Solid State Relay Board Options

[Steve_R]

Hello Steve,

Do you have any left, and has the price point come down ?

I live in so cal so shipping should not be a big deal

Yep, I still have some left and, sorry, the price has not come down.

BTW, I'll pay for the shipping.

Steve

[Zimms]

These are beautiful! Worth every cent.

[JeffBowlsby]

Drooling over this, I have some observations and questions:

* This board would not work for 914s with a rear window defroster
* This board would not work for the 1972-only 914s that use pin 3 of the 12-pin connector for an oil temp sender circuit (to the dash gauge)
* Why the difference in the slotted/Phillips screws on the corners of each relay? Are those screws are ready power sources in the engine bay?
* Would you consider making a kit with just the base and parts list/instructions available?

[Steve_R]

Drooling over this, I have some observations and questions:

* This board would not work for 914s with a rear window defroster
* This board would not work for the 1972-only 914s that use pin 3 of the 12-pin connector for an oil temp sender circuit (to the dash gauge)
* Why the difference in the slotted/Phillips screws on the corners of each relay? Are those screws are ready power sources in the engine bay?
* Would you consider making a kit with just the base and parts list/instructions available?

Hi Jeff,
* This board would not work for 914s with a rear window defroster .Yep, there was only enough room for 3 solid state relays. I read somewhere that only about 5% of 914 have a rear window defroster. Is this true?

* This board would not work for the 1972-only 914s that use pin 3 of the 12-pin connector for an oil temp sender circuit (to the dash gauge)
Good point. My car is a 1973 and I didn't notice that there is a difference. Are there any other differences between years for the relay boards?

* Why the difference in the slotted/Phillips screws on the corners of each relay? Are those screws are ready power sources in the engine bay? . No reason. one of the relays I got had different fasteners.

* Would you consider making a kit with just the base and parts list/instructions available?
Maybe in the future. Right now I am working on another project.

[JeffBowlsby]

Drooling over this, I have some observations and questions:

* This board would not work for 914s with a rear window defroster
* This board would not work for the 1972-only 914s that use pin 3 of the 12-pin connector for an oil temp sender circuit (to the dash gauge)
* Why the difference in the slotted/Phillips screws on the corners of each relay? Are those screws are ready power sources in the engine bay?
* Would you consider making a kit with just the base and parts list/instructions available?

Hi Jeff,
* This board would not work for 914s with a rear window defroster .Yep, there was only enough room for 3 solid state relays. I read somewhere that only about 5% of 914 have a rear window defroster. Is this true?

* This board would not work for the 1972-only 914s that use pin 3 of the 12-pin connector for an oil temp sender circuit (to the dash gauge)
Good point. My car is a 1973 and I didn't notice that there is a difference. Are there any other differenced between years for the relay boards?

* Why the difference in the slotted/Phillips screws on the corners of each relay? Are those screws are ready power sources in the engine bay? . No reason. one of the relays I got had different fasteners.

* Would you consider making a kit with just the base and parts list/instructions available?
Maybe in the future. Right now I am working on another project.

Your work is commendable Steve, I hope you can find a way to make these available to the masses. I understand that the 914 was one of the first if not the first vehicle to use a configured board like this and a modern replacement using current technology would be welcomed. If a kit was available, there are enough DIY types here that mounting the relays and wiring it up would be one way to minimize the investment. Maybe a group buy in quantity as well. Mark Whitesell may be interested in producing them with your assistance, especially if they can be molded or done in a production mode. "Mikey914"

The 914/4 boards were all the same, but the three harnesses that plug into them were different. The 1972-only ignition harness is the only one that uses pin 3 of the 12-pin, I don't recall if the chassis harnesses interface with the board differently, would need to research it. The /6 guys need their version just as much as the /4 guys do.

[Steve_R]

Drooling over this, I have some observations and questions:

* This board would not work for 914s with a rear window defroster
* This board would not work for the 1972-only 914s that use pin 3 of the 12-pin connector for an oil temp sender circuit (to the dash gauge)
* Why the difference in the slotted/Phillips screws on the corners of each relay? Are those screws are ready power sources in the engine bay?
* Would you consider making a kit with just the base and parts list/instructions available?

