Hello,
I'm trying to build a variable DC power supply, I'm using TL494 for PWM and a NPN transistor as the switch.
I'm using a Buck topology, and my problem is that my voltage is fine without any load applied to it, but when I connect a simple led with a resistor the voltage drops a lot.
I'm...
In my company we're building a new maintenance shop and we need some sort of portable exhaust for the fumes and particle capturing.
Can anyone give me some brand names that may have this sort of product? :\
Thanx in advance
Does anyone knows how to build a mobile phone flasher?
I guess it has some sort of coil which transforms the waves in power, but I haven't found out how.
Thanx in advance, Carlos Cardoso
Hello,
I have an old computer with windows98 and my monitor broke.
I got one from a friend of mine, but the resolution I was using is too much for my actual monitor.
When windows starts everything gets unfocused, it gets so bad I can't even see the mouse. :(
How can I change the resolution to...
Hello,
I've recently joined a company in the maintenance management area.
In order to help him with the preventive management program and with the ISO standards for quality, my superior made an Access 97 application to help him out with this.
The thing is that, Microsoft is never happy with...
Hello,
I'm working at a fyber producing plant where we have a hoven equipped with two conveyor belts one to support the fyber at the bottom, and one at the top, so we can assure the size of the fyber.
But one of the production employees inadvertedly let a vroom stick inside and torned oneof...
Hello, has anyone worked with 82C55?
I'm trying to access it via memory mapped I/O with the 80C515. But it seems like it has a mind of it's own. The control word doesn't remains there and the ports don't change states when i order them to!
I'm writing my code in C.
Thanks in advance, Carlos...
Hello,
I have a problem, i have a circuit that is connected via a one shot with a flip flop.
But now I need a power on reset device so that the device won't turn on whenever i connect it to the power.
Thanks in advance for any help.
