Quote Originally Posted by RamblinDMC View Post
I'm planning on making a replica digital speedometer sometime soon. I can't seem to find any dimensions/drawings of it online anywhere. Does anyone know a source for this? I really just need the dimensions of the box and the size of the 7 segment LED displays.

Thanks!

The digital speedo box is made from Hammond enclosure PN 1591CGY.

http://www.mouser.com/ProductDetail/...ygdYdvPg%3D%3D

The original was actually blue so production painted it white. The gray enclosure is close in color that you wouldn't need to paint it or you can still paint it satin white. The connector on the back is a D-sub type connector like you'd find on an old printer cable. There are various types you can buy on Newark.com, mouser.com, etc that are close, I don't have a source for any that are identical to the screen used connector.

The digital displays were originally made by Stanley Readout and are basically extinct at this point since they're ancient technology. Most people use 7 segment LED displays that look pretty accurate if you put a sheet of acetate film over the displays to act as a diffuser. I made a speedo a long time ago and used 1/16" styrene sheet to build the little black frame around each digit. The black border is part of the Stanley Readout on the real car, but you can make a close approximation of the real thing with polystyrene around an LED display and paint it black.

Here's a CAD model of how the original was constructed showing the Stanley Readout housings. If you're going for super accuracy people have made plastic castings of the stanley bodies and then made matching circuit boards with grain of wheat size incadecent bulbs or warm LED's. It also requires manufacturing a clear lens and as well.




Here's a stanley readout housing minus the clear lens, diffuser, or circuit board.


The speedo was originally 3 digits and would read XX.X Apparently the third 1/10 MPH digit made reading the display confusing so production put a piece of black gaffer's tape over the 3rd digit so you only see XX.

The images above are all I have available at the moment, but I can post some better reference if you need it.