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Lamp / Light
Control Circuits Page 9 Lamp Controls:
#'sAB-C DE-FG-KLM-NP-RST-UV-Z Last Updated on:
Monday, October 03, 2011 06:08 PM
Circuits Designed by Dave Johnson,
P.E. :
Pushbutton Controlled Up/Down Ramping Light
There are times when you want a lamp to gradually change from dark to light and
from light to dark, with each push of a pushbutton switch. The circuit
below performs ....
Pot Controlled Variable LED Intensity Circuit The circuit below uses power from four rechargeable AA NiMH cells to drive 3
white LEDs. A potentiometer varies the duty cycle of a pulse width
modulator circuit to vary the intensity of the LEDs from 0% to 100%. The
beauty of the circuit is that when the pot is all the way toward 0%,....
Ramping Lamp Driver 2
This circuit drives any 12v lamp, incandescent or LED type, in a ramping
fashion. Each press of the button toggles the lamp from a fully off mode
to a fully on mode. But, instead of an instantaneous lamp intensity
change, the power is slowly ramped up and down. With the components shown,
the ramping action takes two seconds to complete. By changing the
capacitor C3, you can increase or decrease the ramping time. The circuit
will also operate with supply voltages ranging from 15v to 3v.
Links to electronic
circuits, electronic schematics, designs for engineers, hobbyists, students &
inventors:
Outdoor Lighting Controller - When you step out of your
brightly-lit house into the darkness, it takes a while for your vision
to adjust. A solution to this problem is this outdoor light with
automatic switch-off. As a bonus, it will also make it a little bit
easier to find the keyhole when returning late at night.….must
register on this site.... [Published in Elecktor July/August 2010]
PC Controls Light Dimmer - 08/19/99 EDN-Design
Ideas.....control one light dimming from PC..... EDN is migrating
links. This link is not verified. Search the "title" + EDN for
new link.
Photo Detector Circuits (E+F) - This page features basic, visible light
photo-detector circuits that can be used to detect trains. These methods would
normally be used with the photo sensor mounted between the rails. The
sensors used are silicon phototransistors and Cadmium Sulfide (CdS) photocells.
Both of these sensors..... [from Rob Paisley's Model Train web site]
Photo Electric Street Light - This is basically a Schmitt Trigger
circuit which receives input from a cadmium sulfide photo cell and controls a
relay that can be used to switch off and on a street lamp at dawn and dusk. I have
built the circuit with a 120 ohm/12 volt relay and monitored performance using a
lamp dimmer, but did not connect the relay to an outside light. The photo cell
should be shielded from the lamp to prevent feedback and is usually mounted above
the light on top of a reflector and pointed upward at the sky so the lamp light
does not strike the photo cell and switch off the lamp. The photo cell is....
[Bill Bowden's circuit]
PIC 16c63 MIDI Controlled Light Dimmer - four channel dimmer controlable
using MIDI interface, operates at110-Volt AC, design can be modified to use
standard baud rates, and the RS-232 Electrical interface.....
