2 Lead Solid State Breaker Resets Itself:
03/30/95 EDN-Design Ideas / Simple dc circuit
breaker can protect a power supply from the
ever-present screwdriver or even isolate a
satellites dual power system from a short circuit in
one subsystem |
555 Timer MonoStable Circuit using Pushbutton:
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741 Based Light Sensor: CdS photocell used for
light/dark controlled relay |
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9 Second LED Relay Timer: |
Alternating On / Off Control: |
Analog switch lowers relay power consumption:
12/20/2001 EDN - Design Ideas / Designers often use
relays as electrically controlled switches. Unlike
transistors, their switch contacts are electrically
isolated from the control input. However, the power
dissipation in a relay coil may render the device
unattractive in battery-powered applications. You
can lower this dissipation by adding an analog
switch that allows the relay to operate at a lower
voltage (Figure 1). . |
CMOS Toggle Flip Flop With Relay(CD4013):
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Control 120 Volt AC Relay With TTL:
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Controlling Relays With Logic Voltages:
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Countdown timer With Relay: |
Dark / Light Activated Relay:
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Electronic Relay: medium power complementary
transistor pai will switch on and off a load up
to3A12V |
Electronic Thermostat Relay Circuit:
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Flip Flop Flashers, Buzzers, Etc.:
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KD2BD Video Operated Relay : turns on relay if
there is video signal present in the input
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Key Reading Circuit saves I/O Pins: 03/05/03 EDN-Design
Ideas / PDF contains multiple circuits -
scroll to find this circuit
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Latching Relay Driver: |
Light / Dark Detector: |
Load Sensing Automatic Switch: apply power to
the entire audio system by turning on1-item, simple
circuit |
Modular Relay System: |
Programmable Light Activated Relay:
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Relay Circuits use Reverse hysteresis: 05/08/97
EDN-Design Ideas |
Relay Delay Circuit: |
Remote Control turns Battery On & Off: 09/12/97
EDN-Design Ideas |
SCR Phase Control yields Solid State Switch:
03/15/01 EDN-Design Ideas / PDF contains multiple
circuits - scroll to find the one of interest / SCRs
(silicon-controlled rectifiers), or thyristors, have
higher current and voltage ratings, lower conduction
losses, and more robustness than triacs. For these
reasons, SCRs are better suited to high-power
applications. This is high power dimmer circuit
for115V AC.
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Simple Circuit Drives Latching Relays: 02/01/96
EDN-Design Ideas |
Simple Solenoid Driver Reduces Power & Cost:
07/18/96 EDN-Design Ideas |
Solenoid Starter: |
Solid State Relay Saves Battery's Life: 09/01/94
EDN-Design Ideas |
Switch Intelligently Controls Current: 03/30/00
EDN-Design Ideas / This circuit can intelligently
control ac or dc current when connected in series
with a load |
Time delay relay reduces inrush current:
03/07/2002 EDN - Design Ideas / A transformer
switching onto a line can sometimes cause a circuit
breaker to trip or a fuse to blow. This phenomenon
occurs even if the transformer presents no load,
such as when the secondary is open. The problem
arises because of the heavy magnetizing inrush
current in the transformer. The amplitude of the
current depends on the instant on the ac waveform at
which the transformer become... . |
Time Delay Relay: |
Transformer Driver Controls BiDirectional Switch:
07/17/97 EDN-Design Ideas / You can use a
transformer-driver IC to simply control a MOSFET
on/off switch |
Transistor Relay Driver: |
Two Lead Solid State Breaker Resets itself:
03/30/95 EDN-Design Ideas / Simple dc circuit
breaker can protect a power supply from the
ever-present screwdriver or even isolate a
satellites dual power system from a short circuit in
one subsystem |
Video Activated Relay: |
Water Activated Relay: |