Forum: OpenGauge / MPGuino FE computer
07-04-2011, 06:33 PM
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Replies: 43
Views: 12,598
Glug, you might just need a simple "amplifier"...
Glug, you might just need a simple "amplifier" upstream of the guino, i.e.
http://ecomodder.com/forum/attachment.php?attachmentid=8908&stc=1&d=1309818762
It would be good to know what your car...
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Forum: OpenGauge / MPGuino FE computer
06-18-2011, 03:20 PM
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Replies: 43
Views: 12,598
Are you still using the circuit that produces a...
Are you still using the circuit that produces a short pulse at each zero crossing or did you change to the circuit that toggles the output for each zero crossing? I suspect you are bumping up against...
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Forum: OpenGauge / MPGuino FE computer
06-14-2011, 12:06 AM
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Replies: 43
Views: 12,598
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Forum: OpenGauge / MPGuino FE computer
04-22-2011, 11:59 PM
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Replies: 43
Views: 12,598
The LM2907 is a low cost frequency to voltage...
The LM2907 is a low cost frequency to voltage converter that works also works great for interfacing to a variable reluctance transducer. It comes in a couple variations. The 8 pin part has all the...
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Forum: OpenGauge / MPGuino FE computer
04-12-2011, 12:24 PM
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Replies: 43
Views: 12,598
339, or 393? Though it's a pretty basic...
339, or 393? Though it's a pretty basic comparator circuit that should work with many op-amps, your diagram says 393.
10uF might be overkill for the decoupling cap on your input. Also, electrolytic...
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Forum: OpenGauge / MPGuino FE computer
03-28-2011, 07:38 PM
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Replies: 43
Views: 12,598
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