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Illumination ring provides focused intensities - 9-Jul-09 Issue of EDN
Light up an area for optical inspection using LEDs under PWM control..... [Design Idea
by William Grill, Honeywell Aerospace, Olathe, KS] |
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Incandescent Lamp Inrush Current Limiter - This circuit limits the large
inrush current often associated with large incandescent lamps. With the
components shown the current is limited to 1 amp, but it could be scaled to any
desired current..... [Designed by David A. Johnson] |
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Infrared Detection - The following is a method to allow day and night
detection using Infrared/Visible light sensitive phototransistors and a simple LM339
voltage comparator circuit. [from Rob Paisley's Model Train web site] |
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Infrared Light Photo-Detector Circuit - In this circuit the light falling on
the phototransistor will be from an Infrared Light Emitting Diode (IrLED) but
otherwise it is the same as the phototransistor circuit shown above. When the
light falling on the phototransistor (Q1) is blocked, its conductance will decrease
and the voltage across Q1 will rise....scroll to find this circuit..... [from Rob
Paisley's Model Train web site] |
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Instrument panel Lamp dimmer control Circuit - This circuit uses an MC3392
low side protected switch and an MC1455 timing circuit to form an automotive
instrumentation panel lamp dimmer control. The brightness of incandescent
lamps….(electronic design added 09/08) |
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IR21571 Ballast Control IC Design Kit - The IRPLLNR2 is a high efficiency,
high power factor, fixed output electronic ballast designed for driving rapid start
fluorescent lamp types. The design contains an EMI filter, active power factor
correction and a ballast control circuit using the IR21571. This demo board is
intended to.....(added 3/05) |
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IR21592 Dimming Ballast Control IC Design Kit - The IRPLDIM1U is a high
efficiency, high power factor, dimming electronic ballast designed for driving rapid
start fluorescent lamp types. The design contains an EMI filter, active power factor
correction and a ballast control circuit using the IR21592. This demo board is
intended to ease the evaluation of the IR21592 Dimming Ballast Control IC.....(added
3/05) |
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IRPLMB1E: 25W 230VAC Small Size Ballast using IR2520D - The circuit is built
around the IR2520D Ballast Control IC. The IR2520D provides adjustable preheat time,
adjustable run frequency to set the lamp power, high starting frequency for soft start
and to avoid lamp flash, fault protection for open filament condition and failure to
strike, low AC line protection and auto-restart after line brownout conditions. line
brownout conditions. (added 3/05) |
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Japanesque Ceiling Light - This is a Japanesque ceiling light without any
electronics. Everybody will able to build easy even if they have no electronic skill.
(added 10/05) |
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Kodak Max flash unit - Schematic for the Kodak Max flash unit… |
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