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Comparator Circuits
Page 3
Comparators:
#-A B-C
D E-R
S-Z
Last Updated on:
Wednesday, October 28, 2009 02:36 PM |
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| 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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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. 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. .... ….(designed by David A. Johnson) |
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Design an Efficient Reset Circuit - 05/01/03 EDN-Design Ideas: When you work with
microprocessors, you must ensure that when the power-supply voltage fluctuates to the
minimum permissible level, VL, that the processor's ALU continues to operate normally.
Also, when you switch on the power supply, the ALU must operate normally when the
supply voltage equals or exceeds a certain high level, VH.....(design idea added 1/05) |
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Design low duty cycle timer circuits - 08/22/02 EDN-Design Ideas: Designing
astable circuits using the industry-standard 555 timer is a straightforward process
when duty cycles are 50% or greater. However, you must overcome the many pitfalls of
low-duty-cycle circuits to arrive at a desired result. Using only ideal components
eases the design, but the components themselves are hard to obtain.....(design idea
added 1/05) |
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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 - 09/18/03 EDN-Design
Ideas: 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 added 10/03) |
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Dual Comparators Stabilize Proximity Detector - 02/16/98 EDN-Design Ideas: (design
idea added 5/03) |
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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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