Safety / Protection Electronic Circuits, pg 1a

Safety / Protection Circuits, Page 1a
Safety / Protection: #-B C-D E-K L-N O-R S T-V
Last Updated on: Wednesday, November 29, 2017 05:39 AM

Circuits Designed by Dave Johnson, P.E. :

12v Battery Load Cutout Circuit
Lead-acid batteries should not be discharged below a certain point if they are to last. Also, you don’t want certain 12v powered devices, which might be plugged into a car’s cigarette lighter outlet, to drain the car battery down to a point where the car’s engine will not start. To prevent battery damage or a dead battery, the circuit below disconnects a load from the battery when the voltage dips below a fixed but adjustable voltage and will not reconnect the load until a reset button is pressed.....

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

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AN-1077: Understanding the Power Supply Requirements of PCI Bus Standard-How to Protect the Digital Components - National Semiconductor Application Note (app note added 2/06)

AN-110: Fast IC Power Transistor with Thermal Protection - National Semiconductor Application Note (app note added 2/06)

AN-1194: Failsafe Biasing of LVDS Interfaces - National Semiconductor Application Note....[App Note]

AN-246: Isolation Barrier Precisely Protects Transducer Signals - AN-246 Analog Devices Application Notes....[App Note] Through Judicious Use of Isolation Amplifiers that Incorporate Transformer Coupling, You Can Design Circuits that Accurately Condition and Amplify Low-Level Transducer Signals.

AN-249: over Voltage Protection for the ADG5XXA Multiplexer Series - AN-249 Analog Devices Application Notes....[App Note]

AN-31 Over Voltage Protection on AC Adapter Input - Application Note Microsemi 1314 (added 05/06/07)

AN-40-005 Prevention & Control of Electrostatic Discharge ESD - Application Note MiniCircuits.com (app note added 2/06)

AN-60-027 Power Supply Transient Protection for MNA & VNA Amplifiers - Application Note MiniCircuits.com (app note added 2/06)

AN-662: COP100% Based Automated Security/Monitoring System - National Semiconductor Application Note (app note added 2/06)

AN892: Fail-Safe Monitoring & Clock Frequency Switching using the PIC16f684 - Microchip Application Note Published 16-Dec-03....[App Note]

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AN-D11: ±500 Volt Protection Circuit - Supertex Semiconductors (app note added 2/06)

Asynchronous circuit latches safely - 04/28/94 EDN-Design Ideas....The circuit in Fig 1 is a digital latch that is resettable only after the condition that set the latch clears. A set input (active low] permanently latches the output (active low]. A reset input (active high] resets the output to a logic high.... [Design Idea by Paul A Kemp, NASA Johnson Space Center, Houston, TX]

Audio Amp Output Power Limiter - (electronic schematic / circuit added 4/02)

Audio Level Control Device - An automatic controlling device for sound levels implements the steps of: installing a 10 digit 7-segment on the noise measurement machine; controlling the Micom profit amplifier if an audio key was input into the Micom (added 5/02)

Automotive Relay Drivers using the Zvn4206av: Protection Free Interfacing with Avalanche Rated MOSFETs - Zetec Semiconductors Applications Notes An alternative solution is provided to usual large package Darlington effected relay driver. The ZVN4206AV has been designed, processed and rated to withstand significant energy within breakdown region. This allows part to absorb back-emf and transient energy, reby allowing lower component count circuits. (app note added 6/06)

Battery automatic power off has simpler design - 31-Mar-05 Issue of EDN Simplified circuit provides timed battery cut-off to save power.... [Design Idea by Yongping Xia, Navcom Technology, Torrance, CA; Edited by Brad Thompson]

Battery Discharge Monitor - Here is a battery monitor circuit which disconnects the load when the battery is discharged, preventing a a deep discharge which could cause permanent battery damage. The battery is automatically reconnected when a battery charger or other DC source....(electronic schematic / circuit added 4/02)

Battery Protection Circuit Allows Surges - 06/05/97 EDN-Design Ideas....Circuit monitors two lithium-ion batteries and protects both of m against Overcharging, Overdischarging, and undervoltage… [Design Idea by Ron Lenk, Temic/Siliconix, Santa Clara, CA]

Bias supply provides short-circuit protection - 09/16/99 EDN-Design Ideas.... EDN is migrating links. This link is not verified. Search the "title" EDN for new link.

Broken Charger-connection Alert - Detects if a device is not properly connected to its supply. Suitable for battery chargers, portable appliance supplies etc. (added 3/05)

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Safety / Protection: #-B C-D E-K L-N O-R S T-V