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Tachometers / RPM Circuits
 

Last Updated: October 18, 2017 05:04 AM


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

80188XL Engine Tachometer / Race Computer -  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.   __ Designed by Stephen Manley-smanley @ nyx.net

A Digital Tachometer for Your Car -  Compact design features a 4-digit LED display and a bargraph.  it can also provide gearchange indication and drive a rev limiter.__ SiliconChip

Circuit Measures Diesel's Rotations Per Minute -  03/04/99 EDN Design Ideas:  (Scroll to find this one) The circuit in Figure 1 uses a Dallas Semiconductor DS1820 one-wire digital thermometer in a multipoint temperature-measurement system.  The DS1820 sensor allows distributed temperature measurement and uses only one wire for both data communication and the power supply.  You can easily connect the one-wire interface to a C (in this example, a PIC 16C63).  The application accommodates as many as 16 DS1820 sensors in a 100m-long network, dubbed MicroLAN by Dallas.  Unfortunately, with such long wires near high-current power cables, inductively coupled high-voltage peaks can cause C latch-up, because the transient-voltage suppressor, D1, cannot limit the line voltage below 9.8V.  The interface circuit in Figure 1 prevents such faults.   __ Circuit Design by David Magliocco, CDPI, Scientrier, France

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, eight-segment, numeric LEDs.  See movies of a thermistor in action as well as a reflective or interrupt-based photosensor counting.   __ Contact David Cook

Diesel Tachometer -  uses "tach" signal from alternator. (16f628)  __ Designed by Jon Fick

Digital Bike Tachometer -  This digital DiY tachometer for bikes uses two reed switches to get the speed information of the bicycle.  The reed switches are installed near the rim of the wheel where permanent magnets pass by.  The permanent magnets are attached to the wheelspokes and activate the reed switches everytime they pass by it.  The speed is__ 

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.   __ Designed by Stephen Manley-smanley @ nyx.net

Digital Speedometer -  This instrument displays the speed of the vehicle in kmph.  An opaque disc is mounted on the spindle attached to the front wheel of the vehicle.  The disc has ten equidistant.__ Electronics Projects for You

Digital speedometer for cars with 7-segment display of speed -  This page describes the digital speedometer I built in 1995 for my Datsun 1200 __ Designed by Martin Pot

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 t __ Circuit Design by Tan Van Nguyen, IBM SSD Division, San Jose, CA

Digital Tachometer for Your Car -  Compact design features a 4-digit LED display and a bargraph.  it can also provide gearchange indication and drive a rev limiter.__ SiliconChip

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.   __ Designed by Stephen Manley-smanley @ nyx.net

LED Strobe & Contactless Tachometer -  This versatile LED Strobe & Tachometer can be used to observe and measure the RPM of rotating machinery.  it offers three different measurement methods and the readout is via a 2-line LCD module.__ SiliconChip

Led Strobe & Tacho Pt.2 -  Last month, we published the circuit of our new LED Strobe & Tachometer and showed how to build the main unit and the strobe light.  This month, we describe the assembly of the optional Photo-interruptor and IR Reflector Amplifier boards.  We also describe how the unit is used.__ SiliconChip

LED Tachometer with Dual Displays, Pt.1 -  A responsive and accurate tachometer is essential for motoring enthusiasts.  This new unit features a bright 4-digit display plus a 32-LED circular bargraph.  The LED bargraph responds rapidly to changes in RPM while the digital display shows accurate RPM readings with a steady throttle.__ SiliconChip

Liquid Level Tach Transmitter -  Schematic  __ Designed by Jon Fick

Measures diesel's rotations per minute -  03/04/99 EDN Design Ideas:  (Scroll to find this one) The circuit in Figure 1 uses a Dallas Semiconductor DS1820 one-wire digital thermometer in a multipoint temperature-measurement system.  The DS1820 sensor allows distributed temperature measurement and uses only one wire for both data communication and the power supply.  You can easily connect the one-wire interface to a C (in this example, a PIC 16C63).  The application accommodates as many as 16 DS1820 sensors in a 100m-long network, dubbed MicroLAN by Dallas.  Unfortunately, with such long wires near high-current power cables, inductively coupled high-voltage peaks can cause C latch-up, because the transient-voltage suppressor, D1, cannot limit the line voltage below 9.8V.  The interface circuit in Figure 1 prevents such faults.   __ Circuit Design by David Magliocco, CDPI, Scientrier, France

Microcontroller-Based Tachometer -  A tachometer is nothing but a simple electronic digital transducer.  Normally, it is used for measuring the speed of a rotating shaft.  The number of revolutions per minute (rpm) is valuable...__ Electronics Projects for You

Optical tachometer provides bidirectional info -  05/21/98 Design ideas - (Multiple circuits listed, scroll to find this one) Optical tachometers have many advantages in precision servo applications.  Compared with dc-generator types, optical tachs are relatively inexpensive and, because they lack wear-prone commutator brushes, they're long-lived.  Frequency-to-voltage conversion circuits provide a convenient means to integrate the output of optical tachs into analog, unidirectional motion-control loops.  However, for bidirectional servos, where you need a bipolar angular-velocity readout, you need a more unconventional solution, such as the circuit in Figure 1.    __ Circuit Design by Stephen Woodward, University of North Carolina, Chapel Hill

Simple 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.  The scheme in Figures 1 and 2 allows __ Circuit Design by David Magliocco, CDPI, Scientrier, France

Speed Limit Alarm -  Wireless portable unit; Adaptable with most internal combustion engine vehicles __ Contact Flavio Dellepiane, fladello @ tin.it

Tach Rotor Adapter -  TRA Kit comes with a custom PCB board with required components and a case. __ Contact Jameco Electronics

Tacho & Dwell Meter -  This circuit as first published in Wireless World September 1975 and subsequently in MECRM.  it's built around a TTL quad NOR gate, though CMOS could be used (with minor alterations to the circuit).   __ Designed by Richard Torrens

Tachometer -  A tachometer is an instrument that measures the rotational speed of a shaft or disk in a motor or other machine.  Here we present the basic version of the tachometer that shows the revolutions per second (RPS) on a digital display.   __ Designed by Najib Ghatte

Tachometer -  A simple tachometer circuit using one NPN transistor.   __ Designed by Jose Pino

Tachometer -  Here is a simple circuit that can be used as a tachometer.  The circuit is basically a frequency to current converter which converts the incoming signal into a proportional current to drive the meter.  The deflection on the ammeter will __ Designed by Jose Pino

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 provide as updated speed data.  The circuit provide as corrections for variations in excitation amplitude and frequency __ Circuit Design by Ed Guenther, Tektronix Redmond, OR

Tachometer for Bikes (circuit) -  Here are some instructions how to connect the Tachometer version iI to a single cylinder.   __ Designed by Jose Pino

Tachometer(digital) 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 t __ Circuit Design by Tan Van Nguyen, IBM SSD Division, San Jose, CA

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.   __ Designed by Jose Pino

Tachometer/RPM II -  This is an improved version of the Tachometer created specially to measure up to 9, 999 RPM.  Uses a PIC  16F628.   __ Designed by Jose Pino

Wireless Auto Tachometer -  Anyone performing their own automobile tune-ups knows how important it is to know your engines speed.  With this tachometer, you can measure your engines speed without any connections or annoying timing lights.   __ Designed by Aaron Cake


Tachometers / Revolutions Per Minute Monitors (RPM) Circuits

 


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