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Battery Monitor Draws 8
�or Less:
04/13/95 EDN-Design Ideas
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Battery Monitor Emulates
Auto Dashboard:
07/03/97 EDN-Design Ideas
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Cigarette Lighter 9 Volt
Adapter:
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Circuit Detects &
Disconnects Overvoltages:
04/25/96 EDN-Design Ideas
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Circuit Detects total
OnTime:
02/04/99 EDN-Design Ideas / PDF
contains multiple circuits - scroll to
find circuit. |
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Circuit Measures
Microvolts In The Presence Of Volts
: 08/23/04
Electronic Design - Design Briefs /
Sometimes, it's necessary to make
microvolt measurements in the presence
of volts. For example, the need arose to
measure the thermoelectric potentials in
an RTD circuit in which the 10 V applied
to self-heat the RTD made measuring such
tiny).... |
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Circuit Provides 1.5V,
7Bus Termination:
09/14/95 EDN-Design Ideas
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Circuit safely applies
power to ICs:
11/22/2001 EDN - Design Ideas /
Supervisory circuits normally monitor a
microprocessor's supply voltage,
asserting reset to the IC during
power-up, power-down, and brownout. In
this way, the circuit ensures that the
supply voltage is stable before the
microprocessor boots, thus preventing
code-execution errors. Many analog and
digital ICs also need a well-behaved
start-up of their supply to avoid
latch-up and logic-stat... . |
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Clamping Circuit
Dissipates Minimal Power:
03/30/00 EDN-Design Ideas / PDF contains
multiple circuits - scroll to find the
one of interest / This circuits is a
quasi-linear regulator
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Cockcroft Walton Diode
Voltage Multipliers:
this document describing some basic
voltage multiplier circuit topologies,
PDF file |
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Comparator Detects Failed
Telecomm Supplies:
06/22/00 EDN-Design Ideas / PDF
contains multiple circuits - scroll to
find the one of interest / Detects when
telecomm power supplys48V output drops
below its nominal value, uses an
isolated comparator to monitor two48V
telecomm supplies (of either polarity) /
PDF contains multiple circuits - scroll
to find the one of interest
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Comparator Features
Symmetrical Thresholds:
03/06/00 Electronic Design - Ideas for
Design / The comparator often is the
simplest bridge between analog and
digital worlds, but crossing this bridge
isn't as simple as might be thought.
Keep in mind, we are leaving the analog
world with an indefinite number of
states and entering into a vastly. . . |
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Contactless AC Mains
Voltage Detector:
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DC Power Supply:
simple circuit based on 78xx fixed
voltage regulator IC, those ICs are
available for some fixed voltages
between5 and24V |
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Generate Dual Voltages
That Track By Percentage Of Range:
06/09/03 Electronic Design - Design
Briefs / Consider the need to vary two
voltages, V1 and V2, by an equal
percentage of their ranges (V1MAX -
V1MIN) and (V2MAX - V2MIN), with V1MAX,
V1MIN, V2MAX, and V2MIN. . . |
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Internal Oven Provides
Voltage Reference Less Than 1-ppm/�C
Drift:
04/03/00 Electronic Design - Ideas for
Design / When precision
voltage-reference requirements demand
less than 1-ppm/�C temperature drift,
the designer can choose to use expensive
components (off-the-shelf modules) or
build a custom oven enclosure. This
second choice is common among. . . |
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Latching Regulator
Prevents Deep Discharge:
03/16/95 EDN-Design Ideas
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Low Voltage Alarm:
NE555 Low Voltage Battery Disconnect
Circuit |
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Low-voltage oscillator
features increased spectral purity:
11/02/98 Electronic Design - Ideas for
Design / A common problem in crystal
sinusoidal oscillators is the excitation
of unwanted modes of the quartz crystal
that degrade the spectral purity of the
oscillator. This problem is significant
in overtone crystals, particularly if
the oscillator is. . . |
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Low-Voltage Series
Reference Draws Only 2.4 μA:
08/20/01 Electronic Design - Ideas for
Design / For systems with
miniscule power budgets, implementing a
low-power voltage reference involves
many compromises. One design option is
the low-voltage shunt reference.
Available since the birth of the bandgap
cell, this device traditionally
operates. . . |
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Maximum Voltage Sorter
uses Analog Multiplexers:
09/29/94 EDN-Design Ideas
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OpAmp Rectifier Signals
Input State:
07/21/94 EDN-Design Ideas
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Simple Circuit Detects
Voltage over Ranges:
10/10/96 EDN-Design Ideas
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Simple Circuit
Disconnects Load From Battery:
03/14/96 EDN-Design Ideas
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Solid State Relay Saves
Battery's Life:
09/01/94 EDN-Design Ideas
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Status Indicator Flags
Five Discharge States:
01/20/94 EDN-Design Ideas / The circuit
actually indicates five conditions of
the battery. A steady glow assures the
user that the battery is strong and
healthy. A2-Hz brief flicker off
indicates that the battery is starting
to show age. A more insistent,50%,5-Hz
flashing is a warning to have a spare
battery on hand. A brief flicker on at2
Hz is the battery's last gasp. And, when
the LED is continuously off, its Time to
replace the battery. |
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Supervisory IC Makes
Simple Line Monitor:
03/01/96 EDN-Design Ideas
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NE555 Low Voltage Battery
Disconnect Circuit:
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Ultimate Battery Low
Voltage Alarm: |
