02GF74
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| posted on 8/1/16 at 12:25 PM |
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quote:
Originally posted by obfripper
The diodes and capacitors are to protect the circuit against voltage spikes and smooth any jitter in the voltages.
They aren't absolutely necessary, but will make the circuit more durable.
The 7805 will produce some (~3w) heat with no load due to the way it works, a buck converter would be more efficient but would require a
more complicated circuit.
Dave
Agree with all the above except the part in green. The power dissipated will be more or less voltage drop (7V in this case) multiplied by current
through the device. I do not believe the no load current is 0.43 A. 
The sensor would draw in the region of milliamps - 7805 without heatsink will be fine.
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omega 24 v6
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| posted on 17/1/16 at 07:31 PM |
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OK so a little update as promised. The emerald ecu output for the tachometer does indeed power the acewell BUT its reading about three times more than
the actual revs. Fitting the resistor in line ( in series) kills the signal altogether and no rpm on acewell showing. Anyone got any advice on
this??
The gearbox is now all wired and I will report back on that when the car is actually on the road and running.
Thanks for now.
If it looks wrong it probably is wrong.
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russbost
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| posted on 17/1/16 at 08:12 PM |
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The. rpm should just be a matter of changing the no. in the setup, you have 0.5, 1, 2 & 3 which refers to the no. of pulses the Acewell is
expecting to see per engine revolution. Most 4 cyl. engines require 0.5, if wasted spark then 1.
I no longer run Furore Products or Furore Cars Ltd, but would still highly recommend them for Acewell dashes, projector headlights, dominator
headlights, indicators, mirrors etc, best prices in the UK! Take a look at http://www.furoreproducts.co.uk/ or find more parts on Ebay, user names
furoreltd & furoreproducts, discounts available for LCB users.
Don't forget Stainless Steel Braided brake hoses, made to your exact requirements in any of around 16 colours.
http://shop.ebay.co.uk/furoreproducts/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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omega 24 v6
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| posted on 17/1/16 at 08:15 PM |
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C.O.P so will have a play and get it right I'm sure. Couldn't acess the settings screen since its been so long ago since I looked at the
instructions LOL.
If it looks wrong it probably is wrong.
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