Safety
/ Protection Circuits, Page 2b
Safety / Protection: #-B
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Last Updated on:
Wednesday, November 29, 2017 05:39 AM |
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| Circuits Designed by Dave
Johnson, P.E. : |
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CIRCUIT PROTECTS FROM BATTERY POLARITY REVERSAL
This simple circuit can protect a sensitive electronic circuit from an accidental
connection of a battery with a reversed polarity. The N-channel FET connects
the electronic device to the battery only when the polarity is correct. The
circuit shown was designed for a device powered from a single 1.5 volts button cell
battery. However, the circuit will operate with higher voltages as well.
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Links to electronic circuits, electronic schematics, designs for engineers,
hobbyists, students & inventors:
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[GlobalSpec-AD/ad-smSQ-ihsGS.htm] |
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Circuit protects system from overheating - 8-Nov-01 Issue of EDN
The two-chip circuit in Figure 1 provides fan control and overtemperature
warning and shutdown signals to protect systems from excessive heat. The circuit
monitors the temperature of the pc board and the die temperature of a CPU, an
FPGA, or another IC with an on-chip temperature-sensing transistor.... [Design
Idea by Kerry Lacanette, Maxim Integrated Products, Sunnyvale, CA] |
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Circuit Provides Flexible gain Ranges - 06/21/01 EDN-Design
Ideas....Certain designs need a programmable-gain amplifier with a wide gain
range and high.... EDN is migrating links. This link is not verified.
Google the "title" EDN for new link. |
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Circuit provides reverse-battery protection - 12/21/00 EDN-Design
Ideas.... EDN is migrating links. This link is not verified. Search the
"title" EDN for new link. |
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Circuit Safely Deep Discharges NiCd Battery - 04/29/99 EDN-Design
Ideas....Nickel-cadmium (NiCd]batteries can possess an undesirable memory effect
due to partial discharges. The remedy is a complete discharge ... EDN is
migrating links. This link is not verified. Search the "title" + "EDN" for
new link. |
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COP100% Based Automated Security/Monitoring System - National Semiconductor
Application Note (app note added 2/06) |
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Current Limit Protects Power Bus - 12/18/97 EDN-Design Ideas.... EDN is
migrating links. This link is not verified. Search the "title" + "EDN" for new link.
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[GlobalSpec-AD/ad-smSQ-ihsGS.htm] |
[ad-djandassoc.htm] |
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Current Limiter Provides Latch up Signal - 01/01/98 EDN-Design
Ideas....Current-limiting circuit both signals a latch-up condition and prevents
latch-up-induced overcurrent destruction of a CMOS IC or group of ICs.... EDN is migrating
links. This link is not verified. Search the "title" + "EDN" for new link.
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Data acquisition system uses fault protection - 15-Apr-04 Issue of EDN
Sensitive systems, such as those in aircraft, must withstand fault conditions, thereby
avoiding component and system damage, because a sensor failure could cause a catastrophic
event to occur. A channel protector, comprising two n-channel MOSFETs connected in series
with a p-channel MOSFET, can protect sensitive components from voltage transients in the
signal path, whether or not the power sup.... [Design Idea by Catherine Redmond, Analog
Devices, Limerick, Ireland] |
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DC Fault Protection Circuit for Audio Amplifiers - Circuit ideas how to replace
traditional CD protection relays with MOSFETs (added 5/02) |
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Deep Discharge Protection for 12 V Batteries - ….must register on this site....
[Published in Elecktor July/August 2010] |
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Dual comparator thermally protects lithium-ion battery - 18-Sep-03 Issue of EDN
Most manufacturers recommend that you don't change lithium-ion batteries at temperatures
lower than 0°C or higher than 50°C. You can monitor both thresholds by adding a thermistor
and dual (window] comparator to a lithium-ion battery charger (Figure 1]. Set the
low-temperature trip point at 2.... [Design Idea by Mike Hess, Maxim Integrated Products,
Sunnyvale, CA] |
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[Google-ADS/i-ad-728x15-Links.htm] |
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