Showing posts with label Bulbs-Lamps. Show all posts
Showing posts with label Bulbs-Lamps. Show all posts

Saturday, March 18, 2017

Halogen bulb lamp dimmer circuit

Can someone provide me a (simple) schematic for a dimmer that would control 12 VAC about 80 watts. This would be used to control a lamp with halogen bulbs.

A comment in Hobby Hound

Here is a listing study them and choose, try out, learn and then build the one right for you.

1200 Watt Lamp Dimmer Circuit The following circuit is a lamp dimmer circuit that is capable of controlling up to 1200 Watts. The circuit uses the Q4015LT combination Diac and Triac that is available from Digikey Electronics.

PWM Motor Speed Controller / DC Light Dimmer - Here is a listing study them and choose, try out, learn and then build the one right for you.

DC Controlled Dimmer Velleman kit - K8064

Halogen bulb lamp dimmer circuit

Simple brightness adjustment by means of a DC voltage, optically isolated adjustment input. Pre-set adjustment for full brightness, suitable for incandescent lamps, mains voltage halogen lighting and low voltage halogen lighting in combination with a conventional transformer. "Soft start" feature to ensure lamp longevity, transformer protection in case of defective light sources

Electronic Transformer for 12V Halogen Lamp - STMicro
The topology of the circuit is the classic half-bridge. The control circuit could be realised using an IC (so fixing the operating frequency), but there is a more economical solution which consists of a selfoscillating circuit where the two transistors are driven in opposing phase by feedback from the output circuit.

delabs

Saturday, August 13, 2016

CFL Lamps and Simple Inverter

Kindly help me make one issue devoted to------ CFL Ballast Circuits----viz. circuits to drive a 5/7/9 / 11W....upto 18 watts CFL from a 6 volts / 12v DC battery, or Solar Panel,(or 220 volts AC Mains) Believe me, this is a crying need ,of the day, all over.

The market is flooded with poor Lanterns, that work for 2 to 4 months then they can't be repaired even. Some makes are either high-cost/high Quality, or low cost - low quality. Custom Ballast ICs coming nowadays are no use, because they are obsolete in 4 to 6 to 12 months..

Also, the circuit must have a (SMPS) power supply too, with overcharging * under voltage cutoff, as the CFL goes black, on being switched at low voltage.

mail from SRM

I can try to help you, Please Explain your need. Which way do you want me to help you.

CFL Lamps and Simple Inverter

A simple inverter for florescent lamps
This inverter is very easy to construct, reliable, and even powerful enough to light up a 15W florescent tube (if you cool your transistor well). The only hard-to-find piece of this baby is the so-called yellow inverter transformer

Oh no! Not Another CFL Inverter
This one’s a beauty. It will drive multiple CFLs without the need for heatsinks on the MOSFETs. Fit heatsinks and you can run even more, up to a total of 100W.

I can design with some SMPS type chips. Overcharging is only in Emergency Light Lamps. CFL's do not have this as they work on 230V. Make a more detailed specification. Then I can think more about it.

delabs

the problem is NOT that simple.............. problem is to RUN a CFL bulb, from a 6v/12v DC battery. Again, the problems are-----

1)Efficiency, of energy utilization, in the battery
2)Without using Custom LSIs(which go obsolete Unavailable in 6/12 months time and are replaced constantly ,by ever more sophisticated costlier models
3)Blackening of the ends of CFL, near electrodes
4)LIFE of CFL(supposedly--12000hours for European CFLs;8000hours for Advts;5000hours maybe ,reallife...
5)Simple Circuit, which can be easily repaired in the field, by non-technical people in village/small towns.
6)Low Cost--so, even the poorest person can buy use it
7)Fast Charging , of the Battery(out of 24 hours--likely to be used for 4/6/or 8 hours .So, it has to be charged in the balance of 24 hours...
8)Low Battery High Battery Cut-off; to prevent damage to battery CFL
9)Compliance with the Basic Ignition Data, furnished by CFL manufacturers.These are like----filament voltage,Ignition Voltage, Current etc

mail from SRM

Saturday, March 12, 2016

Low Cost Simple CFL lamp

my earlier email ,went unanswered.....  i need some circuit whiz to design a -----Low Cost / Simple discrete component (may include 555 IC ,but no Custom Ballast ICs..)  CIRCUIT----to light up a 7 watt 4 pin, CFL from a 6 volt 4 AH battery +220 volt mains+3 watt Solar Panel

the idea is to make available, reliable lanterns as product, or as a SKD / CKD KIT form, to enable local assembly for poor

mail from SRM



IRPLCFL2 design has schematic and BOM. 

IRPLCFL2 design has schematic and BOM.

The CFL-2 is an electronic ballast design for driving a 42 watt compact fluorescent lamp from a
120 or 230 volt AC line. The circuit was designed using the IR2156 Ballast Driver IC. The main
features of the circuit are programmable frequency, preheat time, over-current threshold and
dead time.

More Reading

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