FridgeFreezer Posted April 9, 2008 Share Posted April 9, 2008 It started as an experiment with the LM3914 and ended up as a functioning, if rather makeshift, AFR meter: Made on breadboard - check Badly soldered - check Using mostly recycled components picked up off the floor - check Works perfectly - check Likely to earn me a disapproving chuckle from TSD - check With a little more finesse it might look OK stuffed into the gauge cluster, I'm tempted to do another two for temperature and voltage, just need to work out how to work with the non-linear temperature sender (my electronics design is way too rusty for a simple thing like that). For those who are interested, it gives a dot readout from 0-1v, as you can see there's very few components to it, the circuit is basically straight off the LM3914 datasheet with a tweaked reference resistor pair. Quote Link to comment Share on other sites More sharing options...
integerspin Posted April 9, 2008 Share Posted April 9, 2008 That looks pretty good, I scrounged a lamda sensor some years ago to make one but never got round to it.. Quote Link to comment Share on other sites More sharing options...
LandyManLuke Posted April 9, 2008 Share Posted April 9, 2008 Groovy. Nothing wrong with veroboard, well it's a step up from poking components through cardboard and soldering wires on the back I bet that last LED feels left out without it's own track Quote Link to comment Share on other sites More sharing options...
MECCANO Posted April 9, 2008 Share Posted April 9, 2008 Now theres an idea. Didn't decide to go for the solid bar flash lighty when maxed out version thats on the data sheet then. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted April 9, 2008 Author Share Posted April 9, 2008 Now theres an idea. Didn't decide to go for the solid bar flash lighty when maxed out version thats on the data sheet then. Didn't think it was really relevant to the AFR as it's very hard to be dangerously rich. It could perhaps be made to flash when really lean but TBH it was midnight and I couldn't be arsed Quote Link to comment Share on other sites More sharing options...
integerspin Posted April 9, 2008 Share Posted April 9, 2008 PCBs are not very hard to make, I made one;-) I alterered a rev counter, the circuit board was pretty easy to make and suprisingly the rev counter worked... Quote Link to comment Share on other sites More sharing options...
MECCANO Posted April 9, 2008 Share Posted April 9, 2008 Didn't think it was really relevant to the AFR as it's very hard to be dangerously rich. It could perhaps be made to flash when really lean but TBH it was midnight and I couldn't be arsed Soooo..... it looks cool Quote Link to comment Share on other sites More sharing options...
david1701 Posted April 9, 2008 Share Posted April 9, 2008 electronics? IN A LAND ROVER!!!! lol its gonna be my specialty - oh dear Quote Link to comment Share on other sites More sharing options...
muddy Posted April 11, 2008 Share Posted April 11, 2008 Do you do a TDi version? Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted April 11, 2008 Author Share Posted April 11, 2008 Do you do a TDi version? It's entirely possible, yes. Quote Link to comment Share on other sites More sharing options...
Astro_Al Posted April 11, 2008 Share Posted April 11, 2008 Fridge - can you put the leds on an arc to match the circumferential curve at their radius? (In other words so they look like they fit! - God what a stupid way of writing it!). Would look uber cool. B) Al. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted April 11, 2008 Author Share Posted April 11, 2008 Al - I could, yes. I could also buy more chips and cascade them to give higher resolution using smaller LED's. Who knows what will happen depending how much time I have between now & Russia. Quote Link to comment Share on other sites More sharing options...
paintman Posted April 11, 2008 Share Posted April 11, 2008 Oh dear. Land Rovers. Electronics. Still, you can't do any worse than the factory efforts! Quote Link to comment Share on other sites More sharing options...
Astro_Al Posted April 12, 2008 Share Posted April 12, 2008 Cool - I still have that indicator stalk jobber for you, if its for Eddy. Al. Quote Link to comment Share on other sites More sharing options...
101nut Posted April 12, 2008 Share Posted April 12, 2008 What about going the other way and using a mod on the fuel gauge to read the sensor? Would fit, look right and not be quite so bling for us oldies AndyG Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted April 13, 2008 Author Share Posted April 13, 2008 Could do, but my new speedo has a fuel gauge on it: Quote Link to comment Share on other sites More sharing options...
TomG Posted April 13, 2008 Share Posted April 13, 2008 B) very nice! How does the speedo pickup work? Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted April 13, 2008 Author Share Posted April 13, 2008 B) very nice!How does the speedo pickup work? It's got a cable adapter, you can use a magnet and reed switch or a VR or hall pickup, or a speed transducer from an LT230, or... Quote Link to comment Share on other sites More sharing options...
Daan Posted April 13, 2008 Share Posted April 13, 2008 It's got a cable adapter, you can use a magnet and reed switch or a VR or hall pickup, or a speed transducer from an LT230, or... Use the GPS signal, which then also controlls traction control? Quote Link to comment Share on other sites More sharing options...
david1701 Posted April 13, 2008 Share Posted April 13, 2008 i thought traction control was the throttle Quote Link to comment Share on other sites More sharing options...
integerspin Posted April 13, 2008 Share Posted April 13, 2008 For my rev counter I used an old abs sensor[99p on ebay] they are pretty easy to mount and fairly robust. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted April 13, 2008 Author Share Posted April 13, 2008 GPS wouldn't be fast enough for traction control - not a problem though as MS already has anti-rev traction control, I've just not worked out if it'd ever be useful. The LR ETC system is actually very effective but it would need extra hardware, and having lockers I can't see a need to fiddle. Quote Link to comment Share on other sites More sharing options...
TSD Posted April 18, 2008 Share Posted April 18, 2008 Likely to earn me a disapproving chuckle from TSD - check Who, me? Nah, I dont get to dissaprove of that... I put one in a standard 52mm (?) guage housing about 6 years ago, before I'd even installed my first megasquirt. I'm not bling enough to use vero though, real engineers cut the tracks directly into plain board with a scalpel It might still be around here someplace... will have a look. Quote Link to comment Share on other sites More sharing options...
Daan Posted April 18, 2008 Share Posted April 18, 2008 GPS wouldn't be fast enough for traction control - not a problem though as MS already has anti-rev traction control, I've just not worked out if it'd ever be useful. The LR ETC system is actually very effective but it would need extra hardware, and having lockers I can't see a need to fiddle. It can be made to work if your GPS signal is good enough. Retard the ignition very quick to reduce power and thats how that works. Quote Link to comment Share on other sites More sharing options...
dollythelw Posted April 18, 2008 Share Posted April 18, 2008 how does that work Daan? Quote Link to comment Share on other sites More sharing options...
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