Friday, September 26, 2014
Lamp Flasher Circuit Using Thermistors
For conditions of oscillation the characteristics of the two devices have to be chosen carefully. The operating point is determined by the intersection of the two curves.
Sunday, September 21, 2014
12VDC Fluorescent Lamp Driver circuit diagram and description
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.
Circuit diagram
Parts:
C1 100uf 25V Electrolytic Capacitor
C2,C3 0.01uf 25V Ceramic Disc Capacitor
C4 0.01uf 1KV Ceramic Disc Capacitor
R1 1K 1/4W Resistor
R2 2.7K 1/4W Resistor
Q1 IRF510 MOSFET
U1 TLC555 Timer IC
T1 6V 300mA Transformer
LAMP 4W Fluorescent Lamp
MISC 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.
Monday, September 1, 2014
Simpe 12 VDC Fluorescent Lamp Driver Circuit
Parts
| 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 |
Friday, August 22, 2014
Simple 6V lamp Flasher Wiring diagram Schematic
This is a simple lamp flasher schema diagram.Here you can use 6V lamp.I have added this for my bike.oh it is great at night I have used blue color bulb.
# Dont supply over 6V for this schema
# Build this schema on a PCB
Thursday, August 14, 2014
First LED lamp that replaces a 100 watt incandescent
Friday, August 8, 2014
Piezo Powered Lamp Circuit Schematics
Energy is becoming ever more expensive, and some fresh ideas are needed. There are already human-powered devices on the market, most of which employ a dynamo to generate power. It is also possible to recover energy from a piezo crystal of the sort found, for example, in the loudspeakers in greetings cards. Making use of this device is relatively straightforward.
Piezo-Powered Lamp Circuit Diagram :
Piezo crystals can generate voltages of many tens of volts when given a firm enough prod with a finger to bend the baseplate. The charge moved, however, is relatively small and the crystal is effectively a capacitor with a capacitance of only around 20 nF to 50 nF. This means that we need larger-scale storage in the form of an electrolytic capacitor.
The piezo crystal can be treated as an alternating current source. We therefore need a rectifier and a reservoir capacitor. Pressing the metal surface of the transducer ten or twenty times with a finger will charge the electrolytic in steps to the point where it has enough charge to drive a LED. The schema is a ‘charge pump’ in the full sense of the term.
When the button is pressed the electrolytic discharges into the LED, which emits a brief, but bright, flash of light.
Author : Burkhard Kainka - Copyright : Elektor
