Need help designing a light bulb blinker

Crazy Jayhawk · 09-21-03, 10:19 PM

I'm trying to build something that will turn a lightbulb on and off at a regular pace. Basically, it'll have a red bulb and a blue bulb and it'll switch back and forth between them. I'm trying to design something that makes it look like there's a cop car outside the window (it's a decoration for Casino Night at my dorm).

Is there an easy way to build one of these things? Also, I want to use 120V lightbulbs instead of LEDs. This thing needs to be fairly bright.

JimmyG · 09-23-03, 11:46 AM

You would need to use a timing IC to set up the time cycle and then drive a relay with that timing IC. You can go to Radioshack and look at some of their electronic projects and probably find exactly what you are looking for. If you can't find one, PM me and I can probably gin up a diagram to use. Are you handy with a soldering iron?

Blueacid · 09-23-03, 05:16 PM

Would this post not belong in Alt - modding?

RoadWarrior · 09-24-03, 05:56 AM

I think you want an astable multivibrator driving two relays or solid state switches. Two transistors, 4 caps, 4 resistors, a couple of trim pots and the relays, that simple enough?

RoadWarrior · 09-24-03, 07:47 AM

Aha, this is what I was thinking of....
http://www.uoguelph.ca/~antoon/circ/flash2.htm
Just take out R1 and R4 and the LEDs and replace them with 100 Ohm resistors and 6V relays, with a diode (1n4001) wired across the coil to stop back EMF. Then wire the lights through the relay contacts. You can replace R2 and R3 with 50K trim pots to vary the timing at will. I think RadioShack keeps 2N2222s though they are pretty easy to salvage from used equipment.

regards,

Road Warrior

09-21-03, 10:19 PM	Thread Starter #1
Crazy Jayhawk Join Date: Jul 2001 Location: Hutchinson, KS	Need help designing a light bulb blinker I'm trying to build something that will turn a lightbulb on and off at a regular pace. Basically, it'll have a red bulb and a blue bulb and it'll switch back and forth between them. I'm trying to design something that makes it look like there's a cop car outside the window (it's a decoration for Casino Night at my dorm). Is there an easy way to build one of these things? Also, I want to use 120V lightbulbs instead of LEDs. This thing needs to be fairly bright. __________________ Can someone please explain to me this Oni is a bot! business? Heatware
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09-23-03, 11:46 AM	#2
JimmyG Member Join Date: Apr 2001 Location: Michigan	You would need to use a timing IC to set up the time cycle and then drive a relay with that timing IC. You can go to Radioshack and look at some of their electronic projects and probably find exactly what you are looking for. If you can't find one, PM me and I can probably gin up a diagram to use. Are you handy with a soldering iron? __________________ Main Computer: INTEL 2600K; ASUS P8Z68 Deluxe; 850W Corsair; Antec P280 case;16 Gigs Corsair Vengance;EVGA 560 TI; 120 INTEL SSD; 2x500Gig WD HD; op system: Win 7-64; Backup computer:INTEL Q6600; 650W Corsair in Antec P180 Case; 4 Gigs RAM; EVGA GT430; Gigibyte P45T-ES3G mobo; 1x200 GB WD; 2x160 GB WD; 1x1GB WD. Operating system: Win 7 -64. *Avatar by Gresyth*
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09-23-03, 05:16 PM	#3
Blueacid Member Join Date: Sep 2001 Location: UK	Would this post not belong in Alt - modding?
	QUOTE Thanks

09-24-03, 05:56 AM	#4
RoadWarrior Senior Member Join Date: Nov 2001 Location: Niagara Falls, Ontario, Canada	I think you want an astable multivibrator driving two relays or solid state switches. Two transistors, 4 caps, 4 resistors, a couple of trim pots and the relays, that simple enough? __________________ Folder in disgrace. Folding rigs may be back online eventually, just as soon as real life gives me enough breaks. Black Belt Ubercloxx0r "Even though large tracts of Europe and many old and famous Folders have fallen or may fall into the grip of OCAU and all the odious apparatus of [H]ardOCP rule, we shall not flag or fail." "We shall go on to the end, we shall fold on the Newcastles, we shall fold on the Northwoods and Prescotts, we shall fold with growing confidence and growing strength on Venice, we shall defend our Forum, whatever the cost may be, we shall fold on the Winchesters, we shall fold on the Bartons, we shall fold on the Applebreds and Thunderbirds, we shall fold on the Coppermines; we shall never surrender!"
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09-24-03, 07:47 AM	#5
RoadWarrior Senior Member Join Date: Nov 2001 Location: Niagara Falls, Ontario, Canada	Aha, this is what I was thinking of.... http://www.uoguelph.ca/~antoon/circ/flash2.htm Just take out R1 and R4 and the LEDs and replace them with 100 Ohm resistors and 6V relays, with a diode (1n4001) wired across the coil to stop back EMF. Then wire the lights through the relay contacts. You can replace R2 and R3 with 50K trim pots to vary the timing at will. I think RadioShack keeps 2N2222s though they are pretty easy to salvage from used equipment. regards, Road Warrior __________________ Folder in disgrace. Folding rigs may be back online eventually, just as soon as real life gives me enough breaks. Black Belt Ubercloxx0r "Even though large tracts of Europe and many old and famous Folders have fallen or may fall into the grip of OCAU and all the odious apparatus of [H]ardOCP rule, we shall not flag or fail." "We shall go on to the end, we shall fold on the Newcastles, we shall fold on the Northwoods and Prescotts, we shall fold with growing confidence and growing strength on Venice, we shall defend our Forum, whatever the cost may be, we shall fold on the Winchesters, we shall fold on the Bartons, we shall fold on the Applebreds and Thunderbirds, we shall fold on the Coppermines; we shall never surrender!"
	QUOTE Thanks

Need help designing a light bulb blinker

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