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Enhanced Battery Gas Gauge Keeps Its Data Through Glitches: 1/20/05 EDN-Design Ideas / (added 5/05) |
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GMR Sensors Manage Batteries: 09/02/99 EDN-Design Ideas / (added 6/06) The past few decades have seen remarkable progress
in magnetic-sensor technology. Early and current sensors exploit the Hall effect; more recent devices use an effect called giant magneto resistance (GMR). GMR sensors use semiconductor.... |
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LED 12 Volt Lead Acid Battery Meter: In the circuit above, a quad
voltage comparator (LM339) is used as a simple bar graph meter to indicate the charge condition of a 12 volt, lead acid battery. A 5 volt reference voltage is connected.... (added 2/07) |
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LED Battery Condition Indicator: (electronic circuit added 4/05) |
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LED Flasher Indicates Low Battery Condition: 01/02/97 EDN Design Ideas / (added 5/02) |
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LM3914 Battery Monitor: (electronic circuit added 4/05) |
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Low Battery Detector Preregulates Input Voltage: 08/15/96 EDN-Design Ideas / (added 6/06) |
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Low Battery Indicator has High Efficiency: 05/03/01 EDN-Design Ideas / (added 11/05) |
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Low Battery indicator uses Fleapower : 09/04/03 EDN-Design Ideas / (added 10/03) It is always desirable to use a
low-battery indicator that consumes as little power as possible. For a 9V, 450-mAhr alkaline battery, a 50-µA low-battery indicator can by itself run the battery down in a little more than a
year. Battery-powered devices that need to run continuously for a long time require battery indicators that consume minimal power.... |
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Low Battery Indicator uses Fleapower: 09/04/03 EDN Design Ideas / (added 1/05) It is always desirable to use a
low-battery indicator that consumes as little power as possible. For a 9V, 450-mAhr alkaline battery, a 50-µA low-battery indicator can by itself run the battery down in a little more than a
year. Battery-powered devices that need to run continuously for a long time require battery indicators that consume minimal power.... |
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Low Battery Monitor Delays System Shutdown: Maxim Application Note #134 (app note added 6/06) |
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Low Battery Voltage Cutoff Consumes Just 1 Ma: 09/11/98 EDN Design Ideas / (added 5/02) |
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Low Cost Active Load Draws Constant Battery Power: 04/13/00 EDN-Design Ideas / (added 2/06) |
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LT1304: Micropower DC/DC Converter with Independent Low-Battery Detector: DN120 Design Notes
(Linear Technology) (app note added 6/06) |
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Microamps Monitor Dual Supply Batteries: 03/03/98 EDN Design Ideas / (added 5/02) -to Low Power Circuit
monitors two 9V Batteries in a dual Supply configuration and turns on the Battery Low LED if either Battery Voltage drops below its limit |
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Micropower DC/DC Converter with Independent Low-Battery Detector (LT1304): DN120 Design Notes (Linear Technology) (app note added 6/06) |
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Model Aeroplane Navigation Strobe/Battery Level Indicator : Fair Warning, site contains annoying popups. If you are
interested in model aeroplanes and have the capital, a radio controlled electric park flyer is a must have. An RC aeroplane under 400 grams floats around like the rubber models of my
youth and contact with the ground doesn't seems to involve that sickening crunch that comes with larger models. Finding a deserted park in which to fly one (that propeller can still be
dangerous) and waiting for a windless day isn't always that easy but it sure beats driving an hour to a club field. Park flyers are definitely stress beaters and are also just plain fun.
(add 5/05) |
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Optimizing Bluetooth Device Battery Drain Measurements in Manufacturing (5988-6064en): Aligent Application Note
(added 2/06) |
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Overload and Reverse Current Circuitry Protects Battery and Load: 03/01/96 EDN Design Ideas / (added 5/02) Battery-operated
equipment is prone to the consequences of backward-installed batteries, accidental short circuits, and other careless use. The effects of a reversed battery are critical. Unfortunately, it's
difficult to guard against a reversed battery. To make equipment resistant to the reverse installation of batteries, you must design either a mechanical block to the reverse installation or an
electrical safeguard that prevents ill effects when the reverse installation occurs. Mechanical protection can be a one-way connector that accepts the battery only when oriented with the
correct polarity. For example, 9V radio batteries have mechanically dissimilar terminals,... |
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Phantom Power Battery Test Circuit: LED will light when battery is over42 volts (added 4/02) |
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Remote Charging Circuit uses Three Wire Sensing: 05/25/95 EDN Design Ideas / (added 05/02) Remote voltage sensing usually
uses a four wire sensing System, this System works with three Wires |
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Remote Control Turns Battery on and Off: 09/12/97 EDN-Design Ideas / (added 4/05) |
