Safety /
Protection Circuits, Page 5
Safety / Protection: #-B
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Last Updated on:
Wednesday, November 29, 2017 05:39 AM |
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Links to electronic circuits, electronic schematics, designs for engineers,
hobbyists, students & inventors:
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Open-collector output provides fail-safe operation - 4-Sep-03 Issue of
EDN It is common practice to use digital open-collector outputs for
control units in industrial applications. Using these outputs, you can switch
loads, such as relays, lamps, solenoids, and heaters. One possible problem
inherent to this type of output stage is a short circuit from the output to the
supply voltage (often, 24V].... [Design Idea by Susanne Nell, Breitenfurt,
Austria] |
Output Power Limiter - Just the thing if you want to limit amplifier
power to something "sensible" (circuit added 6/07) |
Over Voltage Protection - Safety devices like fuses provide protection
against excess current, but do nothing for transients and short duration spikes
of high voltahe on the power supply lines. This circuit uses the "crowbar"
method and provides fast protection against transient voltage spikes(Circuit
design by Andy Collison added 07/07/07) [Andy Collison] |
Over Voltage Protection for the ADG5XXA
Multiplexer Series - AN-249 Analog Devices Application Notes....[App Note]
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Over Voltage Protection on AC Adapter Input
AN-31 - Application Note 31 from Microsem....[App Note] |
Over-/Under-Voltage Protection of Electrical Appliances - ....
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Overload & Reverse Current Circuitry Protects Battery & Load - 03/01/96 EDN-Design
Ideas....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 ,.... EDN is migrating links. This link is not verified. Search the "title"
EDN for new link. |
Overvoltage Circuit - A simple 5 Volt regulated PSU featuring overvoltage
protection. [Andy Collison] |
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OverVoltage Protection for LM317 - This circuit is a modified version of an
original interface on QSL Net. It is a fully isolated interface allowing computer control
of the Trio/Kenwood R5000 receiver. Separate software is needed to control the receiver.
(electronic schematic / circuit added 4/02) [submitted by Adam] |
PIC Speaker Protection - This doesn't replace P33, but it is possibly the
ultimate speaker protection. .... |
Polarity protector outperforms Schottky diodes - 6-Feb-03 Issue of EDN The
polarity-protection circuit in Figure 1 is a high-performance alternative to the usual
series diode (often Schottky]. The circuit incurs a much lower voltage drop than even the
best Schottky diode. The circuit uses MOSFET devices because of their low on-resistance.
For the transistors in this design, the combined on-resistance is 0.... [Design Idea by
Mike Hovenga, BAE Systems, Austin, TX] |
Power Supply Transient Protection for MNA & VNA Amplifiers - AN-60-027
Application Note MiniCircuits.com (app note added 04/05/06) |
Power Supply-On/Off-protection - .... |
Power-line outage flashes red alert - 13-Jun-02 Issue of EDN This Design Idea
expands on a circuit in a previous one to configure a power-outage detector with a
flashing alarm (Figure 1, Reference 1]. The circuit plugs into a mains outlet and uses
trickle-charged nickel-cadmium batteries. The green-LED monitors the presence of line
voltage. The BZV55-C4V3 zener diode, D1 protects the batteries against overvoltage....
[Design Idea by Vasiliy Borodai, Zaporozhje, Ukraine] |
Power-Supply Failure Alarm - .... |
Power-supply interrupter fights ESD-induced device latch-up - 21-Jul-05 Issue of
EDN Optoisolator-based circuit protects digital components from ESD.... [Design Idea
by Emerson Segura, Lifescale Global Diagnostics Inc, Toronto, ON, Canada; Edited by Brad
Thompson and Fran Granville] |
Prevention & Control of Electrostatic Discharge ESD - AN-40-005
Application Note MiniCircuits.com (app note added 04/05/06) |
Protecting & Monitoring Hot Swappable Cards in High Availability Systems - DN360
Design Notes (Linear Technology) (app note added 1/06) |
Protecting USB Data I/O Ports - MicroNote 117 from Microsem....[App Note]
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Protection Circuit Covers a Wide Range - 07/17/97 EDN-Design Ideas.... EDN is
migrating links. This link is not verified. Search the "title" + "EDN" for new link.
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Protection for your Electrical Appliances - .... |
RS-232 OverVoltage Protection Circuits - (electronic schematic / circuit added
4/02) |
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