Computer Science Canada Tachometer help needed. [looking for car geeks and circuit geeks] |
| Author: | ecookman [ Mon Dec 05, 2011 10:55 pm ] |
| Post subject: | Tachometer help needed. [looking for car geeks and circuit geeks] |
My friend and I are restoring a 1996 Chevy S-10, body work, rebuild engine, clean up the interior the works basically. One thing that we'd both like to see go into the truck is a Tachometer as the dime doesn't have one [manual tranny]. I thought up a cool idea of making a custom one up on the dash made up of LED's. [Higher the RPM's the more LED's go on like a Tach you'd find in a racing car]. I honestly have 0 clue on how I would begin to interface the circuit or what I would need to start building the circuit. Any ideas? |
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| Author: | Tony [ Mon Dec 05, 2011 11:03 pm ] |
| Post subject: | RE:Tachometer help needed. [looking for car geeks and circuit geeks] |
http://en.wikipedia.org/wiki/Rotary_encoder |
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| Author: | chrisbrown [ Tue Dec 06, 2011 6:52 pm ] |
| Post subject: | Re: Tachometer help needed. [looking for car geeks and circuit geeks] |
If you want a 16-LED display (say 9 green, 4 yellow, 3 red), you could use two <a href="http://www.datasheetcatalog.org/datasheets/90/232315_DS.pdf">8-line demultiplexers</a> in parallel. For your controller you could use <a href="http://arduino.cc/en/Main/ArduinoBoardUno">an arduino</a> with <a href="http://arduino.cc/en/Main/ArduinoProtoShield">a proto shield</a> on top. It just needs a 5-12v DC supply. Tony, I think a <a href="http://en.wikipedia.org/wiki/Hall_effect_sensor">magnetic sensor</a> might be less trouble than would be mounting an encoder securely and precisely, especially since angular position isn't important (unless the guy is a REAL car nut). |
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| Author: | ecookman [ Tue Dec 06, 2011 10:08 pm ] |
| Post subject: | RE:Tachometer help needed. [looking for car geeks and circuit geeks] |
Yeah I think I'm going to do a 16 Led display as cb said, and I think I'm going to use a magnet sensor off one of the spark plugs. I'm going to look into the Ic's and start to do up a drawing lol. thanks for the start. -------------edit------------ Yea, this project is way over my budget. Thanks for the help anyway was fun to learn about this stuff :p |
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