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So they do make regulators that will pass god solid 5A or more current. I haven't had any luck finding such a part. Assuming I find the regulators I need, would I need to up the source voltage using the charge pump to feed the regulators? I found a design to do this. Looks like I could increase the ...

Thanks for the design. However, someone said (in another topic) that transformers do not work with DC.
Are there transformers available that will take my 12v DC in, and give me a 1:10 boost? Are they available center-tapped to I can get a negative voltage too?
Thanks

Well, you're gonna have to set up a PC just for that purpose. If you use Windows 95, Windows 98, or Windows ME, you could just set the shell to Internet Explorer, and set the home page to your IP address or remote page. Or you could make it a local webpage, and this computer wouldn't depend on anoth...

OK, now I'm alittle confused. Trying to simplify this as much as I can... A transistor is nothing more than a gate. The collector is like the input. The emitter is like the output. And the base is like the control. If you put, say 10v on the collector, and used a say 5v regulator or zener on the bas...

OK, I understand (to my limited extent). So if I have 10-14vDC input, and need +12 (~10A), +5 (~20A), +3.3 (~20A), -12 (1A), -5.5 (1A), I should use maybe a voltage regulator or zener to drop the voltage down to a stable input voltage (maybe 5v), then a charge pump to increase that voltage back up (...

OK, I think I understand somewhat. But that leads to the next question, How would you increase a DC input voltage (say 12v) to DC high voltage output (say 120v). There are lots of diagrams for AC to DC, but I have yet to find a DC-DC design that goes much above 30vdc. Do transformers only work with ...

I have a diagram to use a MAX1044 charge pump to take +9v and increase it to +33v. http://www.geofex.com/circuits/+9_to_33.htm <p>This looks like it might be useful. However, the MAX1044 will only take 10.5v DC in, and I don't know how high you can increase the voltage considering the loss across th...

I have a basic understanding of a power transistor and what it does, but can someone explain the differences between a power transistor and a power mosfet.<p>Can a mosfet increase voltage output?
If so, can I input 13V DC and get amplification upwards of 10x?<p>Thanks.

Thanks, I'll do some searching for a schematic of a charge pump circuit. I actually have a hard drive based portable MP3 player. I even have it wired into my car stereo. However, it has it's drawbacks, it's not exactly easy to use, ocassionally pops and clicks, the batteries are limited, and on. Sim...

I've had a chance to further test my system board. Some of the power outputs to the board do not turn off during suspend to RAM, so my idea of keeping the +5VSB live and turning off everything else during suspend mode will not work. Also, this board is too old to support hibernate. So, I'm back on m...

Thanks Joseph,<p>Actually, I measured the voltage at the rectifier, which is where I got the +60/-80 ratings. It's a small/cheap power supply, but it works fine to power my AMD K6-2 500 processor and Socket 7 system board. A laptop hard drive will be used. No floppy, CD, or additional cards will be ...

I have a couple new ideas about power my PC via 12v DC. The key to remember is that the PC needs to support sleep mode, and still need sto draw under about .1A.<p>First thought, I have an ATX power supply that has a very simple circuit design. I could remove the rectifier, bypassing the 120v AC inpu...

Thanks,
I'll read over it. I see it has a monostable diagram. If I understand correclty, the monostable operation is what I'd be using for my application.

I need help with a 555 timer circuit design. I'll try to make this simple. I have: 12v car ingition input I need: a micro-relay to close a circuit (laptop power button), triggered by the ignition input, duration of trigger needs to be about 2 seconds.<p>Keep in mind, the car ignition is on till the ...

Thanks Lien and Denny,<p>To help understand the project goal, I plan to make a car PC. The start off goal is an MP3 player. I had one working, built from an old laptop, but it isn't strong enough for my desired end goal, a fully multimedia capable PC in car (DVD and Divx playback, music, maybe GPS, ...