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Bi-Directional Motor Speed Regulator - 02/05/2004 EDN-Design
Ideas....In low-noise analog circuits, a high-gain amplifier serves at
input to increase SNR. The input signal level determines
input-stage gain; low-level signals require highest gain. It is also
standard practice in low-noise analog-signal processing to make
circuit's bandwidth as narrow as possible to pass only useful
input-signal spectrum. Designed by Andrew R. Morris (added 6/06)
Car speed detection device - Door lock is easy to forget. Even if
it does not lock there is seldom case the door opens during travelling.
Even with, when you are getting a child, the child plays and may open the
door..(added 04/05/06)
Circuit for measuring motor speed uses low-cost components -
8-Nov-07 Issue of EDN A microcontroller-based circuit provides both an
LCD readout and an analog motor-speed output.... [Design Idea by R García-Gil,
J Castelló, and JM Espí, Escola Tècnica Superior d’Enginyeria, University of
Valencia, Spain]
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.... 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, eight-segment, numeric LEDs. See
movies of a thermistor in action as well as a reflective or interrupt-based
photosensor counting. (project added 11/06)
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)
LED Bargraph Optical Tachometer - For the electric R/C enthusiast, a
tachometer can be a very useful piece of equipment. When I first built this tach back
in 1995, it was essential, as there were very few off-the-shelf electric R/C power
systems that just worked….. [Stefan Vorketter]
