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Safety /
Protection Circuits, Page 6
Safety / Protection: #-B
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Last Updated on:
Monday, October 03, 2011 06:07 PM |
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Links to electronic circuits, electronic schematics, designs for engineers,
hobbyists, students & inventors:
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Safely swap SCSI disk drives - 09/30/99 EDN-Design Ideas....When you
insert an SCA2 (single-connector attach] drive into a live backplane, the power
supply's bypass capacitors in the drive can draw huge transient.… [Design
Idea by Ajmal Godil, Linear Technology Corp, Milpitas, CA] |
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Safety device uses GMR sensor - 10-Jul-03 Issue of EDN This Design
Idea presents a differential safety device to prevent risks arising from current
leakages in household applications. The proposed circuit uses a new method for
differential current sensing... [Design Idea by J Pelegri-Sebastia and D
Ramirez-Munoz, University of Valencia, Spain] |
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Short circuit protected Power Supply from PC 12V supply - (electronic
circuit added 4/05) |
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Short-Circuit Beeper - (schematic / circuit added 6/07) |
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Short-Circuit Protection for Boost Regulators - DN154 Design
Notes (Linear Technology) (app note added 1/06) |
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Shunt regulator provides overvoltage protection - 15-Jan-98 Issue of
EDN The circuit in Figure 1 uses a typical technique for varying the
output voltage of a power supply via a programmable control voltage. Although
the topology and schematic details of the power supply....[This Design Idea by
ROBERT N BUONO, MAHWAH, NJ] [Design Idea by ROBERT N BUONO, MAHWAH, NJ] |
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Simple circuit indicates health of lithium-ion batteries - 14-May-09 Issue of
EDN A simple inexpensive circuit quickly indicates a battery pack's health....
[Design Idea by Fritz Weld, Friedberg, Germany] |
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Simple Circuit Safely Deep-Discharges NiCd Battery - Circuit is powered by the
battery being discharged, LED flashes near end-of-charge. Ultra-low current drain won't
harm battery if left connected.… [Jim Haggerman, Hagerman Technology LLC] |
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Simple circuit safely deep-discharges NiCd battery. - 04/29/99 Issue of EDN
Nickel-cadmium (NiCd] batteries can possess an undesirable memory effect due to partial
discharges. The remedy is a complete discharge before charging again. Figure 1a shows a
simple circuit that performs this feat....Page includes several designs. Scroll to
find this one.... [Design Ideas by Jim Hagerman, Science & Technology International,
Honolulu, HI] |
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Simple Electronic Circuit Breaker - This circuit uses the on-resistance of the
MOSFET as the current sensor. Reset it by removing the input power or the load. The
circuit draws no current unless tripped. Designed by Andrew R. Morris (added
09/05) |
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Single transistor provides short-circuit protection - 16-Oct-03 Issue of EDN
In certain dc/dc-converter applications, on-chip, cycle-by-cycle current limit may be
insufficient protection to prevent a failure during a short circuit. A nonsynchronous
boost converter provides a direct path from the input to the short circuit through the
inductor and the catch diode. Regardless of current-limit protection in the IC, when a
short circuit exists in the load, extremely high cu.... [Design Idea by Keith Szolusha,
Linear Technology Corp, Milpitas, CA] |
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Smart switch cuts transformer turn-on current - 04/23/98 EDN-Design
Ideas....Transformer-core saturation can cause inexplicable fuse blowing, system crashes,
or premature switch and relay failure. When a core saturates, it loses its inductive
characteristics; primary winding....File contains multiple circuits scroll to find this
circuit.... [Design Idea by Robert Lindsey, Hansvedt EDM, Urbana, IL] |
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Solid-state flasher has Short Circuit Protection - 01/16/97 EDN-Design
Ideas....Switches an inductive or resistive grounded load using a bootstrapped n-channel
power MOSFET and features short-circuit, reverse-polarity, and
transient-input-voltage-spike protection, operates from18 to30-Volt DC, and the circuit
can handle as much as approximately10A with proper heat sinking of the FET.... [Design
Idea by Navdhish Gupta, TDF Corp, Naperville, IL] |
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Spark detector uses proximity - 27-Nov-08 Issue of EDN Use a Hall-effect
sensor to measure engine rpm with a voltmeter.... [Design Idea by Robert Most, Ferris
State University, Big Rapids, MI] |
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Spark gaps Provide ESD Protection - 09/01/97 EDN-Design Ideas.... EDN is
migrating links. This link is not verified. Search the "title" + "EDN" for new link.
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Speaker Protector - (electronic diagram added 6/03) |
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Stabilized Power Supply With Short Circuit Protection - Here is an efficient
4-stage stabilized power supply unit for testing electronic circuits. It provides well
regulated and stabilized output, which is essential for most electronic circuits to give
proper results. The circuit provides an audio- visual indication if there is a short
circuit in the PCB under test, so the power supply to the circuit ‘under test’ can be
cut-off immediately to save the valuable components from damage. ….(electronic schematic
added 11/08) |
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Switcher improves overvoltage protection circuit - 10-Jun-04 Issue of EDN
Overvoltage-protection circuits often protect electronic devices from power-supply
transients, such as a rise from plugging in batteries or an external power adapter.
Although these devices traditionally find use as hysteretic switching controllers, you can
reconfigure the LM3485 (Figure 1] to provide a robust overvoltage-protection circuit....
[Design Idea by Jason Rubadue, National Semiconductor, Thornton, CO] |
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Synchronize asynchronous reset - 01/06/00 EDN-Design Ideas....Synchronous reset
and asynchronous reset are both common reset mechanisms for state machines, and the reset
circuit in Figure 1 combines the advantages of each. Synchronous reset has the advantage
of synchronization between clock and reset signals, which prevents race conditions from
occurring between the clock and the reset signal. However,.... EDN is migrating links.
This link is not verified. Search the "title" + "EDN" for new link. |
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Safety / Protection:
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