Hi Jeff,
* This board would not work for 914s with a rear window defroster .Yep, there was only enough room for 3 solid state relays. I read somewhere that only about 5% of 914 have a rear window defroster. Is this true?

* This board would not work for the 1972-only 914s that use pin 3 of the 12-pin connector for an oil temp sender circuit (to the dash gauge)
Good point. My car is a 1973 and I didn't notice that there is a difference. Are there any other differenced between years for the relay boards?

* Why the difference in the slotted/Phillips screws on the corners of each relay? Are those screws are ready power sources in the engine bay? . No reason. one of the relays I got had different fasteners.

* Would you consider making a kit with just the base and parts list/instructions available?
Maybe in the future. Right now I am working on another project.

Your work is commendable Steve, I hope you can find a way to make these available to the masses. I understand that the 914 was one of the first if not the first vehicle to use a configured board like this and a modern replacement using current technology would be welcomed. If a kit was available, there are enough DIY types here that mounting the relays and wiring it up would be one way to minimize the investment. Maybe a group buy in quantity as well. Mark Whitesell may be interested in producing them with your assistance, especially if they can be molded or done in a production mode. "Mikey914"

The 914/4 boards were all the same, but the three harnesses that plug into them were different. The 1972-only ignition harness is the only one that uses pin 3 of the 12-pin, I don't recall if the chassis harnesses interface with the board differently, would need to research it. The /6 guys need their version just as much as the /4 guys do.

Thanks Jeff.
I already spoke to mark about these. Unfortunately, when I designed this board I was not thinking about mass producing them. I have a good day job. I really just planned to make one and a couple extra to sell to help pay for some of the tools I needed. The board itself is machined from plastic using a CNC mill that uses 10 different tools (end mills and drills) and takes 3 hours to machine. My mill does not have an automatic tool changer so I need to be near the mill for the 3 hours. Also, the relays are industrial quality that are used in robots and medical equipment so they're not cheep.

However, I think it could be redesigned to be machined on a CNC router with one tool and use automotive solid state relays. Right now I just have too much on my plate.

[jd74914]

However, I think it could be redesigned to be machined on a CNC router with one tool and use automotive solid state relays. Right now I just have too much on my plate.

Small hijack (the relay board is AWESOME BTW)...do you know of a source for automotive SSRs? Hella and Delphi are supposed to make some but I've never actually been able to find any to purchase.

[Steve_R]

However, I think it could be redesigned to be machined on a CNC router with one tool and use automotive solid state relays. Right now I just have too much on my plate.

Small hijack (the relay board is AWESOME BTW)...do you know of a source for automotive SSRs? Hella and Delphi are supposed to make some but I've never actually been able to find any to purchase.

Rallylights sells one:

http://www.rallylights.com/hella-hl87251-m...ay-12v-20a.html

[Strudelwagon]

we use these at work...

[cegallegos99]

Any good relay boards for sale?

I am asking since driving around the neighborhood for 15 mins then smell old glue smoke. Not sure if the relay board as also, feel less power after the smell.

History behind it is a local Porsche mechanic re-started the engine by tinkering with the relay board and finally unplugging one of the relays (the bottom left hand).

Don't know much about the electronics but need some assistance if need a new relay board.

Any guidance?

[RoadGlue]

Any good relay boards for sale?

I am asking since driving around the neighborhood for 15 mins then smell old glue smoke. Not sure if the relay board as also, feel less power after the smell.

History behind it is a local Porsche mechanic re-started the engine by tinkering with the relay board and finally unplugging one of the relays (the bottom left hand).

Don't know much about the electronics but need some assistance if need a new relay board.

Any guidance?

(IMG:style_emoticons/default/bye1.gif)

Sorry to hear about the problems with your car.

I recommend starting a new post though in the garage. This thread is specifically regarding the relay boards that the original poster created.

