In the design/Idea phase: Relay Computer! - Electronic Circuits Projects Diagrams Free

**Krumlink** · 15th March 2008, 05:15 AM

I have been throwing around ideas, and I am glad to say that I am beginning the design phase of a Relay computer. I am researching memory storage and bit registry, and clocks too. I found a great page that will help me design my relay computer, and all I need now is a cheap source of a lot of relays. If you have any links to cheap relays, let me know asap!

Analog · 15th March 2008, 05:25 AM

Quote:

Originally Posted by Krumlink

I have been throwing around ideas, and I am glad to say that I am beginning the design phase of a Relay computer. I am researching memory storage and bit registry, and clocks too. I found a great page that will help me design my relay computer, and all I need now is a cheap source of a lot of relays. If you have any links to cheap relays, let me know asap!

Well, it would certainly help if you mentioned the voltage required for your relays..

That being said, this site has them for as cheap as $0.99/ea:

http://surpluscenter.com/sort.asp?nu...08031500223938

Pommie · 15th March 2008, 05:27 AM

You mean like this?

That looks like a bed in the foreground. I know what my wife would say if I built something like that in our bedroom.

Mike.

**Krumlink** · 15th March 2008, 05:28 AM

Yes that would help I suppose

I prefer to have a operating voltage between 5VDC and 12VDC.

**Krumlink** · 15th March 2008, 05:28 AM

Quote:

Originally Posted by Pommie

You mean like this?

That looks like a bed in the foreground. I know what my wife would say if I built something like that in our bedroom.

Mike.

Yes, but not quite that elaborate. I read the specs on that thing and WOW!

Bob Scott · 15th March 2008, 05:29 AM

It's quite obvious that the bedroom belongs to a single male who is doomed to remain that way for a long long time.

**Krumlink** · 15th March 2008, 05:30 AM

lucky me

http://www.goldmine-elec-products.co...p?number=G9473

Marks256 · 15th March 2008, 01:34 PM

Here you go, krummy: http://www.youtube.com/watch?v=n3wPBcmSb2U

EDIT: Oh... Never mind. It was linked to on harry's page.

Papabravo · 15th March 2008, 02:11 PM

I have one suggestion. Consider carefully your power requirements. A quick survey of signal relays from NEC and Omron reveals that each non-latching relay will consume between 150 and 500 milliwatts. A handfull of relays could easily require a rather large power supply. When I was a young engineer I heard tell of a 5V 3600 A supply that was used for such a purpose. I never knew weather to believe it or not.

Driving a single non-latching relay requires a minimum of one transistor, one diode, and one or two resistors.

A single coil latching relay requires a more complicated bridge driver, but consumes much lower power when it is not switching. This is very similar to the behavior of a CMOS output.

BTW in the NEC literature they mention that at elevated temperatures there will be outgassing that has the possibility to corrode the contacts. Sounds yuckey.

Good luck and have fun

Roff · 15th March 2008, 02:17 PM

Quote:

Originally Posted by Bob Scott

It's quite obvious that the bedroom belongs to a single male who is doomed to remain that way for a long long time.

Well, it appears that he is in fact married, or was at one time (perhaps before he put the clacking machine in the bedroom).

**3v0** · 15th March 2008, 04:11 PM

Perhaps you will have a better chance of success if you scale it back to start with. Maybe an adder.

JimB · 15th March 2008, 04:36 PM

Quote:

Originally Posted by Roff

Well, it appears that he is in fact married, or was at one time (perhaps before he put the clacking machine in the bedroom).

Or did he put the computer in the bedroom after the clacking machine went back to live with her mother.

JimB

Pommie · 15th March 2008, 04:42 PM

Quote:

Originally Posted by JimB

Or did he put the computer in the bedroom after the clacking machine went back to live with her mother.

JimB

Lol, that could well be the answer.

Mike.

**Krumlink** · 15th March 2008, 06:33 PM

Quote:

Originally Posted by 3v0

Perhaps you will have a better chance of success if you scale it back to start with. Maybe an adder.

Of course! I am looking into creating a clock counter (out of relays) for the fininte state machine. This has helped me a lot, even though it is kinda long and layed out a tad bit too much.

http://web.cecs.pdx.edu/~harry/Relay/RelayTalk.pdf

I was going to start with the clock first, then on to the 1 bit adder, then the 8 bit adder, and so on.

picbits · 15th March 2008, 08:08 PM

I think that after he built the "clicking thing", his missus made him make the choice .......

"Its either me or the machine."

By the looks of things he chose the machine and moved into the spare room.

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15th March 2008, 05:15 AM	(permalink)
Krumlink	In the design/Idea phase: Relay Computer! I have been throwing around ideas, and I am glad to say that I am beginning the design phase of a Relay computer. I am researching memory storage and bit registry, and clocks too. I found a great page that will help me design my relay computer, and all I need now is a cheap source of a lot of relays. If you have any links to cheap relays, let me know asap! __________________ MechTronics World of Warcraft is a disease

15th March 2008, 05:27 AM	(permalink)
Pommie	You mean like this? That looks like a bed in the foreground. I know what my wife would say if I built something like that in our bedroom. Mike.

15th March 2008, 05:28 AM	(permalink)
Krumlink	Yes that would help I suppose I prefer to have a operating voltage between 5VDC and 12VDC. __________________ MechTronics World of Warcraft is a disease

15th March 2008, 05:29 AM	(permalink)
Bob Scott	It's quite obvious that the bedroom belongs to a single male who is doomed to remain that way for a long long time.

15th March 2008, 05:30 AM	(permalink)
Krumlink	lucky me http://www.goldmine-elec-products.co...p?number=G9473 __________________ MechTronics World of Warcraft is a disease

15th March 2008, 01:34 PM	(permalink)
Marks256	Here you go, krummy: http://www.youtube.com/watch?v=n3wPBcmSb2U EDIT: Oh... Never mind. It was linked to on harry's page. __________________ There is no "I" in "team", unless Apple makes it... Then it would be iTeam.

15th March 2008, 02:11 PM	(permalink)
Papabravo	I have one suggestion. Consider carefully your power requirements. A quick survey of signal relays from NEC and Omron reveals that each non-latching relay will consume between 150 and 500 milliwatts. A handfull of relays could easily require a rather large power supply. When I was a young engineer I heard tell of a 5V 3600 A supply that was used for such a purpose. I never knew weather to believe it or not. Driving a single non-latching relay requires a minimum of one transistor, one diode, and one or two resistors. A single coil latching relay requires a more complicated bridge driver, but consumes much lower power when it is not switching. This is very similar to the behavior of a CMOS output. BTW in the NEC literature they mention that at elevated temperatures there will be outgassing that has the possibility to corrode the contacts. Sounds yuckey. Good luck and have fun __________________ We never have time to do it right; but we always have time to do it over.

15th March 2008, 04:11 PM	(permalink)
3v0	Perhaps you will have a better chance of success if you scale it back to start with. Maybe an adder. __________________ search engine for electronic parts Junebug USB PIC programmer kit., USB Bit Wacker, Homepage The 15 Minute Printed Circuit Board! (+drill time)

15th March 2008, 08:08 PM	(permalink)
picbits	I think that after he built the "clicking thing", his missus made him make the choice ....... "Its either me or the machine." By the looks of things he chose the machine and moved into the spare room.