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  Safety / Protection Circuits, Page 4
Safety / Protection:  #-B     C-D     E-K    L-N     O-R      S      T-V
Last Updated on: Saturday, August 30, 2014 10:28 AM


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

Lightning Protection for Aircraft Electrical Systems -  MicroNote 127 from Microsem....[App Note]
Lightning Protection for Aircraft per RTCA/DO-160D for ARINC 429 Protocol -  MicroNote 126 from Microsem....[App Note]
Logic PSU with OverVoltage Protection -  6 volt regulated power supply for TTL and 74LS series integrated circuits, includes output Overvoltage fault protection… [Andy Collison, designer]
Loud Speaker Protection & Muting -  Protect speakers from turn-on and turn-off transients and amplifier faults    (electronic schematic / circuit added 4/02)
Low-error platinum RTD circuit has shutdown capability -  09/14/00 EDN-Design Ideas....Resistor-temperature detectors (RTDs), are the most stable and popular temperature sensors. Platinum RTDs allow for a much wider range of temperatures than silicon-based sensors. In many cases, platinum RTDs sit far from the measurement circuitry, which adds a great deal of error into the measurement system. The circuit in.... [Design Idea by Reza Moghimi, Analog Devices, Santa Clara, CA]
Method offers fail safe variable reluctance sensors -  22-Nov-01 Issue of EDN  Variable-reluctance sensors are preferred for industrial and automotive environments, because they sustain mechanical vibration and operation to 300°C. In most applications, they sense a steel target that is part of a rotating assembly. Because the unprocessed signal amplitude is proportional to target speed, a sensor whose signal-processing circuitry is designed for high speed cease.... [Design Idea by Phil Levya, Maxim Integrated Products, Sunnyvale, CA]
Method provides automatic machine shutdown -  27-May-04 Issue of EDN  Some machines need to run for long periods and therefore may finish their work in the middle of the night or during the weekend. For the time remaining, until the operator returns, the machines stay idle, uselessly consuming power.  This Design Idea allows a machine to completely shut itself down after finishing its work.... [Design Idea by Jean-Bernard Guiot, Mulhouse, France]

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Method provides overpower protection for quasiresonant supplies -  28-Oct-04 Issue of EDN  The main characteristic of quasiresonant switch-mode power supplies is that they exhibit a varying frequency when the input voltage changes. For a flyback power supply, the power delivered to the output obeys the following equation  POUT=1/2(LP×IP 2×FSWη], where LP is the primary inductance, IP is the peak primary current, FSW is the switching frequency, and η is the e.... [Design Idea by Nicolas Cyr, On Semiconductor, Toulouse, France]
Microcontroller protects DC-motor -  17-Feb-05 Issue of EDN  Although any overloaded dc motor can draw excessive current and sustain damage, a cooling fan's motor is particularly vulnerable due to fouling by dust, insects, or misplaced objects. A few fans include built-in overload protection, and others can use an external warning device, such as Microchip's TC670 fan-failure detector.... [Design Idea by Abel Raynus, Armatron International Inc, Malden, MA]
Monitor & Protect Automotive Systems with Integrated Current Sensing -  DN374  Design Notes (Linear Technology)  (app note added 1/06)
MOSFET Beats Murphy's Law -  12/22/94 EDN-Design Ideas.... EDN is migrating links. This link is not verified.  Search the "title" + "EDN" for new link.
Motor uses simple reverse-battery protection -  18-Mar-04 Issue of EDN This Design Idea presents a low-side, reverse-battery-protection technique for a dc-motor system. The system in Figure 1 incorporates two protection options. The common practice of using a diode for reverse-battery protection does not work with dc motors' inductive loads. In Figure 1, an Allegro (www.... [Design Idea by Dongjie Cheng, Allegro Microsystems, Warminster, PA]
New 8051SBC -  Brown-out protection, WDT, 20x4 LCD BUS interface. Simple scope using Nokia 3310 LCD.  ….(electronic schematic added 06/09)

 
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