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Rpm Tachometer

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30 Threads found on edaboard.com: Rpm Tachometer
In my case I would need a 100 ua meter to read 5000 rpm since my plug fires twice as much as most engines. The schematic shows a potentiometer in series with the meter. By running the engine at some known rate, and then adjusting meter travel to match, that ought to be sufficient to calibrate your tachometer.
I am using a pic16f877a, an EM-506 GPS module, and a 16x2 LCD to display the Speed Over Ground and using Timer 0 as the timer and Timer 1 as a counter to display rpm's. I can get the rpm's and speed to display individually but not at the same time. For the tachometer, I set the pre-scalar to 0x07 to create the longest delay possible prior (...)
Can somebody test this MAX7219 tachometer in hardware ? It uses PIC16F887 and 20 MHz crystal oscillator. MAX7219 is used for driving 8 digit 7 Segment display. I tested it in hardware using EasyPIC v7 and seeedstudio's DSO Quad (5 KHz square wave, 50% duty) but value varies a lot and vale is never stable. The device reads pulses on INT0 pi
i'am doing tachometer using microcontroller AT89s52 in this i'am using sensor to detect the pulses of motor and i want display the speed in lcd that is for below 100 rpm i want to display two decimal point and below 1000 rpm i have to display one decimal point and above 1000 rpm their won't be any decimal point please some (...)
Constant display of 3000 rpm seems to indicate 50 Hz hum but no tachometer signal at the counter input. Looks like a hardware problem.
Good, the electronics part seems to work. I think the software needs looking at though. You may have to live with the fact that multiplexing the display and measuring rpm are mutually exclusive. You may only be able to do one or the other, especially when you have delay routines to slow the display multiplexing, at best you will get some flicker
Hello.... I want to make project on tachometer using IR leds with AT89S51. I want to know how to program time/counter to take measurement in rpm and how do I display on 16x2 LCD and how to convert pulses in rpm...what is the formula for it??? I m programming microcontroller in Assembly 99 000 R
So I constructed this tachometer project (it can measure rpm using 3 methods but I just chose one of them which is by IR LED and Photodiode) and I'm really sure that I did it right according to the circuits schematic I got from an electronics magazine, but when I connect the power supply its just dead and nothing works at all, please look at both c
What is hidden inside that rar, and what is relation of that rar with your question ? See this projects:
500 rpm == 120 ms per cycle 2500rpm== 24 ms per cycle i think it's just enough one magnet but you must check the reed switch specifications about this times, it should be at least then times faster (response time of 1 or 2 ms) (i would go to the optic way to get rid of this issue ) the almost exact way is to setup a
You should search like "tachometer" or "rpm", but you must pay attention on accurency, because this is not car tacho with x1000, you have only two digits. Car tacho have about 60rpm accurency. I will see what can be found.
Have you considered utilizing a rpm/tachometer sensing the revolutions of a rear wheel or a part of the drive train, e.g., drive shaft. The resulting rpm can then be used to calculate the velocity of the vehicle if traveling in a relatively linear fashion. Another option, although more costly, is using a GPS module, which can provide (...)
I haven't got the same compiler so I can't simulate but the basic method I use is like this: Start with Oldrpm = 0 and accept it may not show the very first reading correctly, store the measured rpm in Newrpm. 1. show the first rpm reading, 2. calculate abs(Oldrpm - Newrpm) 3. if the (...)
Couple small dc-motor or spepper motor to measured motor axle (now you have tachometer) and measure generated voltage . It is function of rpm. Fix screw in radial direction to axle, measure with proximity sensor or with small , coil magnet inside , how many pulses it generate in 1 min. = rpm. Clue small white or reflective piece (...)
Hi, Recently I visited the page Frequency Counter by PIC16F628 Now I'm very much interested to build the circuit with modification to use it as a tachometer(or rpm meter).The hex file is working correctly for frequency meter. B
More data please What kind of tachometer? What kind of servo? position or speed? I used a washing machine motor with AC tacho for speed servo ; controling high speed in 5000 -13000 rpm range with uc3843 ,no micro.
Hali, Check pls the "Similar topics"... I think, her is a better description: K.
HI IM DOING A PROJECT WITH PIC 16F84, IM TRYING TO MAKE A DIGITAL tachometer WITH A 2X16 LCD AND THAT CAN GIVE ME rpm AND RPS BY ACTIVATING IT WITH A DIPSWITCH AND USING AN OPTO BUT I HAVE NO IDEA HOW TO DO IT. COULD ANYONE HELP ME PLEASE
I have to monitor current, voltage and rpm readings from a control panel using their analog panel meters present on the site. The panel meters has 0-200 VDC, 0-250 VAC, 0-60A and a tachometer. Any idea on how to interface it onto a processor to display those reading for monitoring? External Circuit needed? Regards to all..
I would like to buy a tachometer to measure the rpm of a ceiling fan. Any specifications I should consider? What type of a tachometer would be the best for this job?


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