Bar graph LED rev counter

Fungus Part of things Posts: 960	Bar graph LED rev counter Fungus @hondaman
	Sept 20, 2011 20:30:39 GMT Select Post Deselect Post Link to Post Back to Top
	Anyone made one of these before? I've been looking around online but there isnt much useful info (to someone who isnt in to electronics). I want to make one for a single cylinder engine, but surely the principle is the same for more cylinders? I'm sure i've seen a few on here, and it would be great if someone could offer some advice Cheers


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ben711200 Posted a lot Posts: 3,412	Bar graph LED rev counter ben711200 @ben711200
	Sept 20, 2011 20:54:32 GMT Select Post Deselect Post Link to Post Back to Top
	I know zero about electronics Have you looked for shift light circuits? Surely you need a series of 'shift lights' at however many hundred rpm intervals.
	Oct 12, 2012 9:40:03 GMT Robinxr4i said: ...proper medallion man chest wig motoring.

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MiataMark Club Retro Rides Member Posts: 2,963 Club RR Member Number: 29	Bar graph LED rev counter MiataMark @garra Club Retro Rides Member 29
	Sept 20, 2011 21:14:08 GMT Select Post Deselect Post Link to Post Back to Top
	I built one about 30 years ago, you need a frequency to voltage converter and then a bargraph driver. After a quick google try this site, foz11.tripod.com/DIY_MOD_s/Digital_Speedo/digital_speedo.html For more LEDs you can cascade the 3914 chips. look here, www.quasarelectronics.com/velleman/k2625-digital-tachometer-kit.htm Mark
	Last Edit: Sept 20, 2011 21:23:05 GMT by MiataMark 1990 Mazda MX-5 2012 BMW 118i (170bhp) - white appliance 2011 Land Rover Freelander 2 TD4 ~~2003 Land Rover Discovery II TD5~~ ~~2007 Alfa Romeo 159 Sportwagon JTDm~~

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Soopahfly Posted a lot Posts: 2,352	Bar graph LED rev counter Soopahfly @soopahfly
	Sept 21, 2011 10:53:55 GMT Select Post Deselect Post Link to Post Back to Top
	Something like this? www.edutek.ltd.uk/Circuit_Pages/Rev_Counter.html


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