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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Tachometer pulse sensor problems
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<blockquote data-quote="BigEd" data-source="post: 172319" data-attributes="member: 161"><p>You should try putting a diode between the moto-gadget sensor and your tachometer. The output from the sensor will be minimal so a small one is OK. ( If you don't have much electronics knowledge a diode is basically a one-way valve.) A 1N4001 diode costs literally pence. Do a search on the internet. If it doesn't work try connecting the diode the other way around as it may be blocking in the wrong direction. There were tachometers that looked like the Smiths ones available a few years ago but the one-man band stopped making them. These worked once a diode was fitted in the feed to the tacho.</p></blockquote><p></p>
[QUOTE="BigEd, post: 172319, member: 161"] You should try putting a diode between the moto-gadget sensor and your tachometer. The output from the sensor will be minimal so a small one is OK. ( If you don't have much electronics knowledge a diode is basically a one-way valve.) A 1N4001 diode costs literally pence. Do a search on the internet. If it doesn't work try connecting the diode the other way around as it may be blocking in the wrong direction. There were tachometers that looked like the Smiths ones available a few years ago but the one-man band stopped making them. These worked once a diode was fitted in the feed to the tacho. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Tachometer pulse sensor problems
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