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Tachometers / RPM Circuits
Last Updated on: Saturday, August 30, 2014 10:28 AM


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

80188XL Engine Tachometer -  (circuit / schematic design added 6/06)
AN-162: LM2907 Tachometer/Speed Switch Building Block Applications -  National Semiconductor Application Note  (app note added 2/06)
AN-236: Speed Measurement & Control with the AD2S83, Silicon Tachogenerator -  AN-236 Analog Devices Application Notes....[App Note]
Circuit Measures Diesel's Rotations Per Minute -  03/04/99 EDN-Design Ideas....You may find it useful to measure a diesel engine's rotations per minute to accurately adjust the idling or to compare the motor's speed under hot and cold conditions, for example. Not all cars or trucks come with a tachometer.... EDN is migrating links. This link is not verified.  Search the "title" + "EDN" for new link.
Combination Tachometer, Thermometer, & Counter -  Inspired by the need to measure dc motor speed and detect overheating, this 68HC908KX8 microcontroller-based circuit displays various statistics on six-digit,....
Computer Fan Speed Tacho Out Circuit: Add a Fan Speed Monitor Lead to Any 12V Two Wire Fan.  -  Add a fan speed monitor lead to any 12V two wire fan.  You will find this identical circuit inside most 3 wire computer fans with speed monitoring output to the motherboard.  Peel off the sticker from the fan hub in order to access a motor winding pin for connecting up the tacho circuit.... [Circuit by Stepan Novotill]

Digital Engine/Race Computer Board -  The objective of this project is to design a high speed digital engine tachometer.  This requires the design and development of a hardware and software solution to monitor the status of an engine in real time. In addition, information relating to the overall health and systems of the vehicle can be displayed.  (added 10/05)
Digital Tachometer Avoids Analog Vices -  11/10/94 EDN-Design Ideas....The digital tachometer in Fig 1a is a component of the digital seek servo loop in Fig 1b. The loop produces an error signal that causes a motor to follow a sophisticated velocity profile (Fig 2]. Although you could use an analog tachometer, the digital one costs less, performs better, is less sensitive to temperature, and implements easier in a custom IC.... [Design Idea by Tan Van Nguyen, IBM SSD Division, San Jose, CA]
Engine/Race Computer Board -  The objective of this project is to design a high speed digital engine tachometer.  This requires the design and development of a hardware and software solution to monitor the status of an engine in real time. In addition, information relating to the overall health and systems of the vehicle can be displayed.  (added 10/05)
LM2907 Tachometer/Speed Switch Building Block Applications -  National Semiconductor Application Note  (app note added 2/06)
Optical Tachometer Provides BiDirectional Info -  05/21/98 EDN-Design Ideas....Many systems, especially communications, require AGC that functions at 50 MHz. Self-calibrating systems, such as automatic test equipment, need this high-frequency response but also require digital control of the AGC output voltage. During the calibration cycle, the test equipment calculates the AGC output voltage necessary to achieve....file has several circuits, pleaas scroll to find this one.... [Design Idea by Stephen Woodward, University of North Carolina, Chapel Hill]
Simple circuit measures diesel's rotations per minute -  03/04/99 Issue of EDN  You may find it useful to measure a diesel engine's rotations per minute to accurately adjust the idling or to compare the motor's speed under hot and cold conditions, for example. Not all cars or trucks come with a tachometer. The scheme in Figures 1 and 2 allows you to measure....Page includes several designs.  Scroll to find this one....(EDN  Design Ideas] [Design Idea by David Magliocco, CDPI, Scientrier, France]
Speed Limit Alarm -  (circuit added 9/04)
Speed Measurement & Control with the AD2S83, Silicon Tachogenerator -  AN-236 Analog Devices Application Notes....[App Note]
Tachometer Avoids Analog Vices -  11/10/94 EDN-Design Ideas....The digital tachometer in Fig 1a is a component of the digital seek servo loop in Fig 1b. The loop produces an error signal that causes a motor to follow a sophisticated velocity profile (Fig 2]. Although you could use an analog tachometer, the digital one costs less, performs better, is less sensitive to temperature, and implements easier in a custom IC.... [Design Idea by Tan Van Nguyen, IBM SSD Division, San Jose, CA]
Tachometer Circuit -  A simple tachometer circuit using one NPN transistor. (12/04/2007)
Tachometer Demodulator has Fast Response Time -  12/07/95 EDN-Design Ideas.... When a tachometer is a critical part of overspeed-shutdown circuitry, the response time of conventional demodulators may be too long. The circuit in the block diagram in Figure 1 provides updated speed data. The circuit provides corrections for variations in excitation amplitude and frequency.... EDN is migrating links. This link is not verified.  Search the "title" + "EDN" for new link.
Tachometer for Bikes (circuit) -  Here are some instructions how to connect the Tachometer version II to a single cylinder. (design added 3/07)
Tachometer/RPM -  Easy to build using only a few components. With some modifications, it can be used in an automovil.  This Tachometer uses a PIC 16F628.(design added 06/04)
Tachometer/RPM II -  This is an improved version of the Tachometer created specially to measure up to 9,999 RPM. Uses a PIC 16F628. (added schematic 04/06)
Wireless Auto Tachometer (Aaron Cake) -  (electronic schematic / circuit added 04/03/02)

Tachometers / RPM Circuits

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