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Comparator Circuits
Page 3
Comparators:
#-A B-C
D E-R
S-Z
Last Updated on:
Monday, October 03, 2011 06:08 PM |
| Circuits
Designed by Dave Johnson, P.E. : |
- DC
CURRENT INDICATOR #4 December 15, 2008
The circuit below uses some common components to turn on an LED whenever DC current
above a certain level is detected. The circuit uses a very popular LM393 dual
voltage comparator from National Semiconductor and a common 1N4148 signal diode.
The diode acts as a crude 0.7v voltage reference. Only one of the comparators
inside the 8 pin package is used. A pair of resistors across the diode forms a
voltage divider, which produce a reference voltage of about 0.015v. ....
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DC Current Indicator 6 - The circuit below is a simple way to indicate
when DC current is flowing through a wire. The circuit is designed so it will
turn on a LED indicator light, whenever the voltage drop across a shunt resistor
exceeds about 0.1 volts. The value of the resistor can be selected based on
the desired current flow. Although I show a circuit for 12v operation, the circuit
can be used over a wide range from 3v to perhaps 24v....
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Links to electronic circuits, electronic schematics, designs for engineers, hobbyists,
students & inventors:
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DC Current Indicator #4 - The circuit below uses some common
components to turn on an LED whenever DC current above a certain level
is detected..... [Designed by David A. Johnson] |
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DC Current Indicator 6 - The circuit below is a simple way
to indicate when DC current is flowing through a wire. The
circuit is designed so it will turn on a LED indicator light....
[Designed by David A. Johnson] |
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Design an efficient reset circuit - 1-May-03 Issue of EDN
When you work with microprocessors, you must ensure that when the
power-supply voltage.... [Design Idea by Guillermo Bosque, Asesoría e
Integracion de Tecnologías, Urduliz, Spain] |
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Design low-duty-cycle timer circuits - 22-Aug-02 Issue of
EDN Designing astable circuits using the industry-standard 555
timer is a.... [Design Idea by Phil Rogers, Texas Instruments Inc,
Rockwall, TX] |
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Detection for Day & Night - The following is a method to
allow day and night detection using Infrared/Visible light sensitive
phototransistors and a simple LM339 voltage comparator circuit. [from
Rob Paisley's Model Train web site] |
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Double Dual Limit Window Comparator - Circuit Ideas for Designers
Application Notes Advanced Linear Devices, Inc. (app note added 7/06)
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Dual Comparator - forms temperature-compensated proximity Detector (app
note added 5/03) |
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Dual comparator thermally protects lithium-ion battery - 18-Sep-03 Issue
of EDN Most manufacturers recommend that you don't change lithium-ion
batteries at temperatures lower than 0°C or higher than 50°C. You can monitor both
thresholds by adding a thermistor and dual (window] comparator to a lithium-ion
battery charger (Figure 1]. Set the low-temperature trip point at 2.... [Design
Idea by Mike Hess, Maxim Integrated Products, Sunnyvale, CA] |
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Dual comparators stabilize proximity detector - 02/16/98 EDN-Design
Ideas In the proximity detector of Figure 1, a 4-in.-sq piece of
copper-plated pc board serves as an antenna that forms one plate of a capacitor.
An approaching (grounded] person serves as the other plate, producing a
capacitance value.... [Design Idea by Arthur Harrison, US Army Research
Laboratory, Adelphi, MD, and Joseph Stern, Maxim Integrated Products, Sunnyvale,
CA] |
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Dual Limit Photo-Detector Monitor - Circuit Ideas for Designers
Application Notes Advanced Linear Devices, Inc. (app note added 6/06)
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Dual Limit Window Comparator - Circuit Ideas for Designers Application
Notes Advanced Linear Devices, Inc. (app note added 6/06) |
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Dual Micropower Comparator with Integrated 400MV Reference Simplifies Monitor &
Control Functions - DN321 Design Notes (Linear Technology) (app
note added 1/06) |
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Comparators: #-A
B-C D
E-R
S-Z
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