strength.


    Here is the result the morning of March 21, 2018...

    The counter weights for breaking the contact will be replaced by a spring or rubber band. Better core material is on the horizon.

    As of this afternoon, IO and the printer both are using the relay as isolation and working well.

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Horst Schlawutzke wrote 08/06/2017 at 16:20 • point

my vote you have
;)

  Are you sure? yes | no

Dr. Cockroach wrote 08/06/2017 at 18:05 • point

Thank you Horst. As rough as this construction is, it still works months later without needing any adjustments :-)

  Are you sure? yes | no

David H Haffner Sr wrote 04/29/2017 at 20:31 • point

Ok, so how are U going to interface this with the main frame?

  Are you sure? yes | no

Yann Guidon / YGDES wrote 04/29/2017 at 20:37 • point

Mark will rip his house's electrical wiring to get enough wires.

Let's hope it's enough.

  Are you sure? yes | no

David H Haffner Sr wrote 04/29/2017 at 20:38 • point

Haha, you know that's not too far from the truth :)

  Are you sure? yes | no

Dr. Cockroach wrote 04/30/2017 at 19:49 • point

Not far from the truth Yann :-) I plan on treating the panel as ROM and still need to wire up the panel read logic. Each pad is one nibble and should track with the PC. Jez has recommended that I could try wiring it as a stack and shift four bits as needed for reading so could go either way :-)

  Are you sure? yes | no

Dr. Cockroach wrote 08/06/2017 at 18:10 • point

Sorry for the loooooooooooong delay,  not sure if the relay will find a use on IO. I might find a place for it later :-)

  Are you sure? yes | no

Dr. Cockroach wrote 03/19/2018 at 00:50 • point

Working on that issue at this moment :-)

  Are you sure? yes | no

Yann Guidon / YGDES wrote 04/25/2017 at 18:32 • point

You must be Mc Guyver's father...

  Are you sure? yes | no

Dr. Cockroach wrote 04/25/2017 at 19:03 • point

Shhhh, No one knows :-)

  Are you sure? yes | no

Yann Guidon / YGDES wrote 04/25/2017 at 19:12 • point

So you cheated and you jumped out of the boat after the end of this episode ?

  Are you sure? yes | no

Dr. Cockroach wrote 04/25/2017 at 16:12 • point

I will be getting a video up later today :-)

  Are you sure? yes | no

Starhawk wrote 04/25/2017 at 15:15 • point

I'll just leave this here --> https://hackaday.io/project/11914-relayreprap

;)

  Are you sure? yes | no

Dr. Cockroach wrote 04/25/2017 at 15:38 • point

Oh yes, I had already liked and followed the Reprap relay :-) thats one very well made relay :-)

  Are you sure? yes | no

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