Lighting Control Designers

This site contains people who design lighting controls for commercial spaces

http://www.lightingdesignlab.com/commercial/index.html

Lighting Controllers

This site contains designers who design commercial lighting for a
variety of places

http://www.lighttechdesign.com/selectedresidential.htm

http://www.lighttechdesign.com/selectedresidential.htm

There is some guidance available regarding commercial lighting
controls at this site

http://www.starfieldcorp.com/

Lighting Controllers

This book is handy for people who are interested in designing a
commercial light controller.

Only certain sections of the book are available as a preview, full
book can be purchased from the publisher.

http://books.google.co.in/books?id=GEIhCl2T-2EC&pg=PT482&lpg=PT482&dq=mall+lighting+control+system&source=bl&ots=7O9EZutrBR&sig=QuMqpK1avgctPYULgTDwvOxNnVk&hl=en&ei=OuIUSoGBA8GJkQW2sIzpDA&sa=X&oi=book_result&ct=result&resnum=1#PPT396,M1

Inverter Circuit: 12V to 220V 500W by 2N3055

http://www.elecfree.com/circuit/inverter-converter/inverter-12v-to-220v-500w-2N3055/

This is circuit Inverter 12VDC to 220V 50Hz 500W.It easy to make and Low cost.

12VDC Fluorescent Lamp Driver

http://www.electronics-lab.com/projects/motor_light/027/index.html

A number of people have been unable to find the transformer needed for the Black Light project, so I looked around to see if I could find a fluorescent lamp driver that does not require any special components. I finally found one in Electronics Now. Here it is. It uses a normal 120 to 6V stepdown transformer in reverse to step 12V to about 350V to drive a lamp without the need to warm the filaments.



Part
Total Qty.
Description
Substitutions
C1
1
100uf 25V Electrolytic Capacitor
C2,C3
2
0.01uf 25V Ceramic Disc Capacitor
C4
1
0.01uf 1KV Ceramic Disc Capacitor
R1
1
1K 1/4W Resistor
R2
1
2.7K 1/4W Resistor
Q1
1
IRF510 MOSFET
U1
1
TLC555 Timer IC
T1
1
6V 300mA Transformer
LAMP
1
4W Fluorescent Lamp
MISC
1
Board, Wire, Heatsink For Q1
Notes:
1. Q1 must be installed on a heat sink.
2. A 240V to 10V transformer will work better then the one in the parts list. The problem is that they are hard to find.
3. This circuit can give a nasty (but not too dangerous) shock. Be careful around the output leads.

Over / Under Voltage Cut-Out [Load Cut off]

http://www.electronic-circuits-diagrams.com/psimages/powersuppliesckt4.shtml

Over / Under Voltage Cut. This over/under voltage cut-out will save your costly electrical and electronic appliances from the adverse effects of very high and very low mains voltages. The circuit features auto reset and utilises easily available components. It makes use of the comparators available inside 555 timer ICs. Supply is tapped from different points of the power supply circuit for relay and control circuit operation to achieve reliability. The circuit utilises comparator 2 for control while comparator 1 output (connected to reset pin R) is kept low by shorting pins 5 and 6 of 555 IC. The positive input pin of comparator 2 is at 1/3rd of Vcc voltage . Thus as long as negative input pin 2 is less positive than 1/3 Vcc, comparator 2 output is high and the internal flip-flop is set, i.e. its Q output (pin 3) is high. At the same time pin 7 is in high impedance state and LED connected to pin 7 is therefore off. The output (at pin 3) reverses (goes low) when pin 2 is taken more positive than 1/3 Vcc. At the same time pin 7 goes low (as Q ouptput* of internal flip- flop is high) and the LED connected to pin 7 is lit. Both timers (IC1 and IC2) are configured to function in the same fashion. Preset VR1 is adjusted for under voltage (say 160 volts) cut-out by observing that LED1 just lights up when mains voltage is slightly greater than 160V AC. At this setting the output at pin 3 of IC1 is low and transistor T1 is in cut-off state. As a result RESET* pin 4 of IC2 is held high since it is connected to Vcc via 100 kilo-ohm resistor R4. Preset VR2 is adjusted for over voltage (say 270V AC) cut-out by observing that LED2 just extinguishes when the mains voltage is slightly less than 270V AC. With RESET* pin 4 of IC2 high, the output pin 3 is also high. As a result transistor T2 conducts and energises relay RL1, connecting load to power supply via its N/O contacts. This is the situation as long as mains voltage is greater than 160V AC but less than 270V AC. When mains voltage goes beyond 270V AC, it causes output pin 3 of IC2 to go low and cut-off transistor T2 and de-energise relay RL1, in spite of RESET* pin 4 still being high. When mains voltage goes below 160V AC, IC1’s pin 3 goes high and LED1 is extinguished. The high output at pin 3 results in conduction of transistor T1. As a result collector of transistor T1 as also RESET* pin 4 of IC2 are pulled low. Thus output of IC2 goes low and transistor T2 does not conduct. As a result relay RL1 is de-energised, which causes load to be disconnected from the supply. When mains voltage again goes beyond 160V AC (but less than 270V AC) the relay again energises to connect the load to power supply.