Cheers,

[N_Jay]

Wasn't planning on it. I'm a bit of a nut about emulating originality, so I'm debating between original round relays and more modern Bosch square relays. But I still totally appreciate the upgrade to solid state. If I could find a solid state that looked exactly like an original round relay, I'll buy 100 right now. (IMG:style_emoticons/default/wink.gif)

Hella makes one as long as the original relay is triggered by a ground connection (The SS relay does not use the + side of the coil connection and needs a Gnd on the low side of the coil.

http://hellahd.com/index.php/default/elect...3001-931773987/

[Cairo94507]

Man, do I wish Steve would make these for a Six......

[N_Jay]

So close, but so far.

I certainly understand why it is a $500 part, but it is hard to justify at that price.

Maybe someone else here could pick up the project.

We are all (most all) tinkers, so all we probably need is a kit with the board cut/molded and the hard to source parts. (Probably just the pins, since automotive relays use regular 1/4 blade connectors.
As an EE I offer my (limited) skills, as this is mostly a machining/manufacturing project.

Anyone? Anyone? Beuller?

[Whitney Mic]

So close, but so far.

I certainly understand why it is a $500 part, but it is hard to justify at that price.

Maybe someone else here could pick up the project.

We are all (most all) tinkers, so all we probably need is a kit with the board cut/molded and the hard to source parts. (Probably just the pins, since automotive relays use regular 1/4 blade connectors.
As an EE I offer my (limited) skills, as this is mostly a machining/manufacturing project.

Anyone? Anyone? Beuller?

Well... It's not C-n-C exactly, but:

I have a 3-D printer, but from the pics of the block the design is far too complex for *my* skills. If the C-n-C uses a file I could export, convert and run on my printer, I can try to build the base plate.

If that doesn't work out and someone has the chops to CAD both sides of the relay board and send me an .STL file (or similar), I can convert that and put it on the printer and see what comes out. I've seen some very nice technical drawing since finding my way into the World, there must be someone around with the design skills I lack.

The 3-D printer I own can build to a volume of 6" X 9" X 8". I don't knowhow much time it would take to build this piece. So far I have printed some good, strong parts using ABS and PETG plastic; the PETG prints, but my machine doesn't really get hot enough for the stuff (if I could get it a few degrees hotter, PETG can print pretty much clear pieces).

Here's a piece I'm working on for the center console gauges so they point at me instead of at the interior light:


(sorry, it's a yuge pic) The piece is just a prototype, I will print them in black, sand, finish, and paint the ones I use in my cabin (I might even see about building them 10% larger and having a set cast in aluminum and anodized).

I can print in other plastic types as well, but will have to order material, set up the machine and see how it goes.

I am trying to learn how to design this stuff a bit late in life and the learning curve seems sharper for some reason. I might be able to build something close-ish, but doubt I could do the job right with my current skills.

I'm willing to donate the materials and time on the machine for prototyping a board if someone wants to give it a go. Once I have an idea of cost of material and time, I could figure a fair price for this part of the puzzle...No way I could handle a huge demand though. I'm still trying to figure how to get the printer to pay for itself and justify the price.

Putting it out there, just in case.

-- Whit

[N_Jay]

If I can get the pins for the body and engine connectors, I might try just building one by hand out of plexiglass sheet.

[NS914]

Hi Steve,

Your relay board is truly a work of art...I am constantly amazed at the skills of many of you here in the world. Do you still have any boards left....it has been quite some time since you posted but I thought I would give you a yell.

I am in the final throws of putting my electrical back together and I know this board would likely eliminate as yet unknown issues that will surely arise...LOL!

Grant

[cegallegos99]

Hi

I am looking at yours as a new production

Do you have one more?

[Mueller]

Steve,

If you decide to out source the machining of these let me know, new CNC mill at home with a 10 tool ATC (IMG:style_emoticons/default/smile.gif)

[Mikey914]

We've been spending some time putting together a redesigned board with solid state relays. I have to finish the 19mm master cylinders before I jump full bore into this, but these would look OEM until you pop the cover.