How I design this circuit?

Mar 21, 2016 53 Replies

Or charge a LiPo for a while, then use it to run a toaster.

1000W for 5 minutes = 300kJ

Assuming 90% charge efficiency and a 500mA charge:

(300kJ) / (0.9 * 5V * 500mA) = 133.3 * 10^3 seconds = 1 day, 13 hours.

So -- charge for over a day and a half, toast a slice of bread, repeat. What's the problem?

Tim Wescott Wescott Design Services http://www.wescottdesign.com

Huh, OK I always figured a toaster was ~1 kW for a few minutes. And why not use the wall AC?

George H.

Huh, OK I always figured a toaster was ~1 kW for a few minutes. And why not use the wall AC?

George H.

Maybe you could make a little hot place with 50-100 W (from Klaus) and drag that over the bread slowly.

George H.

Right. No one would want a USB toaster. A WiFi enabled toaster is far more useful.

The problem depends on which USB connector type is on the toaster. ;-)

Ah, I see. A toaster that can also be used to recharge your smart-phone.

Yes, I'd buy one of those.

Sylvia.

On Mon, 21 Mar 2016 16:06:19 -0700 (PDT), George Herold Gave us:

Learn to read the thread. At least the original post, dingledorf.

Back in the Amiga days

Jamie

Lightning is only for iPhones.

Rick

Isn't every post here for the purpose of wasting time?

Rick

No. I can only speak for myself and I can only speculate on the motivations of others. My rants are intended to be educational and occasionally entertaining. Unfortunately, few have anything to do with electronics design. I sometimes suspect that I waste more time writing such rants, than the total time wasted by the few people that read them.

However, there is a small chance that you might be referring to the one line comments, devoid of information or substantiation, such as your comment above. Presumably, you had some purpose in mind other than wasting time, but it's certainly not obvious.

Hint: Don't post anything which you would not consider worth reading.

Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558

On Mon, 21 Mar 2016 23:02:08 -0400, rickman Gave us:

My Fluke Meter fix post wasn't.

And it works 100%. Batteries still full after 3 weeks, when it used to deplete a full 6 pack in less than 3 days.

easy with a single line of resistance wire. Unless insulated your toast would come out 90% cold with a nice hot strip at one end.

NT

You mean like the restaurant down the street (except for the warm strip at the end)?

Rick

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