T&L Publications

Without a transformer, this is known notoriously as unisolated DC. That means that if you happen to touch a wire, it may serious harm or kill you as your body may be grounded by whatever you are touching or standing upon.<p>again and again you will find Nuts and Volts recommending using a transforme...

I suspect that your software is DOS dependent and that your installation of WindowsXP has upgraded beyond DOS. <p>If so, you can never go back again.<p>The Disk Defragment Utiltity will tell you if you are using FAT32 or NTFS. If you have moved over to NTFS, you no longer operate with DOS. [For some...

You can build your own PWM control using a 555 chip that inputs a voltage level and outputs a modulated pulse dependent upon the input voltage. Look in the manufacturer's fact sheets for this application or just Goggle around.

Lead Gel Cells are the least problematic. Simple to charge, hold a charge for a long time, and easy to acquire.<p>Nickel Cadium or Nickel Hydride don't have as much power and have special charging requirements.<p>Lithium batterys have lots of power, but cost a lot and may even explode into a firebal...