About Strobe tachometer (RPM meter)
STROBE TACHOMETER When the flicker frequency of light coincides with the speed of any object, such as a fan, the rotating fan may appear to be stationary. Changing the frequency of the flicker of light may help detect the...
STROBE TACHOMETER
When the flicker frequency of light coincides with the speed of any object, such as a fan, the rotating fan may appear to be stationary. Changing the frequency of the flicker of light may help detect the rotation speed.
You may easily use the flicker frequency control buttons to quickly assign the flicker frequency with an accuracy of 0.0001 Hz (0.01 RPM):
• Up to 1000 Hz (60 000 RPM) for a connected flashlight (see the video on YouTube: https://youtu.be/iq6Xiums05o).
• Up to 100 Hz (6000 RPM) for the iPhone flashlight.
IF THE SPEED IS MORE THAN UPPER LIMIT, YOU MAY STILL DETERMINE THE SPEED BY FIRST MAKING MEASUREMENTS WITH A LOWER FLICKER FREQUENCY AND THEN MAKING A SIMPLE CALCULATION (AS EXPLAINED IN THE APPENDIX).
To change the frequency, you should simply press and hold the button. In the app settings, you can adjust the speed at which the flash rate changes when you press and hold the button. The flicker frequency can be displayed either in Hz or RPM.
The image you see will be sharper in lower external light.
After a long period of usage, in case of overheating, the iPhone flashlight turns off automatically.
LASER TACHOMETER
• Measurement range from 0.3 Hz (18 RPM) to 1000 Hz (60 000 RPM).
• Step 0.01-0.0001 Hz (1-0.01 RPM).
• Update time 1 sec.
• 5 mW laser power required.
MAGNETIC TACHOMETER
This tachometer operates by measuring the magnetic field from a spinning magnet. The magnetic field is measured by the iPhone's magnetometer. The magnetic tachometer is best suited for measuring low rotation speeds (from 6 revolutions per minute). It can also be used for measuring medium rotation speeds (up to 2,700 RPM), but at such speeds there is a risk of spontaneous tearing away of the magnet and strong vibration due to center-of-gravity shift.
• Measurement range from 0.1 Hz (6 RPM) to 45 Hz (2,700 RPM).
• Step 0.2-2 %.
• Update time 2-5 sec.
Sep 10, 2023
Version 3.6.3
• Minor changes in text design.
Previous Versions
Here you can find the changelog of Strobe tachometer (RPM meter) since it was posted on our website on 2016-10-01 16:41:36.
The latest version is 3.6.3 and it was updated on 2024-04-22 08:54:28. See below the changes in each version.
Strobe tachometer (RPM meter) version 3.6.3
Updated At: 2023-09-10
Changes: Sep 10, 2023
Version 3.6.3
• Minor changes in text design.
Strobe tachometer (RPM meter) version 3.6.2
Updated At: 2023-09-03
Changes: Sep 3, 2023
Version 3.6.2
• Bug fixes.
Strobe tachometer (RPM meter) version 3.6.1
Updated At: 2023-08-10
Changes: Aug 10, 2023
Version 3.6.1
• For iOS 16+, the flash duration has been increased when using the iPhone LED. This increases the brightness of the flash, but makes the mark more blurry. If before this update your iPhone LED flashed bright enough and this update made the label too blurry, then let me know.
Strobe tachometer (RPM meter) version 3.6
Updated At: 2022-12-31
Changes: Dec 31, 2022
Version 3.6
• Setting the rate at which the flash frequency changes when the button is pressed and held.
Strobe tachometer (RPM meter) version 3.2.2
Updated At: 2014-03-13
Disclaimer
Official App Store Link
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