Tachometer Kit Tach
Creating a tach out of these parts?
hello,
i have a rotating shaft that i need to hook up a tachometer to. it generally rotates about 30-50 times per minute. using this sensor ( http://www.dartcontrols.com/manuals/OPUHU.pdf ) and this frequency counter kit ( http://www.sparkfun.com/commerce/product_info.php?products_id=9003 ) would i be able to display RPMs? also, how would I hook these up together?
thanks
outputting the frequency using multiple markers would work. all i need is some sort of numerical output relating to RPM.
how would you hook up this sensor and the frequency counter to a power supply (suggestions on which to use) and the sensor readout to the counter in order for this to work?
Thanks!
The counter has a lower limit if 1 Hz, and you are supplying it with 0.5 to 0.8 Hz (30 to 50 RPM), so I'd have to say no, although I'd need to study the firmware to be sure, and that would take a lot of time. But it should be able to do lower frequencies, it's just a matter of how the software is setup.
The sensor needs a pullup resistor between it's output and +5, 1k would do.
One possibility is to put 10 markers on your wheel instead of 1, that would cause the sensor to output 10 pulses per revolution, and bring the frequency up to 5 to 8 Hz.
Note that counter outputs frequency in Hz, ie, revolutions per second, not per minute. Possibly the firmware could be changed, but how or by who?
.
Tachometer Kit Tach
US $233.75
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92x25mm Ball Bearing Quiet Computer Case Fan W/Tx3 Connector Dual Ball Bearing Tachometer Wire $20.59 This quiet, dual ball-bearing (9.25cm) Case Fan offers a cost-effective solution for replacing a non-functional or noisy fan in your PC. Powered through a simple TX3 connection to the host computer power supply, the 8cm case fan helps keep your computer r... |
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Digital Photo Laser Tachometer Non Contact Tach $22.95 Measures the rotational speed with a visible red light beam from a powerful LED. It is a great tool to measure the RPM of motors and machine parts. In wood and metal working it can be used to accurately measure the speed of a lathe or milling machine. Can be used for HVAC applications in measuring fan speed. Detection distance up to 6 feet. Highly accurate, digital laser photo tachometer. To take ... |
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