Author Topic: how can I light a 100 watt lamp with simple circuit? (Read 5475 times)

mirsaeed · « **on:** October 28, 2016, 04:27:29 am »

hello all.
I tried to design a circuit that I can convert 1.5 to 220 ac to light up a 100 watt lamp.
but I faced with many problem.there are many sample but no one said chrachter of poly ster capacitor?transistor and tiny transformer?
could you help me?please
miralisaeed@gmail.com
thanks for good helps

NottheDan · « **Reply #1 on:** October 28, 2016, 04:42:02 am »

100 Watts? Wouldn't that draw in excess of 60A on the 1.5V side?

basinstreetdesign · « **Reply #2 on:** October 28, 2016, 04:42:53 am »

Can you show what circuit idea you have so far?
What are you using for a 1.5V source of power?
100 Watts is a lot of power for any 1.5V source I know. You realize that if a load takes 100Watts then the source must supply that much plus some more lost in the voltage conversion?

Skimask · « **Reply #3 on:** October 28, 2016, 04:44:08 am »

Did anybody else google that email address?

NottheDan · « **Reply #4 on:** October 28, 2016, 05:29:55 am »

Quote from: Skimask on October 28, 2016, 04:44:08 am

Did anybody else google that email address?

Now I did.

And now I have the urge to listen to West End Girls.

jonovid · « **Reply #5 on:** October 28, 2016, 05:44:27 am »

Quote

hello all.
I tried to design a circuit that I can convert 1.5 to 220 ac to light up a 100 watt lamp.
but I faced with many problem.there are many sample but no one said chrachter of poly ster capacitor?transistor and tiny transformer?
could you help me?please
miralisaeed@gmail.com
thanks for good helps

I seen that happen on stage then he then went on to pull a rabbit out of a hat.
magic is an art. and a magician never reveals his secrets.

Psi · « **Reply #6 on:** October 28, 2016, 07:48:30 am »

It's totally doable. Just going to be terribly inefficient.
Maybe 20%?
And its going to need a big ass heatsink to handle all that wasted power

Brumby · « **Reply #7 on:** October 28, 2016, 07:54:20 am »

I'll reserve comment until I know what the 1.5V source is going to be....

DimitriP · « **Reply #8 on:** October 28, 2016, 08:12:35 am »

Quote from: Brumby on October 28, 2016, 07:54:20 am

I'll reserve comment until I know what the 1.5V source is going to be....

Here you go:

DimitriP · « **Reply #9 on:** October 28, 2016, 08:28:49 am »

Quote from: Brumby on October 28, 2016, 07:54:20 am

I'll reserve comment until I know what the 1.5V source is going to be....

So many possibilities....

obiwanjacobi · « **Reply #10 on:** October 28, 2016, 10:39:51 am »

I would design a circuit that uses normal mains to light the 100W lamp and switch it with a Triac using the 1.5V to drive the gate...

Psi · « **Reply #11 on:** October 28, 2016, 10:49:29 am »

Quote from: obiwanjacobi on October 28, 2016, 10:39:51 am

I would design a circuit that uses normal mains to light the 100W lamp and switch it with a Triac using the 1.5V to drive the gate...

That's way to sensible, i want to see an array of 100 AA batteries in parallel driving this thing

DimitriP · « **Reply #12 on:** October 28, 2016, 11:04:52 am »

Quote from: obiwanjacobi on October 28, 2016, 10:39:51 am

I would design a circuit that uses normal mains to light the 100W lamp and switch it with a Triac using the 1.5V to drive the gate...

Here is a start: http://www.instructables.com/id/Small-Triac-Switch/

Ian.M · « **Reply #13 on:** October 28, 2016, 11:22:05 am »

Quote from: Psi on October 28, 2016, 10:49:29 am

Quote from: obiwanjacobi on October 28, 2016, 10:39:51 am
I would design a circuit that uses normal mains to light the 100W lamp and switch it with a Triac using the 1.5V to drive the gate...

That's way to sensible, i want to see an array of 100 AA batteries in parallel driving this thing

No. Far too complex. Just put app0rox 150 in series and light the bulb directly.

The worrying thing is: I immediately had a vision of a stack of groups of seven batteries packed in a plastic tube with a round double sided PCB with alignment pins between each group and as end plates so each group of seven cells is in series. Should be a nice 1.2m stack in a length of class 200 2" rigid PVC pipe. Its not quite as dangerous as the EEVBLOG BOFH cattleprod but should still be treated with respect.

On the saner side of things, 1.5V latching mains rated relays are readily available. They are commonly used in time-switches powered by a single AA battery.

danadak · « **Reply #14 on:** October 28, 2016, 03:49:53 pm »

Something like this, fully isolated so control side not a shock hazard.

Control V to switch on and off simple dc, can use with UP like Arduino,
or a solar cell or simple 2 cell battery and a switch.

http://www.ebay.com/itm/Crydom-Photo-Isolated-Solid-State-Relay-D1225-/112061716586?hash=item1a1766186a:g:2m8AAOSwqfNXjm7Y

Regards, Dana.

IanB · « **Reply #15 on:** October 28, 2016, 04:47:28 pm »

It's instructive to look at the history of cellphone boost chargers that tried to produce a 5 V 1 A output from a 1.5 V battery. The only one that was even half way successful used an Energizer Lithium battery rather than a simple alkaline cell. The others all resorted to using two AA cells rather than one. Since none of these solutions were really effective all the later power banks use a rechargeable lithium ion cell instead.

Therefore, we can say that if it is not feasible to boost 1.5 V to 5 V at 5 W, it will be beyond impossible to boost 1.5 V to 120 V at 100 W.

Ian.M · « **Reply #16 on:** October 28, 2016, 05:03:23 pm »

That depends - with enough capacitance on the HV bus, and enough time to charge it, it could light the bulb briefly once. A new Alkaline AA holds about 5KJ of energy, Assuming 50% losses, it should be possible to transfer about 2.5KJ into a 87000uF 250V capacitor bank, charged to 240V, which should light the bulb adequately for about 10 seconds before the voltage drops too low.

Caution: the circuit would not only bite, if anything goes wrong it could do you enough damage to make a closed coffin funeral advisable.

Edit: cant do basic maths. Now fixed

Zero999 · « **Reply #17 on:** October 28, 2016, 06:28:06 pm »

Presumably you're talking about an incandescent lamp? If so it's a bad idea. Go for LEDs, they will give the same amount of light with only 15W.

P90 · « **Reply #18 on:** October 29, 2016, 10:51:45 am »

But, where's the fun in that?

ralphrmartin · « **Reply #19 on:** October 29, 2016, 08:45:09 pm »

How about a supercapacitor? That should give you the current, if you have the rest of the circuit to give whatever voltage the bulb needs.


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Author Topic: how can I light a 100 watt lamp with simple circuit? (Read 5475 times)

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