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1990 Brg - Miglia Mini Style Track Project


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#16 GraemeC

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Posted 12 January 2017 - 12:54 PM

Run it through a changeover relay and it should be good



#17 minifreek1

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Posted 12 January 2017 - 02:02 PM

A simple 1-2 amp diode, wired in series, should stop it from interfering with the brake lights... in theory anyway...

 

A diode only lets current flow 1 way.... thats what Id try first....



#18 Steve8274

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Posted 12 January 2017 - 03:36 PM

Awesome work gone into this. Looking forward to updates

#19 sixtyeight

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Posted 14 January 2017 - 05:56 AM

RE your brake/fog light - you really shouldn't dim LEDs with resistors. best way to dim leds is with a PWM LED driver. this pulses the LED at a high enough frequency that isn't detectable to the human eye, but allows them to dim. I just made one up out of a 555 timer, a transistor and some resistors and a potentiometer for some RPM leds I've made to go around the tacho, Potentiometer allows you to adjust brightness. you could even wire some resistors to dip switches to set brightness so it doesn't move from vibration. will be doing the same for my LED brake light I've made as it is way too bright. like blinding bright! 

 

This is the only pic I have of the cct, but its very small. thats an 80mm smiths tacho

 

GmpLji3.jpg

 

LED shift lights

 

pKNjOn8.jpg

 



#20 patto

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Posted 19 January 2017 - 06:38 PM

Thanks for the info I used the resistors for simplicity really and they were supplied with the light. Is there much downside to using resistors as opposed to the pulsing circuit? The voltage rating for the light is 9v with a maximum of 12v so I’m only trying to drop a few volts from what’s supplied from the alternator.

 

As you can probably tell automotive electrics isn't really my strong point, I haven’t done much in the way of circuit design since uni so if anyone has suggestions for switching it between brake and fog light that would be great. I again was just going to keep it simple and use a illuminated SPDT switch on the dash but is there a better way?

 

fog%20light_zps7ym4zrwn.jpg



#21 morley

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Posted 19 January 2017 - 09:06 PM

Nice work, I wish i had access to all that machinery, i'd be forever making stuff! Whats next? 



#22 paulrockliffe

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Posted 19 January 2017 - 09:30 PM

RE your brake/fog light - you really shouldn't dim LEDs with resistors. best way to dim leds is with a PWM LED driver. this pulses the LED at a high enough frequency that isn't detectable to the human eye, but allows them to dim. I just made one up out of a 555 timer, a transistor and some resistors and a potentiometer for some RPM leds I've made to go around the tacho, Potentiometer allows you to adjust brightness. you could even wire some resistors to dip switches to set brightness so it doesn't move from vibration. will be doing the same for my LED brake light I've made as it is way too bright. like blinding bright! 

 

This is the only pic I have of the cct, but its very small. thats an 80mm smiths tacho

 

GmpLji3.jpg

 

LED shift lights

 

pKNjOn8.jpg

 

 

Any chance of a bit of a guide for how you did that, particularly getting the revs to match up to the LEDs?  I'd love to copy it to my new dashboard!

 

It would also be quite cool if you could get all the LEDs to flash at you if you get to your rev limit too, any ideas how you could do that?



#23 patto

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Posted 12 February 2017 - 02:35 PM

So I’ve been busy with my next little project.

 

I spent quite a while deliberating where I was going to put all my switches and bits. I plan on having the seating position quite far back so I can drop the steering column down and also fit in a proper peddle box, because of this once I’m harnessed into a bucket seat there’s no way I’ll be able to reach the dashboard.

 

So my first plan was a panel next to the seat on top of the exhaust tunnel but then I realised there would be no room with the gear linkage, the mechanical handbrake plus a hydraulic handbrake and the seats being so close. So I had a think and the only other practical place I could think of was the roof.

