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Topic: what would you do with relays? (Read 1 time) previous topic - next topic


So i scored a couple hundred NOS "GI CLARE HRB1A1512" relays. I haven't been able to find a data sheet on them yet but i am pretty sure they are 1 amp 12vdc.
what would you do with a bunch of relays?


Relay-based computer, of course. Hope you have enough relays for the memory (seriously, most people who have made relay computers cheat and use regular IC-based memory).
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May 25, 2010, 01:04 am Last Edit: May 25, 2010, 01:04 am by Osgeld Reason: 1
no, its quite normal


but with only 200 you might be limited to calculator, or one heck of a light show


yeah im watching videos now on relay computers, pretty cool. this video of an addition/subtraction machine seems pretty simple.http://www.youtube.com/watch?v=aDRlKpLc-9E&feature=player_embedded


Whoa, that computer is awesome.  Are you sure it's not a relay drum machine?  Cause that thing is definitely making rhythms!


totally! all they sequenced clacking got me thinking about making some sort of rhythm machine/light show.


May 25, 2010, 05:23 am Last Edit: May 25, 2010, 05:23 am by Osgeld Reason: 1
rig one up with to switch via an arduino, and see how fast it can oscillate, maybe you could do buzzing harmonics  8-)


Wow, impressive relay computer!

Or, you could go for someting simpler and make the relay "blink sketch" :P

I don't know the bulb specs, and most likely the other components specs (that is, R and C) would have to be experimentally determined to make it work with your relays... maybe. I made this a long time ago, and probably needed a bit more than 12V to make it work, since I marked it 13-16V.


There was a transparent pinball machine at Maker Faire.  It's internal logic appeared to be based entirely on assorted types of relays...


I guess you've got to be careful with your timing when designing logic circuits with relays, otherwise you'd end up with relay race conditions.

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oh yeah, i think i saw that pinball machine there. i was starting to wonder who all went out to the bay area maker faire. i wish i took more pictures.

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