|
Timer Exploits Opamp Bias Current - (07/21/94 EDN-Design Ideas / (added 5/03)
The simple, low-cost analog timer in Fig 1 exploits the parasitic input-bias
current of op-amp IC1. The timer achieves long time delays even though it uses
only low-value, inexpensive ceramic chip capacitors. After all, because the
input-bias current is the minimum current flow into an op amp, this....
|
|
Timer Light Switch - Typical circuit representative of those used in most
light switch type timers. The timer module is normally a PIC or custom chip, and
it syncs to the AC line so that a trigger pulse can be supplied at the right
moment. (added 2/05) |
|
Touch Activated Lamp (Bowden) - (electronic circuit added 7/03) |
|
Traffic Light Control Circuit 74145 - This page features a very basic traffic
light circuit that is built around the TTL family 74145 -1 of10 Decoder. The
circuit is designed to drive light emitting diodes that are connected in a common
anode arrangement. (added 4/02) |
|
Traffic Light Controller #2 - controls on3 LED traffic light sequence (added
4/02) |
|
TRIAC Light Controller - This project is intended for controlling mains
powered disco lighting, although there are many other possible uses for
controlling almost any mains appliance. It will control five seperate channels at
up to 3 Amp per channel. This could be increased by designing another PCB with
wider tracks than the PCB included with this design.... (added 2/06) |
|
TRIAC Light Controller zen22142 - (electronic diagram added 6/03) |
|
TRIAC Light Dimmer (Aaron Cake) - dim115-Volt lights up to about350-Watt
(added 08/08/08) |
|
TRIAC Light Dimmer (p62fugoj) - This little circuit can be used to dim lights
up to about350-Watts. It uses a simple, standard TRIAC circuit that, in my
experience, generates very little heat. Please note that this circuit cannot be
used with fluorescent lights. (added 4/02) |
|
TRIAC Light Dimmer (saburchill) - (electronic design added 9/02) |
|
TRIAC Lighting and Heating Controller uses Few Parts - 09/02/04 EDN Design
Ideas / (added 1/05) The triac lighting-control circuit in Figure 1 is
small and inexpensive because load and housekeeping power come directly from the
line voltage, thereby eliminating bulky, expensive supplies. The CLZD010
closed-loop controller maintains constant light intensity by automatically
adjusting the timing .... |
|
Trigger Circuit for Strobes - circuits which can be used for triggering
stroboscopes from external signals (added 4/02) |
|
Trip the Light Fantastic with LED Gadget Freaks - Here is a collection of the
best LED gadgets that have made themselves home in Gadget Freak…..(circuit
added08/08) |
|
Two Transistor LED Flasher - (electronic design added 9/02) |
|
Two Wire DC Lamp Dimmer Replaces Rheostats - 10/23/97 EDN-Design Ideas /
(added 3/03) Originally for use in commercial trucks, a low-cost dc lamp dimmer
(Figure 1) can control more than 100W of incandescent panel lighting and replaces
a high-power rheostat, whose heating darkens the instrument panel. The circuit has
several unique advantages: A two-wire connection means no change to existing .... |
|
Two-wire Lamp Flasher - This circuit has been designed to provide that
continuous light lamps already wired into a circuit, become flashing. Simply
insert the circuit between existing lamp and negative supply. Especially suited
for car or panel pilot lights, this device can drive lamps up to 10W....
(design added 11/06) |
|
Typical 120 Volt AC Dimmer Circuit - This is the type of common light dimmer
widely available at hardware stores and home centers. The circuit is a basic model
for light dimmer for120V AC voltages. This basic design can handle light bulbs at
power range of around30W to few hundred watts (depends on construction). (added
2/03) |
|
Typical Strobe Light Trigger Circuit - This circuit typically uses a voltage
around 300 volts for the main high voltage supply and needs a low voltage supply
of typically 6 to 15 volts…. (electronic Circuit / Schematic added 10/04) |
|
Ultra-Bright LED Lamp - (electronic Circuit / Schematic added 10/04) |
|
Universal Input Linear Fluorescent Ballast using the Ir2166 - The IR2166 Demo
Board 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
IR2166. (added 3/05) |
|
Using a Light Dimmer IC for AC Motor Speed Control - This circuit example uses
LS7231 Light Dimmer IC (added 6/06) |
|
Using the LM555 Timer with Photocell Detectors - (electronic circuit added
7/03) |
|
UV Light Box - (electronic circuit added 4/05) |
