Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Flame imitating lighting ?

Status
Not open for further replies.

smokiedabong

Newbie level 3
Joined
Oct 3, 2009
Messages
3
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,307
I'm looking to build a pulsating light that imitates a flame , something like the flameless candles but much more powerful .
At first I bought some flameless candles because I was thinking to hook the oscilator of the electric candle to a transistor and power a more powerful bulb . But to my surprise they have no oscillator inside , it's actually the LED that's pulsating . Is there a component that will variate current like that so it'll pulsate an ultrabright LED or a small bulb ? Or a simple circuit that will do that without using an Arduino ?
 

Halloween enthusiasts have many ways of accomplishing what you are looking for. I've seen those flameless candles glued/attached to a light sensitive resistor, driving the transistor for your larger bulb. For example, there is a simple trick to use a photocell and a commercial light dimmer... Here is a link to a page with many possible solutions:
Flickering Lights - Practice
 

I have built the following circuit . IC are the special flickering LEDs and the transistors are 2N2222A . The 8 LEDs are white with 3.5V voltage drop and 25 mA . All the LEDs light up at the same intensity and flikered nicely . The problem is when I tried to measure the amps to the LEDs the reading for three of them was 2mA and for the fourth was 55mA and after a minute or so the first burned out . I checked the circuit and there are no shorts , is there something wrong with this design ?

circuitcopy-1.jpg
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top