 

So I played with a few different designs on the computer and worked out what I was going to put on it and then started cutting some alloy out. Just regarding what tools I’m using pretty much everything is done with ordinary hand tools and power tools like grinders and drills. The only really specialised machine I use this the lathe which is a 1951 myford ml7 (66 years old  O_O ) oh and the mig and stick welders.

 

I first cut out the front panel and drilled pilot holes for everything to get it all laid out.

 

IMG_20170204_165908_zpsfeekrtmf.jpg

 

I wanted those little “D” shaped guards to go between the toggle switches and struggled to find any online, the only ones I could fine were £7.99 each! So I decided to make some luckily I found some 6mm OD stainless pipe in the garage I could bend and tap out to M5, so I knocked up 10 of them.

 

IMG_20170204_165854_zpsv9t9os80.jpg

 

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Next I cut out the bits for the sides, back and bottom and attached them with gaffa tape to make sure it all fits, I was just debating whether or not to make life easier for myself and leave it with the tape but I thought I’d best to weld it up. Unfortunately my mig welder was not playing ball and was struggling to feed the cheap and nasty Clark alloy wire but I struggled on.

 

IMG_20170204_193326_zps22y0uwzx.jpg

 

IMG_20170204_193326_zps22y0uwzx.jpg

 

IMG_20170205_190945_zpsxhp7i6cz.jpg

 

IMG_20170205_190853_zpsalisrzju.jpg

 

When it was all welded up and flattened off I refinished it with various grades of sand paper

 

IMG_20170207_181903_zpsg5ckqupo.jpg

 

I started doing the wiring at this point but I was still waiting on some lights and the bayonet plugs and sockets for the back but I managed to get all the switches wired in.

 

IMG_20170208_201954_zpsjno8beot.jpg

 

Then a few days later the sockets turned up so I got them fitted.

 

IMG_20170209_200126_zpsyqvnm4pd.jpg

 

Then the lights turned up so I could finish off all the wiring.

 

IMG_20170211_150452_zpsx9jx7xyk.jpg

 

My mam has this nifty little computer controlled cutter she uses for making birthday cards and stuff like that but it can also cut vinyl which is quite handy so I cut out some labels for it and that’s it all about done.

 

IMG_20170211_180517_zpsueu7fojb.jpg

 

IMG_20170211_180535_zpsxifydbpm.jpg

 

Once I get the car sorted and the cage in I can make up some brackets but until then that’s about as far as I can go. I’ve got 2 lengths of 12 core cable that will run down to the fuse/relay box and I’m in the process of redesigning the whole wiring loom so everything will be fused, and anything that runs at decent amps will go through relays.

 

 

 



#24 patto

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Posted 19 March 2017 - 09:39 PM

Hi guys, not a particularly exciting update but thought I’d stick some pictures up.

 

I decided to make a new sump plug because I’ll have to drill and tap it to fit an oil temperature sensor. So I thought I might as well make one from scratch from titanium, not particularly for lightness or anything just mainly because I’ve got loads of the stuff. I haven’t bothered drilling it out yet until I decide on what gauge/sensor I’ll be using.

 

IMG_20170319_151351_zpsal5rzcuf.jpg

IMG_20170319_151311_zpspxopnxzg.jpg

 

Other than that I’ve decided to take on the daunting task of redesigning the whole wiring loom, its already harder than I expected. I think I’ve almost got the circuit diagram sorted there’s just a couple of little bits I’ll change. I’m just at the stage now of calculating all the cable and fuse sizes. I’ve still got all the instrumentation to add, and because of the toggle switched I’ve used I’ve had to use a couple more relays than I’d like because the switches are only rated to 5amp.

 

Mini-full-loom%20rev%201_zpskzzk7w3m.jpg

 

And the best news of all is I’ve finally had an offer accepted on a house which is all going through at the moment, but unfortunately the mini will have to stay in storage for a tad longer while I build a garage to put it in. the single garage at the moment just isn’t adequate so I get to build one from scratch just the way I want it.

 

 






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