Hey guys,

I need someone to help me build an electronic circuit. I have a diagram, but I don't know enough about electronics to do it myself.

It's basically a 10-15 dollar adjustable RPM switch that I need to trigger a LED shift light that I have placed in my dash in place of the needle stop pin.

If you can read electronic diagrams and have the ability to make this little project, let me know and we will work a deal.

Thanks a ton,

 

You can email/pm me the diagram and I can see what I can do.

 

X2 Pm/email me the diagram.

 

Here, let me post you all the link.

http://www.eagle-research.com/fuelsa.../83honda2.html

It looks to be pretty simple, but I just don't have the technical knowhow or tools to do this :-)

It seems like a cool little project

I would like this to have an output capable of 12V @.03 amps

Thanks,

 

Looks a little bit more complicated than what I'd want to mess. I haven't done anything like that before. It does look pretty cool. Maybe I'll give it a shot here in a couple weeks when I have some free time.

 

Wow...they made that way more complicated than it has to be. Wait for it to stabilize thermally? Don't build stuff for the automotive environment much do they.

I think I still have the schematic for a universal shift light I had built for my M3 many, many moons ago. I will see if I have it.

"Wait a minute for the circuit to stabilize thermally..." Ah ha ha ha ha ha, that kills me.

Edit 6-30-08: I looked through my piles of old information from old mailing lists, defunct forums, etc. and can not for the life of me find the schematic I was looking for. If I ever run across it, I will scan it and post it up in here.

 

I don't care how complicated or simple the circuit is... all I need it to do is trigger a dash LED with an adjustable RPM

 

in all honesty just get a shift light. I do car electrical and yes im sure I can do it but thats alot of crap to just read tach and trigger a light. this would probably cost you more money then just a shift light to be honest.

 

Well, I priced out shift lights, and the cheapest that includes an adjustable tach trigger is over $100. I priced out the parts for this project, and it's under $10.

Not really alot of crap, just don't have the time or the tools here to do it myself.

 

OK, figured I would just price this out real quick... these are all internet searches, but I am sure I can pick this all up at my local frys electronics or other component store for nearly the same price...

R1 $.25 (for 4) so $.07
R2 $.99 (for 10) so $.10
R3 $.99 (for 10) so $.10
R4 $.99 (for 5) so $.20
R5 $.99 (for 5) so $.20
R6 $.23
R7 $.25 (for 5) so $.05
R8 $.23

C1 $.25
C2 $.29
C3 $.25
C4 $.92
C5 $.50
S1 Not needed
LED $.25
555 timer $1.69
dual op amp $.25
V regulator $.55
rectifier $.40

OK, so just for the components, the cost is $6.53 add in a case, and potting material and a project board, and you are looking at under $15 to create an RPM switch. Find me any shift light for cheaper than that.

 

what about the bread board to test it?

the additional components to proof it on the bread board?

the massive amount of time to proof it?

cripes. while its a rather simple circuit to build the design is what is time consuming. the components they list do not have definite values. the list one as 20 microfarads as low as 10 microfarads. so i gotta test all the combos in between? also what other components are going to be affected by that change in size? will i have to adjust their values too if i cange that one? (hypothetical type question as i have not studied the circuit indepth.) you see where this is going? i would venture to guess 6-10 hours of build time and as for quality soldering that's up in the air depending on who you get to do this.

i taught an electronics repair and troubleshooting school for 5 years when i was in the navy. this isnt that simple if you want decent quality and with out definite component specs provided by the diagram that much more difficult. its not just throwing components together.

do yourself a favor and get a shift light.

before any "electronics experts" want to flame me about what i've written, this is based on providing high quality work and solely off the information provided on the link. if you are indeed better than me and so forth...fine, i just writing based on my experience in the lab and in real life doing troubleshooting, soldering and limited circuit design.

 

when/where did you teach in the navy? I'm an electrician (nuke) in the navy now.

 

i was an etms instructor at nastypac. nuke et